Publication Type Journal Article
Title Photosensitization of TiO2 by Ag2S and its catalytic activity on phenol photodegradation
Authors Marcia C. Neves J. M. F. Nogueira T Trindade M. H. Mendonca M. I. Pereira O. Monteiro
Groups Chem4Env
Journal JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
Year 2009
Month May
Volume 204
Number 2
Pages 168-173
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. (C) 2009 Elsevier B.V. All rights reserved.
DOI http://dx.doi.org/10.1016/j.jphotochem.2009.03.014
ISBN
Publisher
Book Title
ISSN 1010-6030
EISSN
Conference Name
Bibtex ID ISI:000266648400014
Observations
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