Application of multi-walled carbon nanotubes/Nafion composite film in electrochemical determination of Pb2+

被引：32

作者：

Xie, Xiafeng ^{[1
,3
]}

Gan, Tian ^{[1
,2
]}

Sun, Dong ^{[1
,3
]}

Wu, Kangbing ^{[1
]}

机构：

[1] Huazhong Univ Sci & Technol, Dept Chem, Wuhan 430074, Peoples R China

[2] Hubei Inst Nationalities, Key Lab Biol Resources Protect & Utilizat Hubei P, Enshi, Peoples R China

[3] Wenzhou Med Coll, Sch Pharm, Wenzhou, Peoples R China

来源：

FULLERENES NANOTUBES AND CARBON NANOSTRUCTURES | 2008年 / 16卷 / 02期

基金：

中国国家自然科学基金;

关键词：

carbon nanotube; Nafion; electrochemistry; Pb2+; determination;

D O I：

10.1080/15363830801887935

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In this work, insoluble multi-walled carbon nanotubes (MWNTs) was dispersed into ethanol in the presence of 1% Nafion, resulting in a stable and well-distributed MWNTs/Nafion suspension characterized by TEM and particle size analyzer. After evaporation of ethanol, a uniform MWNTs/Nafion composite film-coated glassy carbon electrode (GCE) was prepared and then characterized with SEM. Furthermore, the electrochemical behavior of Pb2+ at the unmodified GCE, Nafion film-modified GCE and MWNTs/Nafion film-modified GCE was investigated. It was found that the reduction peak potential shifts positively and peak current remarkably increases at the MWNTs/Nafion film-modified GCE, suggesting that MWMTs/Nafion film-modified GCE exhibits catalytic ability to electrochemical reduction of Pb2+. Based on this, a sensitive and convenient electrochemical method was proposed for the determination of Pb2+. Finally, the MWMTs/Nafion film-modified GCE was successfully used to detect Pb2+ in a water sample.

引用

页码：103 / 113

页数：11

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