Electronic Supplementary Material
JING GUO1, YUEPING LUO3, FEI GE2, YONGLAN DING1, JUNJIE FEI1
1
Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry
of Education, College of Chemistry, Xiangtan University, Xiangtan 411105, Hunan,
P.R. China
2
College of Chemical Engineering , Xiangtan University, Xiangtan 411105, Hunan,
P.R. China
3
Hunan Environmental Monitoring Centre, Changsha 410004, Hunan, P.R. China

Corresponding author: E-mail: fei_junjie@xtu.edu.cn; Tel: 86-731-58292251; Fax:
86-731- 58292205
Apparatus
Transmission electron microscopy (TEM) image was obtained using a JEM-2100 electron
microscope (JEOL, Japan). Atomic absorption spectrometry (AAS) determination was performed
in WFX-120 atomic adsorption spectrometer (Beijing Rayleigh Analytical Instrument Corp.). IR
spectra were recorded on a Perkin-Elmer Spectrum one FT-IR spectrophotometer at room
temperature.
Preparation of the thiol-functionalized mesoporous molecule-sieve (P123-SH)
Poly (alkylene oxide) block copolymer (P123, Aldrich, http://www.sigmaaldrich.com),
tetraethoxysilane (TEOS, Aldrich, http://www.sigmaaldrich.com) and 3-mercaptopropyltriethoxysilane (MPTS, New Materials of Organic Silicon Ltd. Com. of Wuhan University,
http://www.wdsilicone.cn) were used to synthesize P123-SH.
3.8 g P123 and 21.3 g KCl were dissolved in the 110 mL 2 M HCl solution, and 25 mL
double-distilled water while stirring at 318 K. To this solution 5.9 g TEOS and 4.8 g MPTS were
added. The reaction mixture was stirred at 318 K for 24 h, and then aged at 373 K for 24 h under
static conditions. Then the white precipitate solid was dried in air and distilled in soxhlet extractor
in 100 mL ethanol for 24 h.
8
Current /A
7
6
5
4
3
2
3
4
5
6
7
pH
Fig. S1 Effect of pH of supporting electrolyte solution on the anodic stripping peak current. Cd(II)
concentration: 0.5 μM; accumulation potential: -1.10 V; accumulation time: 3 min; scan rate: 100 mV
s−1.
12
Current / A
10
8
6
4
2
0
-1.2
-1.1
-1.0
-0.9
-0.8
Accumulation potential / V
Fig. S2 Effect of accumulation potential on the stripping peak currents of 0.5 μM Cd(II). Other
conditions are the same as in Fig. S1.
25
Current / A
20
15
10
5
0
0
2
4
6
8
10
Accumulation time / min
Fig. S3 Influence of accumulation time on the stripping peak currents of 0.5 μM Cd(II). Other
conditions are the same as in Fig. S1
1
2
3
4
-50
-100
A
600
400
Current /
Current / A
0
200
5
6
0
0
-150
-1.0
200 400 600 800
Concentration / M
-0.8
7
-0.6
-0.4
E/V
Fig. S4 Linear sweep voltammograms obtained under the optimized conditions, (1) 50 nM; (2) 0.5 μM ;
(3) 0.8 μM ; (4) 1.0 μM; (5) 3.0 μM; (6) 5.0 μM; (7) 7.0 μM.