Immobilization of redox mediators on functionalized carbon nanotube: A material for chemical sensor fabrication and amperometric determination of hydrogen peroxide

被引：5

作者：

Jeykumari, DRS ^{[1
]}

Kumar, SS ^{[1
]}

Narayanan, SS ^{[1
]}

机构：

[1] Univ Madras, Dept Analyt Chem, Madras 600025, Tamil Nadu, India

来源：

PRAMANA-JOURNAL OF PHYSICS | 2005年 / 65卷 / 04期

关键词：

immobilization; functionalized; single-walled carbon nanotube; chemical sensor; determination; hydrogen peroxide;

D O I：

10.1007/BF03010461

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Chemical functionalization of single-walled carbon nanotubes with redox mediators, namely, toluidine blue and thionin have been carried out and the performance of graphite electrode modified with functionalized carbon nanotubes is described. Mechanical immobilization of functionalized single-walled nanotube (SWNT) on graphite electrode was achieved by gently rubbing the electrode surface on carbon nanotubes supported on a glass slide. The electrochemical behaviour of the modified electrodes was investigated by cyclic voltammetry. The SWNT-modified electrodes showed excellent electrocatalytic effect for the reduction of hydrogen peroxide. A decrease in overvoltage was observed as well as an enhanced peak current compared to a bare graphite electrode for the reduction of hydrogen peroxide. The catalytic current was found to be directly proportional to the amount of hydrogen peroxide taken.

引用

页码：731 / 738

页数：8

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