单壁碳纳米管修饰电极对色氨酸的电催化氧化  

Electrocatalytic oxidation of tryptophan at a glassy carbon electrode modified with single-walled carbon nanotubes

作　　者：翁雪香[1] 郑孝华[1] 

机构地区：[1]浙江师范大学化学与生命科学学院,浙江金华321004

出　　处：《浙江师范大学学报（自然科学版）》2007年第3期314-318,共5页Journal of Zhejiang Normal University:Natural Sciences

基　　金：浙江师范大学青年基金资助项目(XQN2005010)

摘　　要：采用单壁碳纳米管修饰的玻碳电极对色氨酸的电极行为进行了研究，在0．1mol·L^-1。邻苯二甲酸氢钾-盐酸缓冲溶液（pH2．5）中，发现该修饰电极对色氨酸有明显的电催化作用，色氨酸浓度为1．2×10^-6～3．0×10^-4mol·L^-1时峰电流与色氨酸浓度呈线性关系，检测限为2．5×10^-7mol·L^-1．同时，对色氨酸的氧化机理进行了考察，结果表明此反应过程是一个涉及2个电子转移和2个质子转移的吸附控制过程．The vohammetric behavior of tryptophan was studied at a glassy carbon electrode modified with single-walled carbon nanotubes （SWNT）. In 0.1 mol · L^-1 C6H4CO2HCO2K-HC1 buffer solution （ pH 2.5 ）, the SWNT-modified electrode showed high electrocatalytic activity toward oxidation of tryptophan. The peak current increases linearly with the concentration of tryptophan in the range of 1.2 × 10^-6 - 3.0 × 10^-4 mol · L^-1. The detection limit was 2.5 × 10^-7 mol · L^-1. The results indicated that two-electron and two-proton transfer were involved in the electrode reaction process.

关 键 词：单壁碳纳米管 色氨酸 电催化 氧化 循环伏安法 

分 类 号：O65[理学—分析化学]