碳酸氧铋修饰碳糊电极循环伏安法检测水体中的铜

Determination of copper ions in water by BiO_2CO_3 modified carbon paste electrode using cyclic voltammetry analysis

通过水热法制备了尺寸均一的碳酸氧铋,并以碳酸氧铋修饰的碳糊电极为工作电极,采用循环伏安法检测模拟水样中的铜离子。相较裸碳糊电极,碳酸氧铋修饰碳糊电极显示出了更强的铜离子氧化还原峰。当碳酸氧铋摩尔分数为0.50%时,修饰电极表现出最佳检测性能,且氧化电流与铜离子质量浓度在100～1 000μg/L具有良好的线性关系,检出限达到0.104 8μg/L。

Bismuth subcarbonate with uniform size was prepared by hydrothermal method,and the bismuth subcarbonate modified carbon paste electrode was used as working electrode to detect Cu^2+ in simulated water samples by cyclic voltammetry.The bismuth subcarbonate modified carbon paste electrode showed stronger redox peak of Cu^2+,compared with that of bare carbon paste electrode.When the mole ratio of bismuth subcarbonate was 0.50%,the bismuth subcarbonate modified electrode had highest redox current,and showed a linear detection of Cu^2+ in the concentration ranging from 100 to 1 000 μg/L.The detection limit of Cu^2+ was 0.104 8 μg/L.