Construction of Bi2WO6 homojunction via QDs self-decoration and its improved separation efficiency of charge carriers and photocatalytic ability

被引：87

作者：

Li, Chunmei ^{[1
]}

Chen, Gang ^{[1
]}

Sun, Jingxue ^{[1
]}

Dong, Hongjun ^{[1
,2
]}

Wang, Yu ^{[1
]}

Lv, Chade ^{[1
]}

机构：

[1] Harbin Inst Technol, Dept Chem, Harbin 150001, Peoples R China

[2] Baicheng Normal Univ, Dept Chem, Baicheng 137000, Peoples R China

来源：

APPLIED CATALYSIS B-ENVIRONMENTAL | 2014年 / 160卷

基金：

中国国家自然科学基金;

关键词：

Homojunction; QDs self-decoration; Crystal growth mechanism; Charge separation behavior; Photodegradation mechanism; VISIBLE-LIGHT IRRADIATION; QUANTUM CONFINEMENT; HYDROTHERMAL SYNTHESIS; HYDROGEN GENERATION; TIO2; NANOPARTICLES; CDSE NANOCRYSTALS; PARTICLE-SIZE; SOLAR-CELLS; DEGRADATION; GRAPHENE;

D O I：

10.1016/j.apcatb.2014.05.041

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：

The Bi2WO6 homojunction is successfully synthetized via simple adjusting the amount of raw materials within a transitory hydrothermal reaction of 2 h. Such unique homojunction is constructed through the overgrowth of QDs on the nanoflake unit surfaces of the Bi2WO6 hierarchical structure, which alters the optical absorption property of the samples owing to quantum effect. Photocurrent responses and PL spectra indicate Bi2WO6 homojunction can effectively separate electron-hole pairs and suppress their recombination. The as-prepared samples show the higher efficiency for the photocatalytic degradation of the typical RhB dye compared with the previous reported hierarchical structured Bi2WO6 under visible light. This work provides a new strategy for improving photodegradation activity of Bi2WO6 photocatalyst. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：383 / 389

页数：7

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