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Electrochemical oxidation determination and voltammetric behaviour of 4-nitrophenol based on Cu2O nanoparticles modified glassy carbon electrode

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Cu2O nanoparticles (nano-Cu2O) modified glassy carbon electrode (GCE) was fabricated and used to investigate the electrochemical behaviour of 4-nitrophenol (4-NP) by cyclic voltammetry (CV), chronoamperometry (CA), chronocoulometry (CC) and differential pulse voltammetry (DPV). Compared with GCE, a remarkable increase in oxidation peak current was observed. It indicates that nano-Cu2O exhibits remarkable enhancement effect on the electrochemical oxidation of 4-NP. Under the optimised experimental conditions, the oxidation peak currents were propotional to 4-NP concentration in the range from 1.0 × 10−6 to 4.0 × 10−4 mol L−1 with a detection limit of 5.0 × 10−7 mol L−1 (S/N = 3). The fabricated electrode presented good repeatability, stability and anti-interference. Finally, the proposed method was applied to determine 4-NP in water samples. The recoveries for these samples were from 94.60% to 105.5%.
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Keywords: 4-Nitrophenol; Cu2O nanoparticles; determination; electrochemical oxidation; glassy carbon electrode

Document Type: Research Article

Affiliations: 1: College of Chemistry and Material Science, Shandong Agricultural University, Taian,271018, Shandong, PR China 2: College of Life Science, Beijing Normal University, 100875Beijing, China 3: College of Resources and Environment, Shandong Agricultural University, Taian,271018, Shandong, PR China 4: School of Chemistry and Chemical Engineering, Liaoning Normal University, Dalian,116029, Liaoning, PR China

Publication date: May 15, 2012

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