太原理工大学学报

2019, v.50;No.225(05) 587-591

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枝晶纳米银的电化学葡萄糖检测
Nano-branched Silver Dendrites for Electrochemical Detection of Glucose

刘玲;禚凯;
LIU Ling;ZHUO Kai;College of Information and Computer,Taiyuan University of Technology;Micro Nano System Research Center,Taiyuan University of Technology;Key Lab of Advanced Transducers and Intelligent Control System of the Ministry of Education,Taiyuan University of Technology;

摘要(Abstract):

报道了在纯硝酸银溶液中通过电沉积方法制备枝晶结构的纳米银(Dendritic silver powders)修饰玻碳电极用以电化学检测葡萄糖的方法。通过场发射扫描电子显微镜(FESEM)对合成的银进行了结构形貌的表征,并且分别采用循环伏安法(CV)和交流阻抗(EIS)进行了进一步的电化学表征,结果表明,枝晶结构的纳米银具有良好的电化学特性。通过选择合适的沉积条件,在铜网上进行恒电位沉积,形成枝晶纳米银结构,超声将其震落以修饰玻碳电极用于葡萄糖的检测。采用计时电流法对葡萄糖进行检测,最佳条件下的检测限为3.0×10~(-7) mol/L(3倍信噪比).该非酶葡萄糖传感器具有检测限度低﹑灵敏度高﹑成本低等优点,有良好的应用前景。
This paper reports that dendritic nano-silver was fabricated on copper wire mesh by electro-deposition in pure AgNO_3 solution, the glassy carbon electrode modified by dendritic nano-silver as an electrochemical way was used for the detection of glucose. The morphology of the syntheszed silver was characterized by Field Emission Scanning Electron Microscopy(FE-SEM), and electrochemical characteristics were analyzed by cyclic voltammetry(CV) and electrochemical impedance spectroscopy(EIS).The results manifest that the dendritic nano-silver had excellent electrochemical properties. It was obtained on the copper network by selecting suitable deposition conditions, and then shaken down by ultrasonic vibration to modify the glassy carbon electrode for detection of glucose by chromoamperomety. The detection limit was 3.0×10~(-7) mol/L under the optimal conditions. This non-enzymatic glucose sensor has low detection limit, high sensitivity and low cost, which make it a promising material in application.

关键词(KeyWords): 电化学;枝晶纳米银;电沉积;计时电流法;葡萄糖
electrochemical;dendritic nano-silver;electro-deposition;chronoamperometry;glucose

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基金项目(Foundation): 国家自然科学基金资助项目(61471255,51622507,61474079,61703298,51705354);; 山西青年基础研究项目(201701D221110,2015021092)

作者(Author): 刘玲;禚凯;
LIU Ling;ZHUO Kai;College of Information and Computer,Taiyuan University of Technology;Micro Nano System Research Center,Taiyuan University of Technology;Key Lab of Advanced Transducers and Intelligent Control System of the Ministry of Education,Taiyuan University of Technology;

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