电化学方法制备石墨烯-铁氰化镍复合物及对抗坏血酸的电催化氧化研究  

Electrocatalytic oxidation of ascorbic acid on a nickel hexacyanoferrate nanoparticles /graphene film modified glassy carbon electrode

作　　者：陈体伟[1] 余小娜[1] 王淑贤[1] 张建立[1] 

机构地区：[1]许昌学院化学化工学院,河南省微纳米能量储存与转换材料重点实验室,许昌461000

出　　处：《分析试验室》2014年第6期709-712,共4页Chinese Journal of Analysis Laboratory

基　　金：许昌学院校内科研基金项目(2013069)资助

摘　　要：采用电化学还原方法制备了铁氰化镍-石墨烯复合薄膜电极,扫描电子显微镜（SEM）表征电还原石墨烯和铁氰化镍-石墨烯复合材料的表面形貌。采用循环伏安和计时电流技术研究了该修饰电极对抗坏血酸（AA）的电催化氧化性能,据此建立了一种测定AA的电化学分析新方法。由于石墨烯和铁氰化镍纳米颗粒之间的协同效应,使得该复合修饰电极对抗坏血酸具有优异的电催化活性。在0.1 mol/L pH 7.00的PBS溶液中,抗坏血酸的催化氧化电流与其浓度在1.0×10-4～7.0×10^-4mol/L范围内呈良好的线性关系,检出限为3.1×10^-5mol/L（S/N）。A novel nickel hexacyanoferrate （NiHCF） nanoparticles/electrochemicaUy reduced graphene hybncl films modified glassy carbon electrode was prepared by cyclic voltammetric electrodeposition technique. Scanning electron microscope （SEM） was used to characterize the surface morphologies of the electrochemically reduced graphene （ER-G） and NiHCF nanoparticles/ER-G films. The electrocatalytic oxidation performance of ascorbic acid （AA） on this modified electrode was investigated by cyclic voltammetry and chronoamperometry. A directly electroanalytical method for the determination of ascorbic acid was developed. Experimental results demonstrated that the NiHCF/ER-G modified electrode exhibited excellent electrocatalytic activity toward AA because of thesynergistic effect between NiHCF nanoparticles and ER-G films. The oxidation peak current was linear in the concentration range of AA from 1.0×10^-4 to 7.0×10^-4 mol/L with a correlation coefficient of 0. 9995 and a detection limit of 3.1 × 10^-5 mol/L （S/N）.

关 键 词：石墨烯 铁氰化镍纳米颗粒 抗坏血酸 电催化氧化 

分 类 号：O657.1[理学—分析化学]