Please use this identifier to cite or link to this item:
http://hdl.handle.net/10773/6261
Title: | Photosensitization of TiO(2) by Ag(2)S and its catalytic activity on phenol photodegradation |
Author: | Neves, M. C. Nogueira, J. M. F. Trindade, T. Mendonca, M. H. Pereira, M. I. Monteiro, O. C. |
Keywords: | Phenol Photodegradation TiO2/Ag2S Photocatalysis Photosensitizer |
Issue Date: | May-2009 |
Publisher: | Elsevier |
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 0.20mM 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. |
Peer review: | yes |
URI: | http://hdl.handle.net/10773/6261 |
DOI: | 10.1016/j.jphotochem.2009.03.014 |
ISSN: | 1010-6030 |
Appears in Collections: | DQ - Artigos |
Files in This Item:
File | Description | Size | Format | |
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Journal Photochemistry Photobiology A 204 (2009) 168.pdf | 502.61 kB | Adobe PDF |
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