Electrochemical reduction of 2,4-dinitrophenol on nanocomposite electrodes modified with mesoporous silica and poly(vitamin B 1) films

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 incorpora...

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Bibliographic Details
Published in:Electrochimica acta 2011-08, Vol.56 (20), p.7097-7103
Main Authors: Yang, Ping, Cai, Hui, Liu, Shantang, Wan, Qijin, Wang, Xiaoxia, Yang, Nianjun
Format: Article
Language:English
Subjects:
2,4-Dinitrophenol
Analysis methods
Analytical chemistry
Applied sciences
Chemistry
Electrochemical methods
Electrochemical sensors
Electrodes
Exact sciences and technology
Lakes
Mesoporous silica
Nanocomposite-modified electrodes
Nanocomposites
Nanomaterials
Nanoparticles
Nanostructure
Natural water pollution
Pollution
Poly(vitamin B 1) film
Reduction
Silicon dioxide
Water treatment and pollution
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Summary: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 −0.25 V, 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 μM. The modified electrode demonstrated a long lifetime for the detection of 2,4-dinitrophenol. The detection limit of 2,4-dinitrophenol was 0.5 μM. Moreover, the modified electrode was used successfully to detect 2,4-dinitrophenol in lake water.
ISSN:0013-4686
1873-3859
DOI:10.1016/j.electacta.2011.05.102