Facile and Scalable Preparation of Graphene OxideBased Magnetic Hybrids for Fast and Highly Efficient
Removal of Organic Dyes
Tifeng Jiao1,2,3, Yazhou Liu2, Yitian Wu2*, Qingrui Zhang2, Xuehai Yan4, Faming Gao2, Adam J.
P. Bauer3, Jianzhao Liu3, Tingying Zeng5, and Bingbing Li3*
1
State Key Laboratory of Metastable Materials Science and Technology, Yanshan University,
Qinhuangdao 066004, P. R. China
2
Hebei Key Laboratory of Applied Chemistry, School of Environmental and Chemical
Engineering, Yanshan University, Qinhuangdao 066004, P. R. China
3
Department of Chemistry and Biochemistry, Central Michigan University, Mount Pleasant, MI
48859, USA
4
National Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese
Academy of Sciences, Beijing 100190, P. R. China
5
Research Laboratory for Electronics, Massachusetts Institute of Technology, Cambridge, MA
02139, USA
*Corresponding Authors: Yitian Wu (wu6y@cmich.edu) and Bingbing Li (li3b@cmich.edu;
989-774-3441)
Figure S1. A TEM image of multifaceted Fe3O4 nanoparticles.
A
B
500 nm
A’
C
500 nm
B’
500 nm
500 nm
C’
500 nm
500 nm
Figure S2. Morphology of Fe3O4 nanoparticles including (A, A’) fine nanoparticles (100 nm diameter),
(B, B’) nanospheres (~ 100 nm diameter), and (C, C’) multifaceted nanoparticles. Images A-C are
scanning electron micrographs and images A’-C’ are transmission electron micrographs.
Purchased sample
d
Intensity[a.u]
311
220
400
c
511
440
422
b
a
10
20
30
40
50
60
2[degree]
70
80
Figure S3. X-ray diffraction patterns for Fe3O4 nanoparticles prepared using different amount of sodium
hydroxide (NaOH) (a) 0.4 g, (b) 0.6 g, and (c) 0.8 g, along with a purchased nanoparticle sample.
Magnetisation[emu/g]
80
A
b
a
40
c
0
-40
-80
-20000
40
Magnetisation[emu/g]
B
-10000
0
Applied Field [Oe]
10000
20000
20
a
b
c
0
-20
-40
-20000
-10000
0
Applied Field [Oe]
10000
20000
Figure S4. Magnetic hysteresis loops of (A) Fe3O4 nanoparticles and (B) 5:4 by mass GO/Fe3O4
hybrids. The Fe3O4 nanoparticles were prepared using different amount of sodium hydroxide (a)
0.4 g, (b) 0.6 g, and (c) 0.8 g.
50
Degradation (%)
UV light
Visible light
Sun light
Methyl blue
40
30
20
10
0
0
20
40
60
80
100
Time (min)
Figure S5. The percent degradation rate versus time plots for methyl blue in the presence of neat Fe3O4
nanoparticles.
50
methylene blue
UV light
Visible light
Sun light
Degradation (%)
40
30
20
10
0
0
20
40
60
80
100
Time (min)
Figure S6. The percent degradation rate versus time plots for methylene blue in the presence of neat
Fe3O4 nanoparticles.
50
Rhodamine B
UV light
Visible light
Sun light
Degradation (%)
40
30
20
10
0
0
20
40
60
80
100
Time (min)
Figure S7. The percent degradation rate versus time plots for Rhodamine B in the presence of neat Fe3O4
nanoparticles.
Removal [%]
100
90
pH=4
pH=5
pH=6
pH=7
pH=8
80
70
0
20
40
60
80
100
Time [minute]
Figure S8 The percent dye removal rate versus time plots for the adsorption of RhB at different pH
values using GO/Fe3O4 nanohybrids (G5F2) prepared from multifaceted nanoparticles.