Preparation of well-aligned WO3 nanoflake arrays vertically grown on tungsten substrate as photoanode for photoelectrochemical water splitting

被引：53

作者：

Chen, Quanpeng ^{[1
]}

Li, Jinhua ^{[1
]}

Zhou, Baoxue ^{[1
,2
]}

Long, Mingche ^{[1
]}

Chen, Hongchong ^{[1
]}

Liu, Yanbiao ^{[1
]}

Cai, Weimin ^{[1
]}

Shangguan, Wenfeng ^{[1
]}

机构：

[1] Shanghai Jiao Tong Univ, Sch Environm Sci & Engn, Shanghai 200240, Peoples R China

[2] Minist Educ, Key Lab Thin Film & Microfabricat Technol, Shanghai 200240, Peoples R China

来源：

ELECTROCHEMISTRY COMMUNICATIONS | 2012年 / 20卷

关键词：

Pre-annealed tungsten substrate; PEG directing; Hydrothermal reaction; WO3 nanoflake arrays; Photoelectrochemical water splitting; ENHANCED PHOTOCATALYTIC ACTIVITY; SENSITIZED SOLAR-CELLS; NANOWIRES; FILMS; OXIDE; PERFORMANCE;

D O I：

10.1016/j.elecom.2012.03.043

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

070208 [无线电物理];

摘要：

Well-aligned WO3 nanoflake arrays (WNA) as effective photoanode was vertically fabricated on tungsten sheet through a facile hydrothermal process. Before reaction, the tungsten sheet was pre-annealed to produce a thin-layer WO3 on surface to serve as seeded sites for crystal growth in hydrothermal reaction, which also provided a strong connection between the growing WO3 and substrate. Polyethylene glycol (PEG) was used as the structure-directing agent to confine the crystal growth. This preparation route obviously facilitated the charge transfer and reduced the recombination of photoexcited electron/hole. The saturated photocurrent density and IPCE value were found to be 2.35 mA cm(-2) at 1.5 V and 56% which were much higher than that prepared in the absence of pre-annealed WO3 layer and PEG. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：153 / 156

页数：4

共 22 条

[1]

Fabrication and photoelectrochemical property of tungsten(VI) oxide films with a flake-wall structure [J].