Abstract

La-doped ZnO nanorods were successfully synthesized by a solvothermal synthesis route using ethanol as the solvent. The morphologies and composition were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS). A new electrochemical sensor was fabricated based on the as-synthesized nanorods and the electrochemical behaviors of bisphenol A (BPA) on modified carbon paste electrode (CPE) were investigated by electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV). The experimental results confirmed that La-doped ZnO nanorods exhibit excellent electrocatalytic activity toward the oxidation of BPA. By using CV method, a lower detection limit of 0.1 μM (S/N = 3) with the linear calibration curves over the concentration range 0.4∼90 μM were obtained. Besides, the interference experiments and the actual analysis of BPA were performed. The sensor has potential application in the fields of biomedical and environmental science.

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