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采用化学合成法制备了铁氰化镍纳米颗粒,并将其与热还原石墨烯机械混合从而合成了铁氰化镍-石墨烯复合材料。在扫描电镜和透射电镜上对合成的复合材料进行形貌结构表征。利用循环伏安和计时电流测试技术对石墨烯复合物的电化学性能进行了探讨。复合物修饰电极对多巴胺具有优异的电催化活性。在较宽的浓度区间,多巴胺的响应电流与多巴胺浓度呈较好的线性关系。该电极材料有望用作多巴胺等药物小分子的灵敏检测。
The nickel ferrocyanide nanoparticles were prepared by chemical synthesis and mechanically mixed with the thermally reduced graphene to synthesize a nickel ferricyanide-graphene composite. The morphology of the composites was characterized by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The electrochemical properties of graphene composites were investigated by cyclic voltammetry and chronoamperometry. The composite modified electrode has excellent electrocatalytic activity on dopamine. In a wide range of concentrations, dopamine response current and dopamine concentration showed a good linear relationship. The electrode material is expected to be used as a sensitive detection of small molecules such as dopamine drugs.