论文部分内容阅读
以石墨为原料,用改进的Hummers法制备了氧化石墨(GO),以葡萄糖为还原剂,采用一步还原法制备了Ag-石墨烯(Ag-Gr)纳米复合材料。采用X射线衍射仪(XRD)、扫描电子显微镜(SEM)、热重分析(TGA)等手段对复合材料的结构及形貌进行了表征,并用循环伏安法考察了复合材料的电化学性能。结果表明:氧化石墨和银离子在葡萄糖的作用下,氧化石墨失去部分含氧官能团,被还原为石墨烯(Gr),银离子被还原为银纳米颗粒,均匀分布在石墨烯片层表面;在p H值为7.0,Ag-石墨烯浓度为2.5 mg/m L时,Ag-石墨烯修饰玻碳电极对对苯二酚具有良好的电催化氧化作用。
Using graphite as raw material, graphite oxide (GO) was prepared by modified Hummers method and Ag-graphene (Ag-Gr) nanocomposite was prepared by one-step reduction method using glucose as reducing agent. The structure and morphology of the composites were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and thermal gravimetric analysis (TGA). The electrochemical properties of the composites were investigated by cyclic voltammetry. The results show that graphite oxide and silver ion lose part of oxygen-containing functional groups under the action of glucose, and are reduced to graphene (Gr). The silver ions are reduced to silver nanoparticles and uniformly distributed on the surface of the graphene sheet. The Ag-graphene modified glassy carbon electrode has good electrocatalytic oxidation of hydroquinone at p H of 7.0 and Ag-graphene concentration of 2.5 mg / m L.