Facile synthesis of tungsten oxide - Bismuth vanadate nanoflakes as photoanode material for solar water splitting

被引：49
作者：
Ibrahim, Akram A. M. [1 ,2 ]
Khan, Ibrahim [1 ,2 ]
Iqbal, Naseer [1 ]
Qurashi, Ahsanullhaq [1 ,2 ]
机构：
[1] King Fahd Univ Petr & Minerals, Ctr Res Excellence Nanotechnol, Dhahran 31261, Saudi Arabia
[2] King Fahd Univ Petr & Minerals, Dept Chem, Dhahran 31261, Saudi Arabia
来源：
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2017年 / 42卷 / 05期
关键词：
WO3; WO3/BiVO4; heterojunctions; nanoflakes; Solar water splitting; PHOTOCATALYTIC ACTIVITY; CHARGE SEPARATION; NANOTUBE ARRAYS; HYDROGEN; PHOTOELECTROLYSIS; MORPHOLOGY; COMPOSITE; OXIDATION; FILMS; WO3;
D O I：
10.1016/j.ijhydene.2016.09.095
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：
This research article describes the synthesis of hetero-structured WO3/BiVO4 nanoflakes as photoanode material for photoelectrochemical water splitting. The heterojunction WO3/BiVO4 nanoflakes developed by facile hydrothermal method. WO3/BiVO4 uniform films fabricated simply by drop casting technique onto indium oxide tin oxide (ITO) coated glass substrates. Detailed morphological, structural and compositional characterization of WO3/BiVO4 carried out by XRD, FE-SEM, and EDX techniques. Optical properties studied by Raman and UV-VIS spectroscopy, respectively. The band gap energy of WO3/BiVO4 hetero-junction estimated to be about 2.00 eV. These WO3/BiVO4 heterojunction structures offered enhanced photo-conversion efficiency and increased photo-corrosion stability. In addition, these nanoflakes films showed significantly enhanced photo-electrochemical properties due to their high surface-area and enhanced separation of the photo-generated charge at the WO3/BiVO4 interface. The effect of calcination temperature on WO3/BiVO4 also investigated. (C) 2016 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：3423 / 3430
页数：8
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