Fabrication of hexagonal/cubic tungsten oxide homojunction with improved photocatalytic activity

被引：49

作者：

Kong, Yueqi ^{[1
]}

Sun, Honggang ^{[2
]}

Zhao, Xian ^{[1
]}

Gao, Baoyu ^{[2
]}

Fan, Weiliu ^{[3
]}

机构：

[1] Shandong Univ, State Key Lab Crystal Mat, Jinan 250100, Peoples R China

[2] Shandong Univ, Sch Environm Sci & Engn, Jinan 250100, Peoples R China

[3] Shandong Univ, Sch Chem & Chem Engn, Jinan 250100, Peoples R China

来源：

APPLIED CATALYSIS A-GENERAL | 2015年 / 505卷

基金：

中国国家自然科学基金; 中国博士后科学基金;

关键词：

Tungsten oxide; Homojunction; Photocatalyst; CONTROLLABLE SYNTHESIS; FLOWER-LIKE; WO3; TRIOXIDE; FILMS; WATER; PHOTOLYSIS; NANOWIRES; PHASES;

D O I：

10.1016/j.apcata.2015.05.015

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：

A homojunction with different phases of tungsten oxide photocatalyst was prepared via a hydrothermal method by adjusting the pH value. The structural analysis showed the homojunction consisted of tungsten bronze-type (hexagonal) and pyrochlore-type (cubic) structures. The rod-like hexagonal phase inserted into block cubic phase to form a well-defined homojunction structure under the proper pH condition. The activity of photocatalyst was tested through degradating RhB and water oxidation. The results indicated the homojunction photocatalyst displayed a higher photocatalytic activity compared with individual tungsten oxide under visible light and full sunlight spectra irradiation. The further investigations revealed the inner electric filed at the interface of the homojunction facilitated the separation of electron-hole pairs, resulting in the improved photoelectrochemical performance. The design of favorable tungsten oxide homojunction structure in the present work provided a promising method for the development of other efficient photocatalysts. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：447 / 455

页数：9

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