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Photosensitization of TiO2 by Ag2S and its catalytic activity on phenol photodegradation

Paper ID Volume ID Publish Year Pages File Format Full-Text
27446 44023 2009 6 PDF Available
Title
Photosensitization of TiO2 by Ag2S and its catalytic activity on phenol photodegradation
Abstract

A process of TiO2 photosensitization by coupling it with a narrow band gap semiconductor has been investigated here. Distinct TiO2/Ag2S nanocomposites were prepared by a single-source decomposition method. After sensitization, the TiO2 materials were evaluated as photocatalysts on the degradation of aqueous phenol solutions. The experimental results show that the nanocomposites photocatalytic activity is related with the existence of Ag2S over the TiO2 surface. The best catalytic results, for phenol photodegradation, were obtained using a TiO2/Ag2S material with a surface Ti/Ag atomic ratio equal to 2.40. With this material the complete photodegradation of a 0.20 mM phenol solution was achieved within 90 min, which is considerably faster when compared with the use of TiO2. The occurrence of main degradation byproducts was also investigated.

Keywords
Phenol; Photodegradation; TiO2/Ag2S; Photocatalysis; Photosensitizer
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Photosensitization of TiO2 by Ag2S and its catalytic activity on phenol photodegradation
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 204, Issues 2–3, 20 May 2009, Pages 168–173
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
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Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
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