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

被引：31
|
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
收藏
页码：103 / 113
页数：11
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