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

Paper ID Volume ID Publish Year Pages File Format Full-Text
51545 46846 2009 5 PDF Available
Title
Superior photocatalytic performance by vertically aligned core–shell TiO2/WO3 nanorod arrays
Abstract

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.

Keywords
Core–shell materials; Photocatalysis; Nanorods; Glancing angle deposition
First Page Preview
Superior photocatalytic performance by vertically aligned core–shell TiO2/WO3 nanorod arrays
Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 10, Issue 7, 10 March 2009, Pages 1117–1121
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis