Photoelectrochemical and photocatalytic properties of Ag-loaded BaTiO3/TiO2 heterostructure nanotube arrays

被引：35

作者：

Li, Qiuye ^{[1
]}

Li, Rui ^{[1
]}

Zong, Lanlan ^{[1
]}

He, Jiehong ^{[1
]}

Wang, Xiaodong ^{[1
]}

Yang, Jianjun ^{[1
]}

机构：

[1] Henan Univ, Key Lab Special Funct Mat, Kaifeng 475004, Peoples R China

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2013年 / 38卷 / 29期

基金：

中国国家自然科学基金;

关键词：

BaTiO3/TiO2; heterojunction; Ag loading photoelectrochemistry; Photocatalysis; THIN-FILMS; TIO2; NANOPARTICLES; DEGRADATION; TITANATE;

D O I：

10.1016/j.ijhydene.2013.04.073

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：

BaTiO3/TiO2 (BT) heterostructure nanotube arrays were fabricated by in situ hydrothermal method using TiO2 nanotubes as both template and reactant. Compared with pure TiO2 nanotube arrays, the BT heterostructures exhibited enhanced photocurrent under UV light irradiation. For further improving the photoelectrochemical performance, Ag nanoparticles were loaded on the surface of BT heterostructure by two different photo-reduction (Ag/BT-P) and chemical reduction (Ag/BT-C) methods. The results showed that the Ag nanoparticles on Ag/BT-C were uniform and dispersed homogeneously, but the Ag nanoparticles on Ag/BT-P were very large, which resulted in the tailored and integrated nanotube structure destroyed. The electrochemical impedance spectra (EIS) indicated that the impedance arc radius of Ag/BT-C was much smaller than Ag/BT-P and the pure BT nanotube arrays, indicating that the enhanced charge carrier separation was achieved on Ag/BT-C. In addition, the Ag/BT-C nanotube arrays exhibited a higher photocatalytic activity for methylene blue (MB) degradation. Copyright (C) 2013, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.

引用

页码：12977 / 12983

页数：7

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