Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6616821 | Electrochimica Acta | 2013 | 8 Pages |
Abstract
In this paper, ordered mesoporous carbons (OMCs) modified glassy carbon electrode (GCE) (OMCs/GCE) was employed to investigate the electrochemical behavior of o-nitrophenol (o-NP), m-nitrophenol (m-NP) and p-nitrophenol (p-NP) in ambient-N2 phosphate buffer saline. Compared with bare GCE, the OMCs/GCE exhibited obvious electrocatalytic activity towards nitrophenol isomers. The electrochemical reaction mechanism of nitrophenol at the modified electrode was also studied. At OMCs/GCE, the three nitrophenol isomers could be identified and separated successfully and the simultaneous determination was realized by detecting the reduction peaks of their intermediate products (at 0.209 V vs. saturated calomel electrode for p-NP, 0.020 V for m-NP and â0.201 V for o-NP) with differential pulse voltammetry. Under the optimized experimental conditions, the linear ranges of the calibration curves were 2-90 μM for p-NP, 1-100 μM for m-NP and 0.5-90 μM for o-NP with limits of detection of 0.1 μM, 0.06 μM and 0.08 μM for p-NP, m-NP and o-NP, respectively (S/N = 3). Therefore, the proposed method is simple, rapid, stable, sensitive, specific, reproducible and cost-effective, which can be applicable for real samples detection.
Keywords
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Physical Sciences and Engineering
Chemical Engineering
Chemical Engineering (General)
Authors
Tingting Zhang, Qiaolin Lang, Dapeng Yang, Liang Li, Lingxing Zeng, Cheng Zheng, Tie Li, Mingdeng Wei, Aihua Liu,