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

页码：3423 / 3430

页数：8

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