Abstract A novel poly vinyl alcohol supported cupric oxide nanocomposite (CuO/PVA) modified glassy carbon electrode (GCE) was developed for determination of mercury (II) ions by electrochemical methods. The CuO/PVA nanocomposite was synthesized by sonochemical method and characterized by spectral, analytical and electrochemical methods. Interestingly, cyclic voltammetry results exhibited that excellent electrocatalytic activity and improved sensitivity for the determination of Hg2+ ions bare to bare GCE under the optimized conditions. The CuO/PVA nanocomposite modified GCE for Hg2+ ion detection was provided a wide linear response range (10–70 μM) of response and lower detection limit (0.42 nM) respectively. The CuO/PVA/GCE showed good selectivity towards Hg2+ ion detection even in the presence of interferents such as arsenic, cadmium, lead, chromium and nickel. The proposed fabricated CuO/PVA/GCE sensor was exhibited good reproducibility for the selective determination of mercury in river and tap water and obtained good recovery results.

中文翻译：

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氧化铜/聚乙烯醇纳米复合材料修饰玻碳电极中汞(II)离子的电化学行为及伏安法测定

摘要 开发了一种新型的聚乙烯醇负载氧化铜纳米复合材料 (CuO/PVA) 修饰的玻碳电极 (GCE)，用于通过电化学方法测定汞 (II) 离子。CuO/PVA 纳米复合材料是通过声化学方法合成的，并通过光谱、分析和电化学方法进行表征。有趣的是，循环伏安法结果表明，在优化条件下，对于裸 GCE 到裸 GCE 的 Hg2+ 离子测定具有优异的电催化活性和更高的灵敏度。用于 Hg2+ 离子检测的 CuO/PVA 纳米复合材料改性 GCE 分别提供了宽的线性响应范围 (10–70 μM) 和检测下限 (0.42 nM)。即使在砷、镉、铅、铬和镍。所提出的制备的 CuO/PVA/GCE 传感器在选择性测定河流和自来水中的汞方面表现出良好的重现性，并获得了良好的回收率。