Wang Yan, Zhang Sai, Bai Wushuang, Zheng Jianbin
Institute of Analytical Science, Shaanxi Provincial Key Laboratory of Electroanalytical Chemistry, Northwest University, Xi'an, Shaanxi 710069, China; College of Pharmacy, Xi'an Medical University, Xi'an, Shaanxi 710021, PR China.
Institute of Analytical Science, Shaanxi Provincial Key Laboratory of Electroanalytical Chemistry, Northwest University, Xi'an, Shaanxi 710069, China.
Talanta. 2016;149:211-216. doi: 10.1016/j.talanta.2015.11.040. Epub 2015 Nov 17.
A nonenzymatic glucose sensor based on Cu/MnO2/MWCNTs nanocomposite modified glass carbon electrode was fabricated by an electrochemical method. Transmission electron microscopic (TEM) measurement showed that MnO2 in the nanocomposite held a nanostructure of three-dimension (3D) spheres assembled by many densely arranged nanosheets. The electrocatalytic activity of the present sensor toward the oxidation of glucose was investigated by amperometry. The current response was linearly related to glucose concentration in a range from 6.4×10(-7)-2.0×10(-3)molL(-1) with a sensitivity of 494μA mM(-1)cm(-2) and a correlation coefficient of 0.9990, and another range from 10 to 1000μM with a sensitivity of 1302μA mM(-1)cm(-2) and a correlation coefficient of 0.9990. The detection limit was estimated to be 0.17μM at a signal-to-noise ratio of 3, and the response time was found to be 3s.
采用电化学方法制备了基于Cu/MnO₂/MWCNTs纳米复合材料修饰玻碳电极的非酶葡萄糖传感器。透射电子显微镜（TEM）测量表明，纳米复合材料中的MnO₂具有由许多密集排列的纳米片组装而成的三维（3D）球体纳米结构。通过安培法研究了该传感器对葡萄糖氧化的电催化活性。电流响应与葡萄糖浓度在6.4×10⁻⁷ - 2.0×10⁻³molL⁻¹范围内呈线性关系，灵敏度为494μA mM⁻¹cm⁻²，相关系数为0.9990，在另一个10至1000μM范围内，灵敏度为1302μA mM⁻¹cm⁻²，相关系数为0.9990。在信噪比为3时，检测限估计为0.17μM，响应时间为3秒。
