MICHAEL R. HOFFMANN
Division of Engineering and Applied Science
W. M. Keck Laboratories
California Institute of Technology
1200 East California Blvd.
Pasadena, California 91125
mrh@caltech.edu ; http://hoffmann.caltech.edu; +1-626-395-4391
James
Irvine
Professor
of
Environmental
Science,
1996­
Dean of Graduate Studies, 2002-2008
Professor of Environmental Chemistry, Caltech, 1986-1995
Associate Professor of Environmental Science & Engineering, Caltech, 1980-1985
Associate Professor – Civil & Chemical Engineering, University of Minnesota, 19781980
Assistant Professor – Civil & Mineral Engineering, University of Minnesota, 19751978
Education
Northwestern University, BA, 1968; Brown University, PhD; 1974
California Institute of Technology, post-doctoral, 1973-1975, Environmental
Engineering
Selected
Honors
NCAA Athletic Scholarship (1964 – 1968)
Alexander von Humboldt Prize (1991)
E. Gordon Young Creative Advances Award (1995)
Lady Davis Distinguished Lecturer - Hebrew University - Jerusalem (1996)
Fellow of the International Union of Pure and Applied Chemistry (2000)
ACS Creative Advances in Environmental Science and Technology Award (2001)
Davis Distinguished Lecturer – University of New Orleans (2001)
Dodge Distinguished Lecturer – Yale University (2002)
Johnston Distinguished Lecturer – UC-Berkeley (2003)
R. Gordon Distinguished Lecturer – University of Toronto (2003)
Jack Edward McKee Medal – Water Environment Federation (2003)
Alexander von Humboldt Foundation Senior Scientist Award (2004)
Distinguished Visiting Scholar – Tsinghua University, Beijing (2008)
Innolec Lecturer – Masaryk University, Brno, Czech Republic (2008)
Distinguished Lecturer – National Taiwan University, Taiwan (2008)
Erudite Distinguished Scholar, State of Kerala, India (2010)
Distinguished Visiting Chair Professor, National Taiwan University, Taipei (2010)
Member of the National Academy of Engineering (Elected 2011)
1
Most
Highly
Cited
Publications
­
(H­index
=
70,
Total
Scientific
Citations
>
18,600)
Hoffmann, M. R., Martin, S. T., Choi W. Y., and Bahnemann, D. W., Environmental
Applications of Semiconductor Photocatalysis., Chem. Rev. 1995, 95, 69-96. ISI
Times Cited: 5176 – Google Scholar: 6945
Choi, W. Y.; Termin, A.; and Hoffmann, M. R., Role of Metal-Ion Dopants in QuantumSized TiO2 - Correlation between Photoreactivity and Charge-Carrier
Recombination Dynamics. J. Phys. Chem., 1994, 98, 13669-13679. Times Cited:
1212 - Google Scholar: 1531
Kormann C., Bahnemann D. W., and Hoffmann M. R., Preparation and Characterization
of Quantum-Size Titanium Dioxide, J. Phys. Chem., 1988, 92, 5196-5201. ISI Times
Cited: 528.
Bahnemann D. W., Kormann C., and Hoffmann M. R., Preparation and Characterization
of Quantum-Size Zinc Oxide - A Detailed Spectroscopic Study,. J. Phys. Chem., 1987
91, 3789-3798. Times Cited: 436
Kormann, C.; Bahnemann, D. W.; and Hoffmann, M. R., Photolysis of Chloroform and
Other Organic Molecules in Aqueous TiO2 Suspensions,. Environ. Sci. Technol.,
1991, 25, 494-500. Times Cited: 414
Kormann, C.; Bahnemann, D. W.; Hoffmann, M. R. Photocatalytic Production of H2O2 and
Organic Peroxides in Aqueous Suspensions of TiO2, ZnO, and Desert Sand, Environ.
Sci. Technol. 1988, 22, 798-806. Times Cited: 255
Synergistic Activities: Former Member of the Editorial Board of Journal of Physical
Chemistry; Visiting Committee of the Max Planck Institute for Chemistry – Mainz;
Member of the Editorial Board of the Journal of Atmospheric Chemistry, Visiting
Committee of the National University of Singapore; Consultant to the Los Angeles
Unified School District and the Belmont Learning Center; Faculty Athletic
Representative to the NCAA, Consultant to the South Coast Air Quality Management
District, Consultant to Falcon Water Technologies, Consultant to Discus Dental,
Consultant to 3M
Collaborators: William Goddard (Caltech), Hartmut Herrmann (Univ. Leipzig), Meinrat
Andreae (MPI – Mainz), Jack Beauchamp (Caltech), Nate Lewis (Caltech), Detlef
Bahnemann (Univ. of Hannover), Ron Cohen (UC-Berkeley), Mark Thiemens (UCSD),
Marc Baum (Oak Crest).
Former Students & Post-doctoral Fellows – Current Affiliation
Scot T. Martin – Harvard University (Prof)
Inez Hua – Purdue University (Prof)
Wonyong Choi – Postech, Korea (Prof)
Janet Kesselman – Mt. Sac College
(Prof)
Simo Pehkonen – Finland (Prof)
Hui-Ming Hung – Taiwan Nat. Univ
(Prof)
Ronald Siefert – US Naval Academy (Prof)
Linda Weavers – Ohio State (Prof)
Anne Johansen – C. Washington (Prof)
Yael Dubowski – Technion Univ. (Prof.)
2
Greg Roberts – UCSD – Scripps
Weng-Ki Ching – Claremont Grad
School
Steven Szczepankiewicz - Canisius Coll.
Catherine Cornu – Cambridge Univ. PD
Natasha Kotronarou – NTU – Athens
Andreas Termin – Amgen - Boulder
Daniel Jacob – Harvard University (Prof)
Andy Hong – University of Utah (Prof.)
Terri Olson – University of Michigan (Prof) Martha Conklin – UC-Merced (Prof)
Robert Arnold – University of Arizona Eric Betterton – U. Arizona (Prof)
(Prof)
German Mills – Auburn University (Prof)
Yigal Erel – Hebrew University (Prof)
Tom DiChristina – Georgia Tech (Prof)
Jeff Collett – Colorado State (Prof)
Bill Munger - Harvard University
Bruce Daube – Harvard University
Bruce Faust – UCLA (Prof)
Ralf Höchemer – Hoechst - Germany
Claudius Kormann – BASF, Germany
Jed Waldman – State of California
Amy Hoffman – Dames & Moore
Ken Leung – Environ - Consulting
Nicola Peill - Akamai
Scott Boyce – Rohm & Haas (PD)
Dieter Gunz – Lichtenstein (Prof)
Manabu Igawa – Kanagawa Univ. (Prof)
Elizabeth Carraway – Clemson (Prof)
Maria Suarez-Iha – Univ. Sao Paolo
(Prof)
Dean Willberg – Schlumberger
Jim McArdle – SmithKline
Joon-Woon Kang - Yonsei Univ. (Prof)
Hugo Destaillats – UC-Berkeley - LBNL
Tim Lesko – Schlumberger
Axel Kratel – Borland – Santa Cruz
Fok Leung – Wash State University (Prof)
Nathan Dalleska – Staff Scientist
Caltech
Marcelo Guzman – Harvard University PD
William Balzerski – PhD 2008
Chad Vecitis – Asst. Prof. Harvard (PD - Hyunwoong Park – Kyung-buk U. (Prof)
Yale)
Alicia Gonzales – PD- Argentina
Chris Boxe, Jet Propulsion Lab, CIT
Jina Choi – PhD 2009 – PD Caltech
Marta Escobar – PD – Argentina
Jie Cheng – PhD 2009 – PD Caltech
Administrative
Experience
Dean of Graduate Studies, 2002 - 2008
Executive Officer (i.e., Department Chair), 1996 – 2002
Chair of Ad Hoc Committee on Parking, Caltech, 2001
ESE Graduate Option Representative, 1999 – 2001
Commissioner (Faculty Chair), SCIAC Athletic Conference 1998-2000
ESE Graduate Admissions Officer, 1990 – 1998
Faculty Chair of Undergraduate Admissions, 1986 - 1988
Primary
Literature
Publications
(Ordered
from
Most
Recent)
Hoffmann, M. R.; Moss, J. A.; Baum, M. M., Artificial photosynthesis: semiconductor
photocatalytic fixation of CO2 to afford higher organic compounds, Dalton Trans.
2011, 40, 5151.
3
Zhao, D. M.; Cheng, J.; Vecitis, C. D.; Hoffmann, M. R., Sorption of Perfluorochemicals to
Granular Activated Carbon in the Presence of Ultrasound, J. Phys. Chem. A 2011,
115: 2250.
Zhao, D. M.; Cheng, J.; Hoffmann, M. R., Kinetics of microwave-enhanced oxidation of
phenol by hydrogen peroxide, Front , Environ. Sci. Eng. China 2011, 5: 57.
Kinugawa, T.; Enami, S.; Yabushita, A.; Kawasaki, M.; Hoffmann, M. R.; Colussi, A. J.,
Conversion of gaseous nitrogen dioxide to nitrate and nitrite on aqueous
surfactants, Phys. Chem. Chem. Phys. 2011, 13: 5144.
Hayase, S.; Yabushita, A.; Kawasaki, M.; Enami, S.; Hoffmann, M. R.; Colussi, A. J.,
"Heterogeneous Reaction of Gaseous Ozone with Aqueous Iodide in the Presence of
Aqueous Organic Species" J. Phys. Chem. A 2010, 114, 6016.
Ou, H. H.; Hoffmann, M. R.; Liao, C. H.; Hong, J. H.; Lo, S. L. "Photocatalytic oxidation of
aqueous ammonia over platinized microwave-assisted titanate nanotubes" Appl.
Catal. B-Environ. 2010, 99, 74.
Enami, S.; Stewart, L. A.; Hoffmann, M. R.; Colussi, A. J. "Superacid Chemistry on Mildly
Acidic Water" J. Phys. Chem. Lett. 2010, 1, 3488.
Enami, S.; Hoffmann, M. R.; Colussi, A. J. "Prompt Formation of Organic Acids in Pulse
Ozonation of Terpenes on Aqueous Surfaces" J. Phys. Chem. Lett. 2010, 1, 2374.
Boxe, C. S.; Worden, J. R.; Bowman, K. W.; Kulawik, S. S.; Neu, J. L.; Ford, W. C.;
Osterman, G. B.; Herman, R. L.; Eldering, A.; Tarasick, D. W.; Thompson, A. M.;
Doughty, D. C.; Hoffmann, M. R.; Oltmans, S. J. "Validation of northern latitude
Tropospheric Emission Spectrometer stare ozone profiles with ARC-IONS sondes
during ARCTAS: sensitivity, bias and error analysis" Atmos. Chem. Phys. 2010, 10,
9901.
Enami, S.; Hoffmann, M. R.; Colussi, A. J., Proton Availability at the Air/Water Interface,
J. Phys. Chem. Lett., 2010, 1, 1599-1604.
Enami, S.; Hoffmann, M. R.; Colussi, A. J., Molecular Control of Reactive Gas Uptake on
Water, J. Phys. Chem. A, 2010, 114, 5817-5822.
Vecitis, C. D.; Lesko, T.; Colussi, A. J.; Hoffmann, M. R., Sonolytic decomposition of
aqueous bioxalate in the presence of ozone, J. Phys. Chem. A, 2010, 114, 4968–
4980.
Vecitis, C. D.; Wang, Y. J.; Cheng, J.; Park, H.; Mader, B. T.; Hoffmann, M. R.
Sonochemical degradation of perfluorooctanesulfonate in aqueous film-forming
foams, Environ. Sci. Technol., 2010, 44, 432-438.
4
Choi, J.; Park, H.; Hoffmann, M. R., Combinatorial doping of TiO2 with platinum (Pt),
chromium (Cr), vanadium (V), and nickel (Ni) to achieve enhanced photocatalytic
activity with visible light irradiation, J. Mater. Res., 2010, 25, 149-158.
Choi, J.; Park, H.; Hoffmann, M. R. Effects of single metal-ion doping on the visible light
photoreactivity of TiO2, J. Phys. Chem. C., 2010, 114, 783-792.
Cheng, J.; Soetjipto, C.; Hoffmann, M. R.; Colussi, A. J., Confocal Fluorescence
Microscopy of the Morphology and Composition of Interstitial Fluids in Freezing
Electrolyte Solutions J. Phys. Chem. Lett. 2010, 1, 374-378.
Cheng, J.; Vecitis, C. D.; Park, H.; Mader, B. T.; Hoffmann, M. R., Sonochemical
Degradation of Perfluorooctane Sulfonate (PFOS) and Perfluorooctanoate (PFOA) in
Groundwater: Kinetic Effects of Matrix Inorganics., Env. Sci. Technol., 2010, 44, 445450.
Rincon, A. G.; Guzman, M. I.; Hoffmann, M. R.; Colussi, A. J. Thermochromism of Model
Organic Aerosol Matter J. Phys. Chem. Lett., 2010, 1, 368-373.
Rincon, A. G.; Guzman, M. I.; Hoffmann, M. R.; Colussi, A. J. Optical Absorptivity versus
Molecular Composition of Model Organic Aerosol Matter, J. Phys. Chem. A, 2009,
113, 10512-10520.
Campbell, T. Y.; Vecitis, C. D.; Mader, B. T.; Hoffmann, M. R. Perfluorinated Surfactant
Chain-Length Effects on Sonochemical Kinetics, J. Phys. Chem. A, 2009, 113, 98349842.
Cheng, J.; Psillakis, E.; Hoffmann, M. R.; Colussi, A. J. Acid Dissociation versus
Molecular Association of Perfluoroalkyl Oxoacids: Environmental Implications, J.
Phys. Chem. A, 2009, 113, 8152-8156.
Enami, S.; Hoffmann, M. R.; Colussi, A. J. Simultaneous Detection of Cysteine Sulfenate,
Sulfinate, and Sulfonate during Cysteine Interfacial Ozonolysis, J. Phys. Chem. B,
2009, 113, 9356-9358.
Enami, S.; Hoffmann, M. R.; Colussi, A. J. How Phenol and alpha-Tocopherol React with
Ambient Ozone at Gas/Liquid Interfaces, J. Phys. Chem. A, 2009, 113, 7002-7010.
Enami, S.; Hoffmann, M. R.; Colussi, A. J. Absorption of Inhaled NO2, J. Phys. Chem. B,
2009, 113, 7977-7981.
Psillakis, E.; Cheng, J.; Hoffmann, M. R.; Colussi, A. J. Enrichment Factors of
Perfluoroalkyl Oxoanions at the Air/Water Interface, J. Phys. Chem. A, 2009, 113,
8826-8829.
5
Rincon, A. G.; Guzman, M. I.; Hoffmann, M. R.; Colussi, A. J. Optical Absorptivity versus
Molecular Composition of Model Organic Aerosol Matter, J. Phys. Chem. A, 2009,
113, 10512-10520.
Vecitis, C. D.; Park, H.; Cheng, J.; Mader, B. T.; Hoffmann, M. R. Treatment technologies
for aqueous perfluorooctanesulfonate (PFOS) and perfluorooctanoate (PFOA),
Front. Environ. Sci. Eng. China, 2009, 3, 129-151.
Park, H.; Vecitis, C. D.; Hoffmann, M. R. Electrochemical Water Splitting Coupled with
Organic Compound Oxidation: The Role of Active Chlorine Species, J. Phys. Chem.
C, 2009, 113, 7935–7945
Yabushita, A.; Enami, S.; Sakamoto, Y.; Kawasaki, M.; Hoffmann, M. R.; Colussi, A. J.
Anion-Catalyzed Dissolution of NO2 on Aqueous Microdroplets, J. Phys. Chem. A
2009, 113, 4844-4848.
Park, H.; Vecitis, C. D.; Cheng, J.; Choi, W.; Mader, B. T.; Hoffmann, M. R. Reductive
Defluorination of Aqueous Perfluorinated Alkyl Surfactants: Effects of Ionic
Headgroup and Chain Length, J. Phys. Chem. A 2009, 113, 690-696.
Enami, S.; Hoffmann, M. R.; Colussi, A. J. Ozone Oxidizes Glutathione to a Sulfonic Acid,
Chem. Res. Toxicol. 2009, 22, 35-40.
Vecitis, C. D.; Park, H.; Cheng, J.; Mader, B. T.; Hoffmann, M. R. Kinetics and
mechanism of the sonolytic conversion of the aqueous perfluorinated surfactants,
perfluorooctanoate (PFOA), and perfluorooctane sulfonate (PFOS) into inorganic
products, J. Phys. Chem. A 2008, 112, 4261-4270.
Vecitis, C. D.; Park, H.; Cheng, J.; Mader, B. T.; Hoffmann, M. R. Enhancement of
Perfluorooctanoate and Perfluorooctanesulfonate Activity at Acoustic Cavitation
Bubble Interfaces, J. Phys. Chem. C 2008, 112, 16850-16857.
Silva, L. A.; Ryu, S. Y.; Choi, J.; Choi, W.; Hoffmann, M. R. Photocatalytic hydrogen
production with visible light over Pt-interlinked hybrid composites of cubic phase
and hexagonal phase CdS, J. Phys. Chem. C 2008, 112, 12069-12073.
Park, H.; Vecitis, C. D.; Hoffmann, M. R. Solar-powered electrochemical oxidation of
organic compounds coupled with the cathodic production of molecular hydrogen, J.
Phys. Chem. A 2008, 112, 7616-7626.
Park, H.; Vecitis, C. D.; Choi, W.; Weres, O.; Hoffmann, M. R., Solar-powered production
of molecular hydrogen from water, J. Phys. Chem. C 2008, 112, 885-889.
Park, H.; Choi, W.; Hoffmann, M. R., Effects of the preparation method of the ternary
CdS/TiO2/Pt hybrid photocatalysts on visible light-induced hydrogen production, J.
Mater. Chem. 2008, 18, 2379-2385.
6
Kim, K. N.; Hoffmann, M. R., Heterogeneous photocatalytic degradation of ethylene
glycol and propylene glycol, Korean J. Chem. Eng. 2008, 25, 89-94.
Enami, S.; Vecitis, C. D.; Cheng, J.; Hoffmann, M. R.; Colussi, A. J., Mass spectrometry of
interfacial layers during fast aqueous aerosol/ozone gas reactions of atmospheric
interest, Chem. Phys. Lett. 2008, 455, 316-320.
Enami, S.; Hoffmann, M. R.; Colussi, A. J., Ozonolysis of uric acid at the air/water
interface, J. Phys. Chem. B 2008, 112, 4153-4156.
Enami, S.; Hoffmann, M. R.; Colussi, A. J., Acidity enhances the formation of a persistent
ozonide at aqueous ascorbate/ozone gas interfaces, Proc. Natl. Acad. Sci. U. S. A.
2008, 105, 7365-7369.
Choi, J.; Ryu, S. Y.; Balcerski, W.; Lee, T. K.; Hoffmann, M. R., Photocatalytic production
of hydrogen on Ni/NiO/KNbO3/CdS nanocomposites using visible light, J. Mater.
Chem. 2008, 18, 2371-2378.
Cheng, J.; Vecitis, C. D.; Park, H.; Mader, B. T.; Hoffmann, M. R. Sonochemical
Degradation of Perfluorooctane Sulfonate (PFOS) and Perfluorooctanoate (PFOA) in
Landfill Groundwater: Environmental Matrix Effects, Environ. Sci. Technol. 2008,
42, 8057-8063.
Cheng, J.; Hoffmann, M. R.; Colussi, A. J. Anion fractionation and reactivity at air/water:
Methanol interfaces. Implications for the origin of Hofmeister effects, J. Phys.
Chem. B 2008, 112, 7157-7161.
Balcerski, W.; Ryu, S. Y.; Hoffmann, M. R. Gas-phase photodegradation of decane and
methanol on TiO2: Dynamic surface chemistry characterized by diffuse reflectance
FTIR, Int. J. Photoenergy 2008.
Ryu, S. Y.; Choi, J.; Balcerski, W.; Lee, T. K.; Hoffmann, M. R. Photocatalytic production
of H-2 on nanocomposite catalysts, Ind. Eng. Chem. Res. 2007, 46, 7476-7488.
Ryu, S. Y.; Balcerski, W.; Lee, T. K.; Hoffmann, M. R. Photocatalytic production of
hydrogen from water with visible light using hybrid catalysts of CdS attached to
microporous and mesoporous silicas, J. Phys. Chem. C 2007, 111, 18195-18203.
Guzman, M. I.; Hoffmann, M. R.; Colussi, A. J. Photolysis of pyruvic acid in ice: Possible
relevance to CO and CO2 ice core record anomalies, J. Geophys. Res. 2007, 112,
D10, Article Number D10123, DOI: 10.1029/2006JD007886
Grannas, A. M.; Jones, A. E.; Dibb, J.; Ammann, M.; Anastasio, C.; Beine, H. J.; Bergin,
M.; Bottenheim, J.; Boxe, C. S.; Carver, G.; Chen, G.; Crawford, J. H.; Domine, F.;
Frey, M. M.; Guzman, M. I.; Heard, D. E.; Helmig, D.; Hoffmann, M. R.; Honrath, R.
7
E.; Huey, L. G.; Hutterli, M.; Jacobi, H. W.; Klan, P.; Lefer, B.; McConnell, J.; Plane,
J.; Sander, R.; Savarino, J.; Shepson, P. B.; Simpson, W. R.; Sodeau, J. R.; von
Glasow, R.; Weller, R.; Wolff, E. W.; Zhu, T. An overview of snow photochemistry:
evidence, mechanisms and impacts, Atmos. Chem. Phys. 2007, 7, 4329-4373.
Enami, S.; Vecitis, C. D.; Cheng, J.; Hoffmann, M. R.; Colussi, A. J., Global inorganic
source of atmospheric bromine, J. Phys. Chem. A 2007, 111, 8749-8752.
Enami, S.; Vecitis, C. D.; Cheng, J.; Hoffmann, M. R.; Colussi, A. J. Electrospray mass
spectrometric detection of products and short-lived intermediates in aqueous
aerosol microdroplets exposed to a reactive gas, J. Phys. Chem. A 2007, 111,
13032-13037.
Balcerski, W.; Ryu, S. Y.; Hoffmann, M. R., Visible-light photoactivity of nitrogen-doped
TiO2: Photo-oxidation of HCO2H to CO2 and H2O, J. Phys. Chem. C 2007, 111, 1535715362.
Robinson, C.; Boxe, C. S.; Guzman, M. I.; Colussi, A. J.; Hoffmann, M. R. Acidity of frozen
electrolyte solutions, J. Phys. Chem. B 2006, 110, 7613-7616.
Locke, B. R.; Sato, M.; Sunka, P.; Hoffmann, M. R.; Chang, J. S. Electrohydraulic
discharge and nonthermal plasma for water treatment, Ind. Eng. Chem. Res. 2006,
45, 882-905.
Lesko, T.; Colussi, A. J.; Hoffmann, M. R. Sonochemical decomposition of phenol:
Evidence for a synergistic effect of ozone and ultrasound for the elimination of total
organic carbon from water, Environ. Sci. Technol. 2006, 40, 6818-6823.
Guzman, M. I.; Hildebrandt, L.; Colussi, A. J.; Hoffmann, M. R., Cooperative hydration of
pyruvic acid in ice, J. Am. Chem. Soc. 2006, 128, 10621-10624.
Guzman, M. I.; Colussi, A. J.; Hoffmann, M. R., Photogeneration of distant radical pairs
in aqueous pyruvic acid glasses, J. Phys. Chem. A 2006, 110, 931-935.
Guzman, M. I.; Colussi, A. J.; Hoffmann, M. R., Photoinduced oligomerization of aqueous
pyruvic acid, J. Phys. Chem. A 2006, 110, 3619-3626.
Cheng, J.; Vecitis, C. D.; Hoffmann, M. R.; Colussi, A. J. Experimental anion affinities for
the air/water interface, J. Phys. Chem. B 2006, 110, 25598-25602.
Boxe, C. S.; Colussi, A. J.; Hoffmann, M. R.; Perez, I. M.; Murphy, J. G.; Cohen, R. C.
Kinetics of NO and NO2 evolution from illuminated frozen nitrate solutions, J. Phys.
Chem. A 2006, 110, 3578-3583.
8
Moss, J. A.; Szczepankiewicz, S. H.; Park, E.; Hoffmann, M. R., Adsorption and
photodegradation of dimethyl methylphosphonate vapor at TiO2 surfaces, J. Phys.
Chem. B 2005, 109, 19779-19785.
McCabe, J. R.; Boxe, C. S.; Colussi, A. J.; Hoffmann, M. R.; Thiemens, M. H., Oxygen
isotopic fractionation in the photochemistry of nitrate in water and ice, J. Geophys.
Res., 2005, 110.
Ferguson, M. A.; Hoffmann, M. R.; Hering, J. G. TiO2-photocatalyzed As(III) oxidation in
aqueous suspensions: Reaction kinetics and effects of adsorption, Environ. Sci.
Technol. 2005, 39, 1880-1886.
Boxe, C. S.; Colussi, A. J.; Hoffmann, M. R.; Murphy, J. G.; Wooldridge, P. J.; Bertram, T.
H.; Cohen, R. C. Photochemical production and release of gaseous NO2 from
nitrate-doped water ice, J. Phys. Chem. A 2005, 109, 8520-8525.
Lesko, T. M.; Colussi, A. J.; Hoffmann, M. R. Hydrogen isotope effects and mechanism of
aqueous ozone and peroxone decompositions, J. Am. Chem. Soc. 2004, 126, 44324436.
Johansen, A. M.; Hoffmann, M. R., Chemical characterization of ambient aerosol
collected during the northeast monsoon season over the Arabian Sea: Anions and
cations, J. Geophys. Res.-Atmos., 2004, 109.
Hoffmann, M. R., Advanced water treatment using semiconductor electrodes,
Electrochemistry 2004, 72, 805-805.
Johansen, A. M.; Hoffmann, M. R., Chemical characterization of ambient aerosol
collected during the northeast monsoon season over the Arabian Sea: Labile-Fe(II)
and other trace metals, J. Geophys. Res.-Atmos., 2003, 108.
Cornu, C. J. G.; Colussi, A. J.; Hoffmann, M. R. Time scales and pH dependences of the
redox processes determining the photocatalytic efficiency of TiO2 nanoparticles
from periodic illumination experiments in the stochastic regime, J. Phys. Chem. B
2003, 107, 3156-3160.
Colussi, A. J.; Hoffmann, M. R., In situ photolysis of deep ice core contaminants by
Cerenkov radiation of cosmic origin, Geophys. Res. Lett. 2003, 30.
Ching, W. K.; Colussi, A. J.; Hoffmann, M. R. Soluble sunscreens fully protect E-coli
from disinfection by electrohydraulic discharges, Environ. Sci. Technol. 2003, 37,
4901-4904.
Boxe, C. S.; Colussi, A. J.; Hoffmann, M. R.; Tan, D.; Mastromarino, J.; Case, A. T.;
Sandholm, S. T.; Davis, D. D. Multiscale ice fluidity in NOx photodesorption from
frozen nitrate solutions, J. Phys. Chem. A 2003, 107, 11409-11413.
9
Szczepankiewicz, S. H.; Moss, J. A.; Hoffmann, M. R. Slow surface charge trapping
kinetics on irradiated TiO2, J. Phys. Chem. B 2002, 106, 2922-2927.
Szczepankiewicz, S. H.; Moss, J. A.; Hoffmann, M. R. Electron traps and the Stark effect
on hydroxylated titania photocatalysts, J. Phys. Chem. B 2002, 106, 7654-7658.
Luke, T. L.; Mohan, H.; Jacob, T. A.; Manoj, V. M.; Manoj, P.; Mittal, J. P.; Destaillats, H.;
Hoffmann, M. R.; Aravindakumar, C. T., Kinetic and spectral investigation of the
electron and hydrogen adducts of dihydroxy- and dimethyl-substituted pyrimidines:
a pulse radiolysis and product analysis study, J. Phys. Org. Chem. 2002, 15, 293305.
Luke, T. L.; Jacob, T. A.; Mohan, H.; Destaillats, H.; Manoj, V. M.; Manoj, P.; Mittal, J. P.;
Hoffmann, M. R.; Aravindakumar, C. T., Properties of the OH adducts of hydroxy-,
methyl-, methoxy-, and amino-substituted pyrimidines: Their dehydration reactions
and end-product analysis, J. Phys. Chem. A 2002, 106, 2497-2504.
Leung, F. Y. T.; Colussi, A. J.; Hoffmann, M. R.; Toon, G. C. Isotopic fractionation of
carbonyl sulfide in the atmosphere: Implications for the source of background
stratospheric sulfate aerosol, Geophys. Res. Lett. 2002, 29.
Hung, H. M.; Kang, J. W.; Hoffmann, M. R., The sonolytic destruction of methyl tert-butyl
ether present in contaminated groundwater., Water Environ. Res. 2002, 74, 545556.
Dubowski, Y.; Colussi, A. J.; Boxe, C.; Hoffmann, M. R., Monotonic increase of nitrite
yields in the photolysis of nitrate in ice and water between 238 and 294 K, J. Phys.
Chem. A 2002, 106, 6967-6971.
Destaillats, H.; Turjanski, A. G.; Estrin, D. A.; Hoffmann, M. R., Molecular structure
effects on the kinetics of hydroxyl radical addition to azo dyes, J. Phys. Org. Chem.
2002, 15, 287-292.
Leung, F. Y.; Colussi, A. J.; Hoffmann, M. R. Sulfur isotopic fractionation in the gasphase oxidation of sulfur dioxide initiated by hydroxyl radicals, J. Phys. Chem. A
2001, 105, 8073-8076.
Dubowski, Y.; Colussi, A. J.; Hoffmann, M. R. Nitrogen dioxide release in the 302 nm
band photolysis of spray-frozen aqueous nitrate solutions. Atmospheric
implications, J. Phys. Chem. A 2001, 105, 4928-4932.
Destaillats, H.; Lesko, T. M.; Knowlton, M.; Wallace, H.; Hoffmann, M. R. Scale-up of
sonochemical reactors for water treatment, Ind. Eng. Chem. Res. 2001, 40, 38553860.
10
Destaillats, H.; Alderson, T. W.; Hoffmann, M. R. Applications of ultrasound in NAPL
remediation: Sonochemical degradation of TCE in aqueous surfactant solutions,
Environ. Sci. Technol. 2001, 35, 3019-3024.
Cornu, C. J. G.; Colussi, A. J.; Hoffmann, M. R. Quantum yields of the photocatalytic
oxidation of formate in aqueous TiO2 suspensions under continuous and periodic
illumination, J. Phys. Chem. B 2001, 105, 1351-1354.
Ching, W. K.; Colussi, A. J.; Sun, H. J.; Nealson, K. H.; Hoffmann, M. R. Escherichia coli
disinfection by electrohydraulic discharges, Environ. Sci. Technol. 2001, 35, 41394144.
Weavers, L. K.; Malmstadt, N.; Hoffmann, M. R., Kinetics and mechanism of
pentachlorophenol degradation by sonication, ozonation, and sonolytic ozonation.,
Environ. Sci. Technol. 2000, 34, 1280-1285.
Szczepankiewicz, S. H.; Colussi, A. J.; Hoffmann, M. R., Infrared spectra of photoinduced
species on hydroxylated titania surfaces, J. Phys. Chem. B 2000, 104, 9842-9850.
Joseph, J. M.; Destaillats, H.; Hung, H. M.; Hoffmann, M. R., The sonochemical
degradation of azobenzene and related azo dyes: Rate enhancements via Fenton's
reactions, J. Phys. Chem. A 2000, 104, 301-307.
Johansen, A. M.; Siefert, R. L.; Hoffmann, M. R., Chemical composition of aerosols
collected over the tropical North Atlantic Ocean, J. Geophys. Res.-Atmos. 2000, 105,
15277-15312.
Hung, H. M.; Ling, F. H.; Hoffmann, M. R., Kinetics and mechanism of the enhanced
reductive degradation of nitrobenzene by elemental iron in the presence of
ultrasound, Environ. Sci. Technol. 2000, 34, 1758-1763.
Elbert, W.; Hoffmann, M. R.; Kramer, M.; Schmitt, G.; Andreae, M. O., Control of solute
concentrations in cloud and fog water by liquid water content, Atmos. Environ.,
2000, 34, 1109-1122.
Dubowski, Y.; Hoffmann, M. R., Photochemical transformations in ice: Implications for
the fate of chemical species, Geophys. Res. Lett. 2000, 27, 3321-3324.
Destaillats, H.; Hung, H. M.; Hoffmann, M. R., Degradation of alkylphenol ethoxylate
surfactants in water with ultrasonic irradiation, Environ. Sci. Technol. 2000, 34,
311-317.
Destaillats, H.; Colussi, A. J.; Joseph, J. M.; Hoffmann, M. R., Synergistic effects of
sonolysis combined with ozonolysis for the oxidation of azobenzene and methyl
orange, J. Phys. Chem. A 2000, 104, 8930-8935.
11
Dalleska, N. F.; Colussi, A. J.; Hyldahl, A. M.; Hoffmann, M. R., Rates and mechanism of
carbonyl sulfide oxidation by peroxides in concentrated sulfuric acid, J. Phys. Chem.
A 2000, 104, 10794-10796.
Colussi, A. J.; Hoffmann, M. R.; Tang, Y., Dynamic inhibition of constrained
crystallization by mesoscopic morphology modifiers, Langmuir 2000, 16, 24052408.
Colussi, A. J.; Hoffmann, M. R.; Tang, Y., Conformational disorder binds n-alkanes into
surface monolayers above the normal freezing point, Langmuir 2000, 16, 52135217.
Bange, H. W.; Rixen, T.; Johansen, A. M.; Siefert, R. L.; Ramesh, R.; Ittekkot, V.;
Hoffmann, M. R.; Andreae, M. O., A revised nitrogen budget for the Arabian Sea.,
Glob. Biogeochem. Cycle 2000, 14, 1283-1297.
Siefert, R. L.; Johansen, A. M.; Hoffmann, M. R., Chemical characterization of ambient
aerosol collected during the southwest monsoon and intermonsoon seasons over
the Arabian Sea: Labile-Fe(II) and other trace metals, J. Geophys. Res.-Atmos.
1999, 104, 3511-3526.
Kang, J. W.; Hung, H. M.; Lin, A.; Hoffmann, M. R., Sonolytic destruction of methyl tertbutyl ether by ultrasonic irradiation: The role of O3, H2O2, frequency, and power
density, Environ. Sci. Technol. 1999, 33, 3199-3205.
Johansen, A. M.; Siefert, R. L.; Hoffmann, M. R., Chemical characterization of ambient
aerosol collected during the southwest monsoon and intermonsoon seasons over
the Arabian Sea: Anions and cations, J. Geophys. Res.-Atmos. 1999, 104, 2632526347.
Hung, H. M.; Hoffmann, M. R., Kinetics and mechanism of the sonolytic degradation of
chlorinated hydrocarbons: Frequency effects., J. Phys. Chem. A 1999, 103, 27342739.
Colussi, A. J.; Hung, H. M.; Hoffmann, M. R., Sonochemical degradation rates of volatile
solutes, J. Phys. Chem. A 1999, 103, 2696-2699.
Colussi, A. J.; Hoffmann, M. R. Vapor supersaturation in collapsing bubbles. Relevance
to the mechanisms of sonochemistry and sonoluminescence., J. Phys. Chem. A
1999, 103, 11336-11339.
Weavers, L. K.; Ling, F. H.; Hoffmann, M. R. Aromatic compound degradation in water
using a combination of sonolysis and ozonolysis., Environ. Sci. Technol. 1998, 32,
2727-2733.
12
Weavers, L. K.; Hoffmann, M. R. Sonolytic decomposition of ozone in aqueous solution:
Mass transfer effects, Environ. Sci. Technol. 1998, 32, 3941-3947.
Siefert, R. L.; Johansen, A. M.; Hoffmann, M. R.; Pehkonen, S. O. Measurements of trace
metal (Fe, Cu, Mn, Cr) oxidation states in fog and stratus clouds., J. Air Waste
Manage. Assoc. 1998, 48, 128-143.
Peill, N. J.; Hoffmann, M. R. Mathematical model of a photocatalytic fiber-optic cable
reactor for heterogeneous photocatalysis., Environ. Sci. Technol. 1998, 32, 398-404.
Lang, P. S.; Ching, W. K.; Willberg, D. M.; Hoffmann, M. R. Oxidative degradation of
2,4.6-trinitrotoluene by ozone in an electrohydraulic discharge reactor., Environ.
Sci. Technol. 1998, 32, 3142-3148.
Kang, J. W.; Hoffmann, M. R. Kinetics and mechanism of the sonolytic destruction of
methyl tert-butyl ether by ultrasonic irradiation in the presence of ozone., Environ.
Sci. Technol. 1998, 32, 3194-3199.
Hung, H. M.; Hoffmann, M. R. Kinetics and mechanism of the enhanced reductive
degradation of CCl4 by elemental iron in the presence of ultrasound., Environ. Sci.
Technol. 1998, 32, 3011-3016.
Colussi, A. J.; Weavers, L. K.; Hoffmann, M. R. Chemical bubble dynamics and
quantitative sonochemistry., J. Phys. Chem. A 1998, 102, 6927-6934.
Weavers, L. K.; Hua, I.; Hoffmann, M. R. Degradation of triethanolamine and chemical
oxygen demand reduction in wastewater by photoactivated periodate., Water
Environ. Res. 1997, 69, 1112-1119.
Peill, N. J.; Hoffmann, M. R., Solar-powered photocatalytic fiber-optic cable reactor for
waste stream remediation., J. Sol. Energy Eng. Trans.-ASME 1997, 119, 229-236.
Peill, N. J.; Bourne, L.; Hoffmann, M. R. Iron(III)-doped Q-sized TiO2 coatings in a fiberoptic cable photochemical reactor., J. Photochem. Photobiol. A-Chem. 1997, 108,
221-228.
Kesselman, J. M.; Weres, O.; Lewis, N. S.; Hoffmann, M. R. Electrochemical production
of hydroxyl radical at polycrystalline Nb-doped TiO2 electrodes and estimation of
the partitioning between hydroxyl radical and direct Hole oxidation pathways., J.
Phys. Chem. B 1997, 101, 2637-2643.
Kesselman, J. M.; Lewis, N. S.; Hoffmann, M. R. Photoelectrochemical degradation of 4chlorocatechol at TiO2 electrodes: Comparison between sorption and
photoreactivity., Environ. Sci. Technol. 1997, 31, 2298-2302.
13
Hua, I.; Hoffmann, M. R. Optimization of ultrasonic irradiation as an advanced oxidation
technology., Environ. Sci. Technol. 1997, 31, 2237-2243.
Choi, W. Y.; Hoffmann, M. R. Novel photocatalytic mechanisms for CHCl3, CHBr3, and
CCl3CO2- degradation and the fate of photogenerated trihalomethyl radicals on
TiO2., Environ. Sci. Technol. 1997, 31, 89-95.
Willberg, D. M.; Lang, P. S.; Hochemer, R. H.; Kratel, A.; Hoffmann, M. R. Degradation of
4-chlorophenol, 3,4-dichloroaniline, and 2,4,6-trinitrotoluene in an electrohydraulic
discharge reactor., Environ. Sci. Technol. 1996, 30, 2526-2534.
Siefert, R. L.; Webb, S. M.; Hoffmann, M. R. Determination of photochemically available
iron in ambient aerosols., J. Geophys. Res.-Atmos. 1996, 101, 14441-14449.
Peill, N. J.; Hoffmann, M. R. Chemical and physical characterization of a TiO2-coated
fiber optic cable reactor., Environ. Sci. Technol. 1996, 30, 2806-2812.
Martin, S. T.; Kesselman, J. M.; Park, D. S.; Lewis, N. S.; Hoffmann, M. R. Surface
structures of 4-chlorocatechol adsorbed on titanium dioxide., Environ. Sci. Technol.
1996, 30, 2535-2542.
Hua, I.; Hoffmann, M. R. Kinetics and mechanism of the sonolytic degradation of CCl4:
Intermediates and byproducts, Environ. Sci. Technol. 1996, 30, 864-871.
Hoffmann, M. R.; Hua, I.; Hochemer, R. Application of ultrasonic irradiation for the
degradation of chemical contaminants in water., Ultrason. Sonochem. 1996, 3,
S163-S172.
Choi, W. Y.; Hoffmann, M. R. Kinetics and mechanism of CCl4 photoreductive
degradation on TiO2: The role of trichloromethyl radical and dichlorocarbene, J.
Phys. Chem. 1996, 100, 2161-2169.
Rossi, M. V.; Suarez-Iha, M. E. V.; Hoffmann, M. R. Spectrophotometric determination of
the stability constants of co(II) and DPKBH (di-2-pyridyl ketone benzoylhydrazone).,
Spectr. Lett. 1995, 28, 1153-1166.
Peill, N. J.; Hoffmann, M. R. Development and optimization of a TiO2 coated fiber optic
cable reactor - photocatalytic degradation of 4-chlorophenol., Environ. Sci. Technol.
1995, 29, 2974-2981.
Pehkonen, S. O.; Siefert, R. L.; Hoffmann, M. R. Photoreduction of iron oxyhydroxides
and the photooxidation of halogenated acetic-acids., Environ. Sci. Technol. 1995, 29,
1215-1222.
14
Martin, S. T.; Lee, A. T.; Hoffmann, M. R. Chemical mechanism of inorganic oxidants in
the TiO2/UV process - increased rates of degradation of chlorinated hydrocarbons.,
Environ. Sci. Technol. 1995, 29, 2567-2573.
Kotronarou, A.; Hoffmann, M. R. In Aquatic Chemistry - Interfacial and Interspecies
Processes; Huang, C. P., Omelia, C. R., Morgan, J. J., Eds., 1995; Vol. 244.
Hua, I.; Hochemer, R. H.; Hoffmann, M. R. Sonolytic hydrolysis of p-nitrophenyl acetate the role of supercritical water, J. Phys. Chem. 1995, 99, 2335-2342.
Hua, I.; Hochemer, R. H.; Hoffmann, M. R. Sonochemical degradation of p-nitrophenol in
a parallel-plate near-field acoustical processor, Environ. Sci. Technol. 1995, 29,
2790-2796.
Hoffmann, M. R.; Martin, S. T.; Choi, W. Y.; Bahnemann, D. W. Environmental
applications of semiconductor photocatalysis., Chem. Rev. 1995, 95, 69-96.
Herrmann, H.; Martin, S. T.; Hoffmann, M. R. Time-resolved radio-frequency
conductivity (TRRFC) studies of charge-carrier dynamics in aqueous semiconductor
suspensions., J. Phys. Chem. 1995, 99, 16641-16645.
Choi, W. Y.; Hoffmann, M. R. photoreductive mechanism of CCl4 degradation on TiO2
particles and effects of electron-donors., Environ. Sci. Technol. 1995, 29, 16461654.
Siefert, R. L.; Pehkonen, S. O.; Erel, Y.; Hoffmann, M. R. Iron photochemistry of aqueous
suspensions of ambient aerosol with added organic-acids., Geochim. Cosmochim.
Acta 1994, 58, 3271-3279.
Martin, S. T.; Herrmann, H.; Hoffmann, M. R. Time-resolved microwave conductivity. 2.
quantum-sized TiO2 and the effect of adsorbates and light-intensity on chargecarrier dynamics., J. Chem. Soc.-Faraday Trans. 1994, 90, 3323-3330.
Martin, S. T.; Herrmann, H.; Choi, W. Y.; Hoffmann, M. R. Time-resolved microwave
conductivity.1. TiO2 photoreactivity and size quantization., J. Chem. Soc.-Faraday
Trans. 1994, 90, 3315-3322.
Kesselman, J. M.; Shreve, G. A.; Hoffmann, M. R.; Lewis, N. S. Flux-matching conditions
at TiO2 photoelectrodes - is interfacial electron-transfer to O2 rate-limiting in the
TiO2 catalyzed photochemical degradation of organics, J. Phys. Chem. 1994, 98,
13385-13395.
Iha, M.; Pehkonen, S. O.; Hoffmann, M. R. Stability, stoichiometry, and structure of Fe(II)
and Fe(III) complexes with di-2-pyridyl ketone benzoylhydrazone - environmental
applications., Environ. Sci. Technol. 1994, 28, 2080-2086.
15
Hoffman, A. J.; Carraway, E. R.; Hoffmann, M. R. Photocatalytic production of H2O2 and
organic peroxides on quantum-sized semiconductor colloids., Environ. Sci. Technol.
1994, 28, 776-785.
Conforto, A.; Dudek, R.; Hoffmann, M. R.; Bing, R. J. The production of NO in
endothelial-cells by amphiphiles., Life Sci. 1994, 54, 1143-1153.
Choi, W. Y.; Termin, A.; Hoffmann, M. R. Effects of metal-ion dopants on the
photocatalytic reactivity of quantum-sized TiO2 particles , Angew. Chem.-Int. Edit.
Engl. 1994, 33, 1091-1092.
Choi, W. Y.; Termin, A.; Hoffmann, M. R. The role of metal-ion dopants in quantum-sized
TiO2 - correlation between photoreactivity and charge-carrier recombination
dynamics., J. Phys. Chem. 1994, 98, 13669-13679.
Carraway, E. R.; Hoffman, A. J.; Hoffmann, M. R. Photocatalytic oxidation of organicacids on quantum-sized semiconductor colloids., Environ. Sci. Technol. 1994, 28,
786-793.
Pehkonen, S. O.; Siefert, R.; Erel, Y.; Webb, S.; Hoffmann, M. R. Photoreduction of iron
oxyhydroxides in the presence of important atmospheric organic-compounds.,
Environ. Sci. Technol. 1993, 27, 2056-2062.
Mills, G.; Hoffmann, M. R. Photocatalytic degradation of pentachlorophenol on tio2
particles - identification of intermediates and mechanism of reaction., Environ. Sci.
Technol. 1993, 27, 1681-1689.
Hoffmann, M. R. Chemical pollution of the environment - past, present and future, CIBA
Found. Symp. 1993, 175, 23-41.
Erel, Y.; Pehkonen, S. O.; Hoffmann, M. R. Redox chemistry of iron in fog and stratus
clouds., J. Geophys. Res.-Atmos. 1993, 98, 18423-18434.
Pehkonen, S. O.; Erel, Y.; Hoffmann, M. R. Simultaneous spectrophotometric
measurement of Fe(II) and Fe(III) in atmospheric water., Environ. Sci. Technol.
1992, 26, 1731-1736.
Kotronarou, A.; Mills, G.; Hoffmann, M. R. Decomposition of parathion in aqueoussolution by ultrasonic irradiation., Environ. Sci. Technol. 1992, 26, 1460-1462.
Kotonarou, A.; Mills, G.; Hoffmann, M. R. Oxidation of hydrogen sulfide in aqueous
solution by ultrasonic irradiation, Environ. Sci. Technol. 1992, 26, 2420-2428.
Hoffman, A. J.; Yee, H.; Mills, G.; Hoffmann, M. R. Photoinitiated polymerization of
methyl-methacrylate using Q-sized ZnO colloids., J. Phys. Chem. 1992, 96, 55405546.
16
Hoffman, A. J.; Mills, G.; Yee, H.; Hoffmann, M. R. Q-sized CdS - synthesis,
characterization, and efficiency of photoinitiation of polymerization of several vinylic
monomers., J. Phys. Chem. 1992, 96, 5546-5552.
Ricci, J. C. D.; Woodford, B. J.; Kirschvink, J. L.; Hoffmann, M. R. Alteration of the
magnetic-properties of aquaspirillum magnetotacticum by a pulse magnetization
technique., Appl. Environ. Microbiol. 1991, 57, 3248-3254.
Kotronarou, A.; Mills, G.; Hoffmann, M. R. Ultrasonic irradiation of p-nitrophenol in
aqueous-solution., J. Phys. Chem. 1991, 95, 3630-3638.
Kotronarou, A.; Hoffmann, M. R. Catalytic autoxidation of hydrogen sulfide in
wastewater., Environ. Sci. Technol. 1991, 25, 1153-1160.
Kotronarou, A.; Hoffmann, M. R. Peroxymonosulfate - an alternative to hydrogenperoxide for the control of hydrogen sulfide., Res. J. Water Poll. Control Fed., 1991,
63, 965-970.
Kormann, C.; Bahnemann, D. W.; Hoffmann, M. R. Photolysis of chloroform and other
organic-molecules in aqueous TiO2 suspensions, Environ. Sci. Technol. 1991, 25,
494-500.
Collett, J. L.; Daube, B. C.; Hoffmann, M. R. Spatial and temporal variations in
precipitation and cloud interception in the Sierra Nevada of central California,
Tellus Ser. B-Chem. Phys. Meteorol. 1991, 43, 390-400.
Munger, J. W.; Collett, J.; Daube, B.; Hoffmann, M. R. Fogwater chemistry at Riverside,
California, Atmos. Environ.,1990, 24, 185-205.
Igawa, M.; Fukushi, Y.; Hayashita, T.; Hoffmann, M. R. Selective transport of aldehydes
across an anion exchange membrane via the formation of bisulfite adducts., Ind.
Eng. Chem. Res. 1990, 29, 857-861.
Gunz, D. W.; Hoffmann, M. R. Field investigations on the snow chemistry in central and
Southern California: 2. Carbonyls and carboxylic acids., Atmospheric Environment
Part a-General Topics 1990, 24, 1673-1684.
Gunz, D. W.; Hoffmann, M. R. Field investigations on the snow chemistry in Central and
Southern California: 1. Inorganic ions and hydrogen peroxide, Atmospheric
Environment Part a-General Topics 1990, 24, 1661-1671.
Gunz, D. W.; Hoffmann, M. R. Atmospheric chemistry of peroxides, Atmos. Environ.,
1990, 24, 1601-1633.
17
Collett, J. L.; Daube, B. C.; Munger, J. W.; Hoffmann, M. R. A comparison of 2
cloudwater fogwater collectors - the rotating arm collector and the Caltech Active
Strand Cloudwater Collector, Atmos. Environ., 1990, 24, 1685-1692.
Collett, J. L.; Daube, B. C.; Hoffmann, M. R. The chemical composition of intercepted
cloudwater in the Sierra Nevada., Atmos. Environ., 1990, 24, 959-972.
Collett, J. L.; Daube, B. C.; Gunz, D.; Hoffmann, M. R. Intensive studies of Sierra Nevada
cloudwater chemistry and its relationship to precursor aerosol and gas
concentrations, Atmos. Environ., 1990, 24, 1741-1757.
Betterton, E. A.; Hoffmann, M. R. Kinetics and mechanism of the oxidation of aqueous
hydrogen sulfide by peroxymonosulfate., Environ. Sci. Technol. 1990, 24, 1819-1824.
Arnold, R. G.; Hoffmann, M. R.; Dichristina, T. J.; Picardal, F. W. Regulation of
dissimilatory Fe(III) reduction activity in shewanella-putrefaciens, Appl. Environ.
Microbiol. 1990, 56, 2811-2817.
Olson, T. M.; Hoffmann, M. R. Hydroxyalkylsulfonate formation - its role as a S(IV)
reservoir in atmospheric water droplets., Atmos. Environ. 1989, 23, 985-997.
Munger, J. W.; Collett, J.; Daube, B.; Hoffmann, M. R. Chemical-composition of coastal
stratus clouds - dependence on droplet size and distance from the coast, Atmos.
Environ. 1989, 23, 2305-2320.
Leung, P. S. K.; Hoffmann, M. R. Kinetics and mechanism of the autoxidation of 2aminoethanethiol and ethanethiol catalyzed by cobalt(II) 4,4',4'',4'''tetrasulfophthalocyanine in aqueous-solution., J. Phys. Chem. 1989, 93, 434-441.
Leung, P. S. K.; Betterton, E. A.; Hoffmann, M. R. Kinetics and mechanisms of the
reduction of cobalt(II) 4,4',4'',4'''-tetrasulfophthalocyanine by 2-mercaptoethanol
under anoxic conditions., J. Phys. Chem. 1989, 93, 430-433.
Kormann, C.; Bahnemann, D. W.; Hoffmann, M. R. Environmental photochemistry - is
iron oxide (hematite) an active photocatalyst - a comparative-study - α-Fe2O3, ZnO,
TiO2., J. Photochem. Photobiol. A., 1989, 48, 161-169.
Keene, W. C.; Talbot, R. W.; Andreae, M. O.; Beecher, K.; Berresheim, H.; Castro, M.;
Farmer, J. C.; Galloway, J. N.; Hoffmann, M. R.; Li, S. M.; Maben, J. R.; Munger, J.
W.; Norton, R. B.; Pszenny, A. P.; Puxbaum, H.; Westberg, H.; Winiwarter, W. An
intercomparison of measurement systems for vapor and particulate phase
concentrations of formic and acetic-acids, J. Geophys. Res., 1989, 94, 6457-6471.
Igawa, M.; Munger, J. W.; Hoffmann, M. R. Analysis of aldehydes in cloud samples and
fogwater samples by hplc with a post-column reaction detector., Environ. Sci.
Technol. 1989, 23, 556-561.
18
Hong, A. P.; Boyce, S. D.; Hoffmann, M. R. Catalytic autoxidation of chemical
contaminants by hybrid complexes of cobalt(II) phthalocyanine., Environ. Sci.
Technol. 1989, 23, 533-540.
Faust, B. C.; Hoffmann, M. R.; Bahnemann, D. W. Photocatalytic oxidation of sulfur
dioxide in aqueous suspensions of α-Fe2O3., J. Phys. Chem. 1989, 93, 6371-6381.
Collett, J.; Daube, B.; Munger, J. W.; Hoffmann, M. R. Cloudwater chemistry in Sequoia
National Park., Atmos. Environ. 1989, 23, 999-1007.
Waldman, J. M.; Hoffmann, M. R. Nutrient leaching from pine needles impacted by
acidic cloudwater., Water Air Soil Pollut. 1988, 37, 193-201.
Olson, T. M.; Torry, L. A.; Hoffmann, M. R. Kinetics of the formation of
hydroxyacetaldehyde-sulfur(IV) adducts at low pH, Environ. Sci. Technol. 1988, 22,
1284-1289.
Olson, T. M.; Hoffmann, M. R. Formation kinetics, mechanism, and thermodynamics of
glyoxylic acid-s(iv) adducts, J. Phys. Chem. 1988, 92, 4246-4253.
Olson, T. M.; Hoffmann, M. R. Kinetics, mechanism, and thermodynamics of glyoxalS(IV) adduct formation., J. Phys. Chem. 1988, 92, 533-540.
Leung, P. S. K.; Hoffmann, M. R. Kinetics and mechanism of autoxidation of 2mercaptoethanol catalyzed by cobalt(II)-4,4',4'',4'''-tetrasulfophthalocyanine in
aqueous-solution., Environ. Sci. Technol. 1988, 22, 275-282.
Kormann, C.; Bahnemann, D. W.; Hoffmann, M. R. Photocatalytic production of H2O2 and
organic peroxides in aqueous suspensions of TiO2, ZnO, and desert sand., Environ.
Sci. Technol. 1988, 22, 798-806.
Kormann, C.; Bahnemann, D. W.; Hoffmann, M. R. Preparation and characterization of
quantum-size titanium dioxide., J. Phys. Chem. 1988, 92, 5196-5201.
Igawa, M.; Hoffmann, M. R. Active-transport of formaldehyde through an anionexchange membrane via the formation of bisulfite adducts, Chem. Lett. 1988, 597600.
Dichristina, T. J.; Arnold, R. G.; Lidstrom, M. E.; Hoffmann, M. R. Dissimilative iron
reduction by the marine eubacterium Alteromonas putrefaciens Strain-200., Water
Sci. Technol. 1988, 20, 69-79.
Conklin, M. H.; Hoffmann, M. R. Metal-ion sulfur(IV) chemistry: 1. Structure and
thermodynamics of transient copper(II)-sulfur(IV) complexes., Environ. Sci. Technol.
1988, 22, 883-891.
19
Conklin, M. H.; Hoffmann, M. R. Metal-ion sulfur(IV) chemistry: 2. Kinetic studies of the
redox chemistry of copper(II) sulfur(IV) complexes., Environ. Sci. Technol. 1988, 22,
891-898.
Conklin, M. H.; Hoffmann, M. R. Metal-ion sulfur(IV) chemistry: 3. Thermodynamics and
kinetics of transient iron(III) sulfur(IV) complexes., Environ. Sci. Technol. 1988, 22,
899-907.
Betterton, E. A.; Hoffmann, M. R. Oxidation of aqueous SO2 by peroxymonosulfate., J.
Phys. Chem., 1988, 92, 5962-5965.
Betterton, E. A.; Hoffmann, M. R. Henry’s law constants of some environmentally
important aldehydes, Environ. Sci. Technol. 1988, 22, 1415-1418.
Betterton, E. A.; Erel, Y.; Hoffmann, M. R. Aldehyde-bisulfite adducts - prediction of
some of their thermodynamic and kinetic properties., Environ. Sci. Technol. 1988,
22, 92-99.
Arnold, R. G.; Dichristina, T. J.; Hoffmann, M. R. Reductive dissolution of Fe(III) oxides by
pseudomonas sp 200., Biotechnol. Bioeng. 1988, 32, 1081-1096.
Waldman, J. M.; Jacob, D. J.; Munger, J. W.; Hoffmann, M. R. Pollutant deposition in
radiation fog., ACS Symposium Series 1987, 349, 250-257.
Waldman, J. M.; Hoffmann, M. R. Depositional aspects of pollutant behavior in fog and
intercepted clouds., Adv. Chem. Ser. 1987, 79-129.
Jacob, D. J.; Shair, F. H.; Waldman, J. M.; Munger, J. W.; Hoffmann, M. R. Transport and
oxidation of SO2 in a stagnant foggy valley., Atmos. Environ. 1987, 21, 1305-1314.
Hong, A. P.; Bahnemann, D. W.; Hoffmann, M. R. Cobalt(II) tetrasulfophthalocyanine on
titanium dioxide: 2. Kinetics and mechanisms of the photocatalytic oxidation of
aqueous sulfur dioxide., J. Phys. Chem. 1987, 91, 6245-6251.
Hong, A. P.; Bahnemann, D. W.; Hoffmann, M. R. Cobalt(II) tetrasulfophthalocyanine on
titanium dioxide - a new efficient electron relay for the photocatalytic formation and
depletion of hydrogen peroxide in aqueous suspensions., J. Phys. Chem. 1987, 91,
2109-2117.
Hoffmann, M. R.; Hong, A. P. K. Catalytic-oxidation of reduced sulfur compounds by
homogeneous and heterogeneous Co(II)-phthalocyanine complexes., Sci. Total
Environ. 1987, 64, 99-115.
20
Betterton, E. A.; Hoffmann, M. R. Kinetics, mechanism, and thermodynamics of the
reversible-reaction of methylglyoxal (CH3COCHO) with S(IV)., J. Phys. Chem. 1987,
91, 3011-3020.
Bahnemann, D. W.; Kormann, C.; Hoffmann, M. R. Preparation and characterization of
quantum size zinc-oxide - a detailed spectroscopic study., J. Phys. Chem. 1987, 91,
3789-3798.
Bahnemann, D. W.; Hoffmann, M. R.; Hong, A. P.; Kormann, C., Photocatalytic formation
of hydrogen peroxide., ACS Symposium Series 1987, 349, 120-132.
Bahnemann, D. W.; Hoffmann, M. R. Stabilization of free-radical intermediates on metal
oxide semiconductor surfaces., J. Electrochem. Soc. 1987, 134, C463-C463.
Olson, T. M.; Hoffmann, M. R. On the kinetics of formaldehyde-S(IV) adduct formation in
slightly acidic solution, Atmos. Environ. 1986, 20, 2277-2278.
Olson, T. M.; Boyce, S. D.; Hoffmann, M. R., Kinetics, thermodynamics, and mechanism
of the formation of benzaldehyde-S(IV) adducts., J. Phys. Chem. 1986, 90, 24822488.
Munger, J. W.; Tiller, C.; Hoffmann, M. R., Identification of hydroxymethanesulfonate in
fog water, Science 1986, 231, 247-249.
Jacob, D. J.; Waldman, J. M.; Munger, J. W.; Hoffmann, M. R., The H2SO4-HNO3-NH3
system at high humidities and in fogs: 2. Comparison of field data with
thermodynamic calculations., J. Geophys. Res., 1986, 91, 1089-1096.
Jacob, D. J.; Munger, J. W.; Waldman, J. M.; Hoffmann, M. R., The H2SO4-HNO3-NH3
system at high humidities and in fogs: 1. Spatial and temporal patterns in the San
Joaquin Valley of California, J. Geophys. Res.. 1986, 91, 1073-1088.
Hoffmann, M. R., Fog and cloud water deposition, ACS Symposium Series 1986, 318, 6491.
Hoffmann, M. R., On the kinetics and mechanism of oxidation of aquated sulfur dioxide
by ozone., Atmos. Environ. 1986, 20, 1145-1154.
Faust, B. C.; Hoffmann, M. R. Photoinduced reductive dissolution of α-Fe2O3 by bisulfite,
Environ. Sci. Technol. 1986, 20, 943-948.
Arnold, R. G.; Olson, T. M.; Hoffmann, M. R. Kinetics and mechanism of dissimilative
Fe(III) reduction by Pseudomonas SP-200., Biotechnol. Bioeng. 1986, 28, 1657-1671.
21
Arnold, R. G.; Dichristina, T. J.; Hoffmann, M. R. Inhibitor studies of dissimilative fe(iii)
reduction by Pseudomonas SP Strain-200 (Pseudomonas ferrireductans)., Appl.
Environ. Microbiol. 1986, 52, 281-289.
Waldman, J. M.; Munger, J. W.; Jacob, D. J.; Hoffmann, M. R., Chemical characterization
of stratus cloudwater and its role as a vector for pollutant deposition in a Los
Angeles pine forest, Tellus, 1985, 37, 91-108.
Leung, P. S. K.; Hoffmann, M. R., Kinetics and mechanism of the oxidation of 2mercaptoethanol by hydrogen peroxide in aqueous solution., J. Phys. Chem. 1985,
89, 5267-5271.
Jacob, D. J.; Waldman, J. M.; Munger, J. W.; Hoffmann, M. R., Chemical composition of
fogwater collected along the California coast., Environ. Sci. Technol. 1985, 19, 730736.
Jacob, D. J.; Waldman, J. M.; Haghi, M.; Hoffmann, M. R.; Flagan, R. C., Instrument to
collect fogwater for chemical analysis., Rev. Sci. Instrum., 1985, 56, 1291-1293.
Plastourgou, M.; Hoffmann, M. R. Transformation and fate of organic esters in layeredflow systems - the role of trace-metal catalysis., Environ. Sci. Technol. 1984, 18,
756-764.
Munger, J. W.; Jacob, D. J.; Hoffmann, M. R. The occurrence of bisulfate aldehyde
addition products in fogwater and cloudwater., J. Atmos. Chem. 1984, 1, 335-350.
Jacob, D. J.; Waldman, J. M.; Munger, J. W.; Hoffmann, M. R., A field investigation of
physical and chemical mechanisms affecting pollutant concentrations in fog
droplets, Tellus Ser. B. 1984, 36, 272-285.
Hoffmann, M. R. Acid Fog, Environ. Sci. Technol. 1984, 18, 61-64.
Boyce, S. D.; Hoffmann, M. R. Kinetics and mechanism of the formation of
hydroxymethanesulfonic acid at low pH, J. Phys. Chem. 1984, 88, 4740-4746.
Munger, J. W.; Jacob, D. J.; Waldman, J. M.; Hoffmann, M. R., Fogwater chemistry in an
urban atmosphere, J. Geophys. Res., 1983, 88, 5109-5121.
McArdle, J. V.; Hoffmann, M. R. Kinetics and mechanism of the oxidation of aquated
sulfur dioxide by hydrogen peroxide at low pH, J. Phys. Chem. 1983, 87, 5425-5429.
Jacob, D. J.; Waldman, J. M.; Munger, J. W.; Hoffmann, M. R., The chemicalcomposition of fogwater at some urban and rural sites., Aerosol Sci. Technol. 1983,
2, 181-181.
22
Jacob, D. J.; Hoffmann, M. R., A dynamic-model for the production of H+, NO3-, and SO42in urban fog, J. Geophys. Res., 1983, 88, 6611-6621.
Boyce, S. D.; Hoffmann, M. R.; Hong, P. A.; Moberly, L. M. Catalysis of the autoxidation of
aquated sulfur dioxide by homogeneous metal phthalocyanine complexes, Environ.
Sci. Technol. 1983, 17, 602-611.
Waldman, J. M.; Munger, J. W.; Jacob, D. J.; Flagan, R. C.; Morgan, J. J.; Hoffmann, M.
R. Chemical composition of acid fog, Science 1982, 218, 677-680.
Hoffmann, M. R.; Yost, E. C.; Eisenreich, S. J.; Maier, W. J. Characterization of soluble
and colloidal-phase metal-complexes in river water by ultrafiltration - a massbalance approach, Environ. Sci. Technol. 1981, 15, 655-661.
Hoffmann, M. R.; Faust, B. C.; Panda, F. A.; Koo, H. H.; Tsuchiya, H. M. Kinetics of the
removal of iron pyrite from coal by microbial catalysis, Appl. Environ. Microbiol.
1981, 42, 259-271.
Hoffmann, M. R.; Eisenreich, S. J., Development of a computer-generated equilibrium
model for the variation of iron and manganese in the hypolimnion of Lake Mendota.,
Environ. Sci. Technol. 1981, 15, 339-344.
Hoffmann, M. R. Thermodynamic, kinetic, and extra-thermodynamic considerations in
the development of equilibrium models for aquatic systems, Environ. Sci. Technol.
1981, 15, 345-353.
Hoffmann, M. R., Trace-metal catalysis in aquatic environments, Environ. Sci. Technol.
1980, 14, 1061-1066.
Hoffmann, M. R.; Lim, B. C., Kinetics and mechanism of the oxidation of sulfide by
oxygen - catalysis by homogeneous metal-phthalocyanine complexes, Environ. Sci.
Technol. 1979, 13, 1406-1414.
Hoffmann, M. R. Kinetics and mechanism of oxidation of hydrogen sulfide by hydrogenperoxide in acidic solution, Environ. Sci. Technol. 1977, 11, 61-66.
Hoffmann, M. R.; Stern, R. A.; Rieger, P. H.; Edwards, J. O. Kinetic study of
pyrophosphate and peroxodiphosphate complexation of oxovanadium(IV) ion., Inorg.
Chim. Acta, 1976, 19, 181-187.
Hoffmann, M. R.; Edwards, J. O. Kinetics of oxidation of sulfite by hydrogen peroxide in
acidic solution, J. Phys. Chem. 1975, 79, 2096-2098.
Hoffmann, M. R.; Edwards, J. O. Some new rhodium(I)-aziridine complexes, Inorg. Nucl.
Chem. Lett., 1974, 10, 837-843.
23
Patents
Weres, O.; Hoffmann, M. R., Electrode, electrode manufacturing process and
electrochemical cell, U.S. Patent 5,419,824, 1994.
Weres, O.; Hoffmann, M. R., Electrochemical Method and Device for Generating Hydroxyl
Free Radicals and Oxidizing Chemical Substances Dissolved in Water., U.S. Patent
5,364,508, 1994.
Weres, O.; Hoffmann, M. R., Electrochemical Device for Generating Hydroxyl Free
Radicals and Oxidizing Chemical Substances Dissolved in Water, U.S. Patent
5,439,577, 1995.
Weres, O., Hoffmann, M. R., Electrode with Surface Comprising Oxides of Titanium and
Bismuth and Water Purification Process Using This Electrode, U.S. Patent Appl.
6589405, 2008.
M. R. Hoffmann and R. G. Arnold (1989) "Microbial Reduction of Iron Ore," United States
Patent, Patent Number: 4,880,740; Date: Nov. 14, 1989.
B. C. Daube, Jr., R. C. Flagan, and M. R. Hoffmann (1987) "Active Cloudwater Collector,"
United States Patent, Patent Number: 4,697,462; Date: Oct. 6, 1987.
B. C. Daube, Jr., R. C. Flagan, and M. R. Hoffmann (1988) "Automated Rainwater
Collector," United States Patent, Patent Number: 4,732,037; Date: Mar. 22, 1988.
Peill, N., and Hoffmann, M. R. (1999) "TiO2-Coated Fiber Optic Cable Reactor," United
States Patent (California Institute of Technology, USA), 24 pp. Patent Number
5,875,384 February 23, 1999.
24