A facile strategy to fabricate Au/TiO2 nanotubes photoelectrode with excellent photoelectrocatalytic properties

被引：51

作者：

Zhang, Guowei ^{[1
]}

Miao, Hui ^{[1
]}

Hu, Xiaoyun ^{[1
]}

Mu, Jianglong ^{[1
]}

Liu, Xixi ^{[1
]}

Han, Tongxin ^{[1
]}

Fan, Jun ^{[2
]}

Liu, Enzhou ^{[2
]}

Yin, Yunchao ^{[2
]}

Wan, Jun ^{[2
]}

机构：

[1] Northwest Univ, Sch Phys, Xian 710069, Shaanxi, Peoples R China

[2] Northwest Univ, Sch Chem Engn, Xian 710069, Shaanxi, Peoples R China

来源：

APPLIED SURFACE SCIENCE | 2017年 / 391卷

基金：

中国国家自然科学基金; 高等学校博士学科点专项科研基金;

关键词：

TiO2 nanotubes electrode; Gold nanoparticles; Surface sensitization; Photoelectrocatalytic activity; PHOTOCATALYTIC CO2 REDUCTION; ANATASE TIO2 NANOCRYSTALS; HYDROGEN GENERATION; DOPED TIO2; ARRAYS; WATER; DEGRADATION; NANOPARTICLES; DICLOFENAC; CDS;

D O I：

10.1016/j.apsusc.2016.03.042

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：

Highly ordered titanium dioxide nanotubes (TiO2 NTs) were prepared by a low-temperature hydrothermal process with Ti sheet as precursor in NaOH solutions. Gold nanoparticles (Au NPs) were then deposited on the surface of TiO2 NTs by a microwave-assisted chemical reduction route. The investigation reveal that the Au NPs are well dispersed on the surface of TiO2 NTs in metallic state, and Au NPs can effectively promote the separation of photogenerated electron-hole pairs. Besides, Au NPs also can enhance the visible light absorption of TiO2 NTs due to their localized surface plasmon resonance (LSPR) effect. The experimental results indicate that 0.5 Au/TiO2 NTs film with an photocurrent of 19.0 mu A/cm(2) exhibits the highest photoelectrocatalytic (PEC) activity, when under a low bias of 0.5 V, in the degradation of methylene blue (MB). Additionally, the mechanism for the enhanced PEC performance of Au/TiO2 NTs is preliminarily discussed. The Au NPs decorated TiO2 NTs displayed a more effective separation of photo generated electron-hole pairs. The enhanced visible light absorption was owning to the Au NPs localized surface plasmon resonance (LSPR) effect. Finally, the mechanism for the enhanced PEC performance of Au/TiO2 NTs was also proposed. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：345 / 352

页数：8

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