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.
出处
《浙江师范大学学报（自然科学版）》
CAS
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)
关键词
单壁碳纳米管
色氨酸
电催化
氧化
循环伏安法
single-walled carbon nanotubes
tryptophan
electrocatalysis
oxidation
cyclic vohammetry
