Synthesis of silver/multi-walled carbon nanotubes composite and its application for electrocatalytic reduction of bromate

被引：30

作者：

Li, Qin ^{[1
]}

Zhang, Qiu ^{[1
]}

Ding, Liang ^{[1
]}

Zhou, Dandan ^{[1
]}

Cui, Hao ^{[1
]}

Wei, Zhongbo ^{[1
]}

Zhai, Jianping ^{[1
]}

机构：

[1] Nanjing Univ, Sch Environm, State Key Lab Pollut Control & Resource Reuse, Nanjing 210093, Jiangsu, Peoples R China

来源：

CHEMICAL ENGINEERING JOURNAL | 2013年 / 217卷

基金：

高等学校博士学科点专项科研基金;

关键词：

Silver; Multi-walled carbon nanotubes; Electrocatalytic; Bromate; Reduction; ACID; NANOPARTICLES; DISPERSION; OZONATION; ELECTRODE; SENSOR; WATER;

D O I：

10.1016/j.cej.2012.12.005

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The silver nanoparticles decorated multi-walled carbon nanotubes composite (Ag/MWNTs) was prepared and used to fabricate a modified electrode. The composite was examined by transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS). The electrochemical performance of Ag/MWNTs modified glassy carbon electrode (Ag/MWNTs/GCE) was evaluated for electro-catalytic activity towards bromate reduction in buffer solutions by cyclic voltammetry (CV), linear sweep voltammetry (LSV) and multi-potential steps method. The experimental data shows that the silver nanoparticles were well deposited on MWNTs and Ag/MWNTs/GCE exhibit high electrocatalytic activity towards bromate reduction. It is proposed that firstly the bromate ions diffused to the active sites and then the electrochemical reduction occurred. The bromate reduction on Ag/MWNTs/GCE was proved to be an irreversible and diffusion controlled process. Furthermore, Ag/MWNTs/GCE is characterized by good stability and relatively high sensitivity with respect to bromate concentration. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：28 / 33

页数：6

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