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Journal of Sol-Gel Science and Technology
Published in: Journal of Sol-Gel Science and Technology 2/2012

01-02-2012 | Original Paper

How room-humidity during the coating affects the structural, optical and photocatalytic properties of TiO2 films

Authors: M. E. de Anda Reyes, G. Torres Delgado, R. Castanedo Pérez, J. Márquez Marín, O. Zelaya Ángel

Published in: Journal of Sol-Gel Science and Technology | Issue 2/2012

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Abstract

TiO2 thin films were obtained on glass slide substrates by the sol–gel technique. The substrates were coated by the immersion-removal method, at a constant withdrawal speed. The TiO2 precursor solution and the substrate were maintained in a closed box with a controlled relative humidity (RH) during the removal of the substrate. The RH was varied in the 30–90% range in steps of 20%. The films were dried and after that sintered in an open atmosphere. The effect of the RH was studied on the structural, optical and photocatalytic properties. The films are polycrystalline with an anatase phase and show a high optical transmission in the UV–Vis range. The photocatalytic activity was evaluated by the photobleaching of methylene blue in an aqueous solution. The best photocatalytic activity was obtained for the films with 90% RH, this fact is mainly attributed to the highest porosity value obtained for these films.
previous article The investigation of some physical properties and microstructure of Zn-doped hydroxyapatite bioceramics prepared by sol–gel method
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Metadata
Title
How room-humidity during the coating affects the structural, optical and photocatalytic properties of TiO2 films
Authors
M. E. de Anda Reyes
G. Torres Delgado
R. Castanedo Pérez
J. Márquez Marín
O. Zelaya Ángel
Publication date
01-02-2012
Publisher
Springer US
Published in
Journal of Sol-Gel Science and Technology / Issue 2/2012
Print ISSN: 0928-0707
Electronic ISSN: 1573-4846
DOI
https://doi.org/10.1007/s10971-011-2628-z

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