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International Journal of Photoenergy
Volume 2012 (2012), Article ID 689154, 8 pages
http://dx.doi.org/10.1155/2012/689154
Research Article

Photocatalytic Activity of Nanostructured Titanium Dioxide Thin Films

1Department of Material Science, Faculty of Mechanical Engineering, Technical University of Liberec, Studentska 2, 46117 Liberec, Czech Republic
2Department of Applied Physics and Technology, University of South Bohemia, Jeronymova 10, 370 01 Ceske Budejovice, Czech Republic
3Faculty of Science, University of South Bohemia, Branisovska 31, 370 05 Ceske Budejovice, Czech Republic
4Department of Inorganic Technology, VSCHT, Technická 5, Prague 6, 166 28, Dejvice, Czech Republic
5Département MN2S, Institut FEMTO-ST (UMR 6174) CNRS, UFC ENSMM UTBM, 26 Chemin de l'Épitaphe, 25030 Besançon Cedex, France

Received 29 April 2012; Revised 17 June 2012; Accepted 1 July 2012

Academic Editor: Panagiotis Lianos

Copyright © 2012 Zdenek Michalcik et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The aim of this paper is to investigate the properties and photocatalytic activity of nanostructured TiO2 layers. The glancing angle deposition method with DC sputtering at low temperature was applied for deposition of the layers with various columnar structures. The thin-film structure and surface morphology were analyzed by XRD, SEM, and AFM analyses. The photocatalytic activity of the films was determined by the rate constant of the decomposition of the Acid Orange 7. In dependence on the glancing angle deposition parameters, three types of columnar structures were obtained. The films feature anatase/rutile and/or amorphous structures depending on the film architecture and deposition method. All the films give the evidence of the photocatalytic activity, even those without proved anatase or rutile structure presence. The impact of columnar boundary in perspective of the photocatalytic activity of nanostructured TiO2 layers was discussed as the possible factor supporting the photocatalytic activity.