期刊
THIN SOLID FILMS
卷 515, 期 7-8, 页码 3521-3526出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.tsf.2006.10.113
关键词
carbon-doped titanium oxide; anatase; visible-light photocatalyst; photocatalysis
Carbon-doped titanium oxide films (TiOxCy) were deposited by an ion-assisted electron-beam evaporation system, using rutile TiO2 powder as the source material and carbon monoxide flowing through an ion gun as the dopant source. A series of films was prepared under the bombardment of ion beam with a fixed voltage of 1000 V and various beam currents of 10, 20 and 35 mA. As-deposited films have the primary structure of anatase TiO2, characterized by X-ray diffraction and Raman spectroscopy. With the increasing ion-beam current, the film crystallinity deteriorated, the concentration of carbon with Ti-C bonding in the films varied from 0.8 to 1.3 mol%, and their optical absorption edges gradually red-shifted from 370 to 410 nm. The TiOxCy film deposited with 10 mA beam current has well-crystallized anatase phase, exhibiting the highest water-contact angle reduction and the best visible-light photocatalytic activity. (c) 2006 Elsevier B.V. All rights reserved.
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