Superior photocatalytic performance by vertically aligned core-shell TiO2/WO3 nanorod arrays

被引：79

作者：

Smith, W. ^{[1
]}

Zhao, Y. -P. ^{[1
]}

机构：

[1] Univ Georgia, Dept Phys & Astron, Nanoscale Sci & Engn Ctr, Athens, GA 30601 USA

来源：

CATALYSIS COMMUNICATIONS | 2009年 / 10卷 / 07期

关键词：

Core-shell materials; Photocatalysis; Nanorods; Glancing angle deposition; THIN-FILMS; HYDROGEN-PRODUCTION; TITANIA; ANATASE; GROWTH; WO3; NANOPARTICLES; MICROSPHERES; DEPOSITION; EFFICIENCY;

D O I：

10.1016/j.catcom.2009.01.010

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：

Using two consecutive regarding glancing angle depositions at different deposition angles and with different materials, a WO3-core TiO2-shell nanostructure has been fabricated and has photocatalytic enhancement up to 70 times over amorphous single layer TiO2 thin films, 13 times enhancement over crystalline (anatase) TiO2 thin films, and 3 times enhancement over c-TiO2/a-WO3 two-layer thin films, with much less the load of TiO2. We believe that the mechanism for the photocatalytic enhancement is from the increased density of charge separated electron-hole pairs aided by the WO3 layer, the interfacial area between the two-layers, and the large surface area from the porous nanostructure. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：1117 / 1121

页数：5

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