期刊
ELECTROCHIMICA ACTA
卷 56, 期 20, 页码 7097-7103出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2011.05.102
关键词
Electrochemical sensors; Nanocomposite-modified electrodes; Mesoporous silica; Poly(vitamin B-1) film; 2,4-Dinitrophenol
资金
- National Natural Science Foundation of China [21075096, 20873097]
- Science Foundation of Department of Education of Hubei Province, China [D20091501]
Electrochemical reduction of 2,4-dinitrophenol was investigated on a glassy carbon electrode modified with a nanocomposite Santa Barbara Amorphous silica (SBA-15) film and poly(vitamin B-1) film. For sensitive and selective detections, vanadium pentoxide and cerium oxide nanoparticles were incorporated into the matrix of SBA-15. 2,4-Dinitrophenol was reduced on the modified electrode at -0.39 and -0.25V, corresponding to the reduction of 4-dinitrophenol and 2-dinitrophenol, respectively. Both cathodic peak currents were controlled by the diffusion of 2,4-dinitrophenol. The amplitude of the peak currents was proportional to the 2,4-dinitrophenol concentration in the range of 3.0-30 mu M. The modified electrode demonstrated a long lifetime for the detection of 2,4-dinitrophenol. The detection limit of 2,4-dinitrophenol was 0.5 mu M. Moreover, the modified electrode was used successfully to detect 2,4-dinitrophenol in lake water. (C) 2011 Elsevier Ltd. All rights reserved.
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