多壁碳纳米管修饰玻碳电极测定铜离子  

Determination of copper ions by multiwall carbon nanotube modified glassy carbon electrode

作　　者：刘雅琼[1] 陈明明[1] 黄柱进[1] 冯艳龙[1] 高川[1] 董玉林[1] 魏登贵[1] 李曦[1] 

机构地区：[1]武汉理工大学理学院化学系,湖北武汉430070

出　　处：《化学研究与应用》2014年第10期1627-1631,共5页Chemical Research and Application

基　　金：国家自然科学基金项目(51273155)资助;中央高校基本科研业务费专项资金项目(2012-Ia-022)资助;国家大学生创新创业训练计划项目(20121049714011)资助

摘　　要：以多壁碳纳米管（ MWCNTs）修饰玻碳电极为工作电极,采用阳极溶出线性扫描法研究了铜离子的电化学测定方法。探讨了MWCNTs修饰层数、富集电位、富集时间、溶液pH、支持电解质对峰电流的影响。实验表明,铜离子浓度在1．0×10-8~1．0×10-5 mol·L-1范围内与峰电流呈良好的线性关系,检测限为2．0×10-9 mol· L-1,且该电极具有良好的稳定性和抗干扰能力。A glassy carbon electrode modified by multi-walled carbon nanotubes（ MWCNTs） used as working electrode,the electro-chemical determination of copper ions was studied by anodic stripping voltammetry. The effects of amount of MWCNTs,adsorption potential,deposition time,pH value of the detection solution and supporting electrolyte on the electrochemical response of copper i-ons were investigated to obtain the optimal sensitivity. It is found that the peak current is linear with the concentration of Cu2＋in the range of 1×10-8 ~1×10-5 mol·L-1. The detection limit is 2 × 10-9 mol·L-1. The modified electrode also showed good stability and anti-interference ability.

关 键 词：多壁碳纳米管 修饰电极 线性扫描法 阳极溶出 铜离子 

分 类 号：O657.1[理学—分析化学]