Electrochemical reduction of 2,4-dinitrophenol on nanocomposite electrodes modified with mesoporous silica and poly(vitamin B1) films |
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| Authors: | Ping Yang Hui Cai Shantang Liu Qijin Wan Xiaoxia Wang Nianjun Yang |
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| Affiliation: | aSchool of Chemical Engineering & Pharmacy, Wuhan Institute of Technology, Wuhan 430073, China;bKey Laboratory for Green Chemical Process of Ministry of Education, Wuhan 430073, China;cHubei Key Lab of Novel Reactor & Green Chemical Technology, Wuhan 430073, China;dBlumenstrasse 6, Gundelfingen 79194, Germany;eFraunhofer-Institute for Applied Solid State Physics (IAF), Freiburg 79108, Germany |
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| Abstract: | 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 B1) 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. |
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| Keywords: | Electrochemical sensors Nanocomposite-modified electrodes Mesoporous silica Poly(vitamin B1) film 2,4-Dinitrophenol |
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