基于氧化锌@金纳米复合材料/玻碳电极电化学传感器检测双酚A

Detection of bisphenol A based on zinc oxide@gold nanocomposites/glassy carbon electrode electrochemical sensor

中文关键词:  双酚A  电化学传感器  氧化锌纳米材料  金纳米粒子

英文关键词:bisphenol A  electrochemical sensor  zinc oxide nanomaterials  gold nanoparticles

中文摘要:

      目的 制备氧化锌@金纳米复合材料/玻碳电极(zinc oxide@gold nanocomposites/glassy carbon electrode, ZnO@Au/GCE)电化学传感器对双酚A进行检测分析。方法 合成了氧化锌纳米花(zinc oxide nano flower, ZnO)并在ZnO上面生长纳米金(gold nanocomposites, Au)制备了新型的ZnO@Au纳米复合材料。以ZnO@Au为修饰材料, 采用玻碳电极(glassy carbon electrode, GCE)构建了ZnO@Au/GCE传感器。通过对缓冲液、ZnO@Au修饰量的优化, 确定ZnO@Au/GCE的最佳工作条件, 对双酚A进行检测分析。结果 ZnO@Au不仅导电性、稳定性好而且具有良好的催化性, 可有效提高ZnO@Au/GCE的灵敏度。双酚A浓度与氧化峰电流分别在0.05~1.00 μmol/L和1.0~240.0 μmol/L范围内呈线性关系, 检出限(S/N=3)为0.021 μmol/L, 加标检测结果与高效液相色谱法一致, 且该传感器重复性、稳定性较好, 对常见干扰物有良好的抗干扰能力。结论 ZnO@Au/GCE操作简便、快捷且准确度高, 可用于双酚A的快速定量分析。

英文摘要:

      Objective To prepare zinc oxide@gold nanocomposites/glassy carbon electrode (ZnO@Au/GCE) electrochemical sensor for the detection and analysis of bisphenol A. Methods Zinc oxide nano flower (ZnO) was synthesized and gold nanocomposites (Au) were grown on ZnO to prepare a new type of ZnO@Au nanocomposites. ZnO@Au/GCE sensor was constructed using ZnO@Au and glassy carbon electrode (GCE). Optimum working conditions were determined by optimizing the buffer and ZnO@Au for the detection and analysis of bisphenol A. Results ZnO@Au not only had good conductivity and stability, but also had good catalysis, which could effectively improve the sensitivity of ZnO@Au/GCE. The sensor exhibited linear relationships between bisphenol A concentration and oxidation peak current from 0.05 to 1.00 μmol/L and from 1.0 to 240.0 μmol/L, the limit of detection was 0.021 μmol/L (S/N=3), the results of spiked detection were consistent with those of high performance liquid chromatography and the sensor had good repeatabilities, stabilities, and had good anti-interference abilities to common interferents. Conclusion ZnO@Au/GCE is simple, rapid, accurate, and can be used for rapid quantitative analysis of bisphenol A.