基于两种复合纳米材料修饰的电极对多巴胺的催化氧化  

Electrocatalytic Oxidation of Dopamine at Two Types of Composite Nanomaterials Modified Gold Electrode

作　　者：王娜[1] 李献锐[1] 王贝贝[1] 倪瑞星[1] 籍雪平[1] 

机构地区：[1]河北医科大学基础医学院,河北石家庄050017

出　　处：《分析科学学报》2016年第3期357-360,共4页Journal of Analytical Science

基　　金：河北省教育厅科学研究重点项目(No.ZH2012078)

摘　　要：本文先在Au电极表面自组装硫辛酰胺(T-NH_2),再利用电化学还原的方法将还原氧化石墨烯(ERGO)和纳米金(AuNPs)电沉积到T-NH_2表面,采用循环伏安法考察了电极的电化学性能。实验表明,该修饰电极对多巴胺(DA)具有良好的电催化作用,优化条件下,DA的氧化峰电流与其浓度在6.49×10^(-6)~7.62×10^(-3) mol/L范围内呈良好的线性关系(R=0.996),检出限为2.0×10^(-6) mol/L。A novel electrochemical sensor based on a direct electrodeposition of electrochemical reduced graphene oxide（ERGO）-Au nanoparticles（AuNPs）on thioctic acid amide（T-NH2）self-assembled monolayers（SAMs）-modified gold electrode has been developed.The characteristic of the modified electrode was studied by cyclic voltammetry（CV）.The modified electrode exhibited excellent electrocatalytic effect on the redox of dopamine（DA）.At the optimum conditions,the peak currents of dopamine were proportional to the concentrations in the range of 6.49×10-6-7.62×10-3 mol/L with the detection limit of 2.0×10-6 mol/L.

关 键 词：多巴胺 电化学还原氧化石墨烯 纳米金 修饰电极 

分 类 号：O657.1[理学—分析化学]