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One pot direct hydrothermal growth of photoactive TiO2 films on glass

Paper ID Volume ID Publish Year Pages File Format Full-Text
28261 44067 2009 5 PDF Available
Title
One pot direct hydrothermal growth of photoactive TiO2 films on glass
Abstract

We demonstrate that titanium (IV) oxide films may be deposited on Corning glass by a simple, one-pot, low temperature (95 °C) hydrothermal growth technique and that providing the correct conditions are employed, the films produced show clear photoactivity under UV illumination as evidenced by changes in water contact angle and the progressive photo-oxidation of stearic acid. It is further demonstrated that the growth, structure and photoactivity of the films depends critically upon the H2O concentration employed during growth. For H2O concentrations below 0.1 M, little or no growth was observed, while above 0.3 M, precipitation or even gelation rapidly occurred. Only at H2O concentrations of 0.1 M and 0.2 M was appreciable film growth observed, while photoactive titania was formed only via growth using a water concentration of 0.1 M, the films grown using the higher concentration of water (0.2 M) being essentially photo-inactive. The method developed is discussed in terms of the possible chemical steps involved and is proposed as a low-cost alternative to higher temperature, less environmentally friendly approaches to TiO2 film production.

Keywords
Hydrothermal growth; Titania; Photoactivity; Anatase; Thin films
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 202, Issues 2–3, 25 February 2009, Pages 81–85
Authors
, , , , , , , ,
Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
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Don't Miss Today's Special Offer
Price was $35.95
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Price after discount Only $4.95
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