Bi2O3 cocatalyst improving photocatalytic hydrogen evolution performance of TiO2

被引：122

作者：

Xu, Difa ^{[1
]}

Hai, Yang ^{[1
]}

Zhang, Xiangchao ^{[1
]}

Zhang, Shiying ^{[1
]}

He, Rongan ^{[1
]}

机构：

[1] Changsha Univ, Hunan Key Lab Appl Environm Photocatalysis, Changsha 410022, Hunan, Peoples R China

来源：

APPLIED SURFACE SCIENCE | 2017年 / 400卷

基金：

中国国家自然科学基金;

关键词：

TiO2; Bi2O3 quantum dots; Impregnation-calcination method; Hydrogen evolution; Charge carrier mechanisms; FERMI-LEVEL EQUILIBRATION; CO-DOPED TIO2; QUANTUM DOTS; 001; FACETS; DEGRADATION; GENERATION; BISMUTH; WATER; BI; SEMICONDUCTORS;

D O I：

10.1016/j.apsusc.2016.12.171

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：

Photocatalytic hydrogen production using water splitting is of potential importance from the viewpoint of renewable energy development. Herein, Bi2O3-TiO2 composite photocatalysts presented as Bi-Bi2O3-anatase-rutile TiO2 multijunction were first fabricated by a simple impregnation-calcination method using Bi2O3 as H-2-production cocatalysts. The obtained multijunction samples exhibit an obvious enhancement in photocatalytic H-2 evolution activity in the presence of glycerol. The effect of Bi2O3 amount on H-2-evolution activity of TiO2 was investigated and the optimal Bi2O3 content was found to be 0.89 mol%, achieving a H-2-production rate of 920 p.mol h(-1), exceeding that of pure TiO2 by more than 73 times. The enhanced mechanism of photocatalytic H-2 -evolution activity is proposed. This study will provide new insight into the design and fabrication of TiO2-based hydrogen-production photocatalysts using low-cost Bi2O3 as cocatalyst. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：530 / 536

页数：7

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