Ag-石墨烯的制备及修饰电极对对苯二酚的电催化氧化

发布时间：2018-03-26 04:13

本文选题：石墨烯　切入点：银纳米颗粒　出处：《环境工程学报》2016年04期

【摘要】：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。
[Abstract]:Using graphite as raw material, a modified Hummers method was used to prepare graphite oxide, and glucose was used as reducing agent. Ag-graphene Ag-Grn nanocomposites were prepared by one-step reduction method. The structure and morphology of the composites were characterized by means of X-ray diffractometer, scanning electron microscope (SEM) and thermogravimetric analysis (TGA). The electrochemical properties of the composites were investigated by cyclic voltammetry. The results showed that graphite oxide and silver ions lost some oxygen-containing functional groups under the action of glucose. The silver ions were reduced to silver nanoparticles and distributed uniformly on the surface of graphene lamellae. Ag-graphene modified glassy carbon electrode has good electrocatalytic oxidation of hydroquinone when pH value is 7.0 mg/m / L and the concentration of graphene is 2.5 mg/m / L.
【作者单位】：河西学院化学化工学院甘肃省河西走廊特色资源利用重点实验室;
【基金】：甘肃省河西走廊特色资源利用重点实验室面上项目(XZ1402) 甘肃省高等学校科研项目(2014B-087) 河西学院青年基金项目(QN2013-05)
【分类号】：TB33;X703

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