Abstract

Multilayer flake Ag/Ni(OH)₂ nanostructures are synthesized with a facile hydrothermal reduction method. In the preparation process, N, N-dimethylformamide (DMF) is used as a reducing agent, and polyvinylpyrrolidone (PVP) is used as a surfactant. The effects of several influencing factors such as the concentration of silver nitrate, reaction temperature and reaction time on the crystal phase of the products are characterized by X-ray diffraction (XRD) analysis. The morphology and chemical composition are characterized by Scanning electron microscopy (SEM), Fourier infrared spectroscopy (FTIR), Energy dispersive spectrometer (EDS), and X-ray photoelectron spectroscopy (XPS). In a three-electrode system, the electrocatalytic oxidation activity of Ag/Ni(OH)₂ nanostructures for glucose was tested by cyclic voltammetry (CV) curve, current-time (i-t) responses and electrochemical impedance spectroscopy (EIS). The results show that Ag/Ni(OH)₂ modified glassy carbon electrode (GCE) has better catalytic activity for glucose than the Ni(OH)₂ modified electrode.

摘要

采用简便的水热还原法合成了多层片状 Ag/Ni(OH) _{2纳米结构。}在制备过程中，以N,N-二甲基甲酰胺(DMF)为还原剂，以聚乙烯吡咯烷酮(PVP)为表面活性剂。通过X射线衍射(XRD)分析表征了硝酸银浓度、反应温度和反应时间等几个影响因素对产物晶相的影响。通过扫描电子显微镜 (SEM)、傅里叶红外光谱 (FTIR)、能量色散光谱仪 (EDS) 和 X 射线光电子能谱 (XPS) 对其形貌和化学成分进行了表征。在三电极体系中，Ag/Ni(OH) _{2的电催化氧化活性}通过循环伏安法 (CV) 曲线、电流-时间 (it) 响应和电化学阻抗谱 (EIS) 测试了葡萄糖的纳米结构。结果表明，Ag/Ni(OH) ₂修饰的玻碳电极(GCE)比Ni(OH) ₂修饰电极对葡萄糖具有更好的催化活性。