羧基化石墨烯修饰玻碳电极对多巴胺电催化性能影响的研究  

Voltammetric Determination of Dopamine with Carbonylated Graphene Modified Glassy Carbon Electrode

作　　者：同元辉[1] 郭宪厚[1] 焦翠玲[1] 王学亮[2] 郁章玉[1,2] 

机构地区：[1]曲阜师范大学化学与化工学院,山东曲阜273165 [2]菏泽学院,山东菏泽274015

出　　处：《菏泽学院学报》2012年第2期56-59,75,共5页Journal of Heze University

基　　金：山东省自然科学基金资助项目(ZR2009BM003)

摘　　要：在玻碳电极表面修饰上羧基化石墨烯制得羧基化石墨烯修饰电极,以此电极为工作电极,研究了多巴胺在此电极上的电化学行为.在pH=3.0的Na2HPO4-C6H8O7缓冲溶液中,氧化峰电流与多巴胺浓度在1.4×10-3～1.8×10-4 mol/L的范围内呈良好的线性关系,检出限为5.0×10-6 mol/L.实验结果表明,玻碳电极经羧基化石墨烯修饰后对多巴胺具有明显的电催化作用,灵敏度明显提高.Carbonylated graphene was used to modify glassy carbon electrode surface to prepare carhonylated graphene modified glassy carbon electrode, and the electrochemical behaviors of dopamine were studied on this mod- ified electrode. The experimental parameters such as the supporting electrolyte, buffer pH, the accumulation poten- tial and time, were optimized in detailed. The results showed that the oxidation peak currents varied linearly with the concentration of DA in the range froinl. 4 ×10^-3 mol/L to 1.8 ×10^-4mol/L and the detection limit was 5.0 ×10^-6mol/L, in pH =3.0 phosphate buffer solution.

关 键 词：羧基化石墨烯 玻碳电极 多巴胺 电催化性能 

分 类 号：O646[理学—物理化学]