Electrophoresis deposition of Ag nanoparticles on TiO2 nanotube arrays electrode for hydrogen peroxide sensing

被引:60
|
作者
Jiang, Yanshu [1 ]
Zheng, Baozhan [1 ]
Du, Juan [1 ]
Liu, Guangyue [1 ]
Guo, Yong [1 ]
Xiao, Dan [1 ,2 ]
机构
[1] Sichuan Univ, Coll Chem, Chengdu 610064, Peoples R China
[2] Sichuan Univ, Coll Chem Engn, Chengdu 610065, Peoples R China
基金
中国国家自然科学基金;
关键词
TiO2 nanotube arrays; AgNPs/TiO2NTs; Electrophoretic deposition; Hydrogen peroxide sensor; HYBRID NANOPARTICLES; SILVER NANOPARTICLES; TITANIUM-DIOXIDE; SENSOR; SURFACE; H2O2; FABRICATION; ASSEMBLIES; ROUTE; GOLD;
D O I
10.1016/j.talanta.2013.03.015
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
In this paper, a simple and green strategy, based on the electrophoresis deposition technology, was reported to prepare Ag nanoparticles (NPs) modified TiO2 nanotube arrays (NTs). The morphologies of AgNPs, TiO2NTs and AgNPs/TiO2NTs were characterized by transmission electron microscope (TEM) and scanning electron microscope (SEM). The results demonstrate that the surface of TiO2NTs was homogeneously decorated with AgNPs, of which the morphology could be easily controlled by the electrophoretic deposition (EPD) time. In order to investigate the co-effects of AgNPs and TiO2NTs on the catalysis of H2O2, the electrochemical performances of TiO2 NTs, AgNPs/Ti and AgNPs/TiO2NTs electrodes were investigated in this work. It is found that the response of AgNPs/TiO2NTs electrode to H2O2 was remarkably enhanced due to the co-effects of AgNPs and TiO2NTs. Therefore, it could be used to fabricate H2O2 sensor. The effects of conditions were investigated in detail, such as EPD time, the operating potential, etc.. Under the optimal experimental condition, the sensor had a quick response to H2O2 at -0.12 V with a high sensitivity (184.24 mA.M-1 cm(-2)), wide linear range (0.75 mu M-11.16 mM) and low detection limit (85.6 nM). In addition, the sensor also has good stability and excellent selectivity. The developed H2O2 sensor has been successfully applied to the detection of H2O2 in real samples. This work also demonstrated that the AgNPs/TiO2NTs has potential application in fabricating glucose sensor by immobilizing glucose oxidase onto the prepared electrode. (C) 2013 Elsevier B.V. All rights reserved.
引用
收藏
页码:129 / 135
页数:7
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