Reaction Kinetics, Mechanisms and Catalysis
Volume/Issue:
Volume 103: Issue 1
Photodegradation of malachite green in water solutions by means of thin films of TiO2/WO3 under visible light
Authors:
A. BojinovaLaboratory of Nanoparticle Science and Technology, Department of General and Inorganic Chemistry, Faculty of Chemistry, University of Sofia, 1 James Bourchier Blvd, Sofia 1164, Bulgaria

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C. DushkinLaboratory of Nanoparticle Science and Technology, Department of General and Inorganic Chemistry, Faculty of Chemistry, University of Sofia, 1 James Bourchier Blvd, Sofia 1164, Bulgaria

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Pages:
239–250
Online Publication Date:
05 Apr 2011
Publication Date:
01 Jun 2011
Article Category:
Research Article
DOI:
https://doi.org/10.1007/s11144-011-0295-2
Keywords:
Sol–gel process; Dip coating; TiO2/WO3 films; Visible light photocatalysis
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Abstract

Nanocomposite thin films of TiO2/WO3 are prepared by the sol–gel method on glass substrates using a dip-coating technique. The initial precursors of composite sols are chloride salts of the respective metals dissolved in ethanol with the addition of hydrogen peroxide as a catalyst of the hydrolysis and sol stabilization. The WO3 content in the films is selected to be 5 or 10%. The film thickness is controlled by the number of coating cycles. The films are dried between the successive coatings and finally annealed at 520 °C in air for 2 h. The morphology and phase composition of the composite films is characterized by SEM/EDX and X-ray analysis. The photocatalytic action of the films is tested with respect to the degradation of malachite green in water solutions under UV and visible light irradiation. The composite films TiO2/WO3 with 10% of WO3 always exhibit a better photocatalytic activity than the pure TiO2 films even under strong visible light.

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Cover Reaction Kinetics, Mechanisms and Catalysis
Reaction Kinetics, Mechanisms and Catalysis
Print ISSN:
1878-5190
Online ISSN:
1878-5204

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Reaction Kinetics, Mechanisms and Catalysis
Language English
Size B5
Year of
Foundation		 1974
Volumes
per Year		 1
Issues
per Year		 6
Founder Akadémiai Kiadó
Founder's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher		 Chief Executive Officer, Akadémiai Kiadó
ISSN 1878-5190 (Print)
ISSN 1878-5204 (Online)

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