多壁碳纳米管修饰电极对抗坏血酸的电催化作用  

Electrocatalytic Action of Ascorbic Acid at Modified Glassy Carbon Electrode of Multi-wall Carbon Nanotubes

作　　者：王玉春[1] 李将渊[1] 刘赵荣[1] 

机构地区：[1]西华师范大学化学化工学院,四川南充637002

出　　处：《内江师范学院学报》2005年第2期57-60,共4页Journal of Neijiang Normal University

基　　金：四川省教育厅重点课题项目(2004A106)。

摘　　要：用循环伏安法研究了在不同的电解质溶液及不同扫速下,多壁碳纳米管修饰电极对抗坏血酸(AA)的电催化作用。实验表明在MWCNT电极上,AA的氧化峰电位负移,氧化峰电流显著增加,AA的电极过程呈现扩散控制的特征,且AA浓度在1.0×10-5-5.0×10-1moL·dm-3范围内,其浓度与峰电流有良好的线性关系,检测下限达1.0×10-6moL·dm-3,一些常见物质对其测定无干扰。Researching into electrocatalytic action of AA at modified glassy carbon electrode of multi-wall carbon nanotubes by using cyclic voltammetry in buffer solution of different pH values and at different scan rates. Anodic peak potential of AA is negative change, and anodic peak current of AA increases obviously at the modified electrode, oxidation process of AA is the process of diffusing domination. The anodic peak current is proportional to the AA content ration in the range of 1.0×10^(-5)-5.0×10^(-1)moL·dm^(-3),and the detect limit can reach 1.0×10^(-6)moL·dm^(-3).Some common matter doesn't effect determination of AA.

关 键 词：多壁碳纳米管 抗坏血酸 修饰电极 电化学催化 循环伏安法 

分 类 号：O642[理学—物理化学]