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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
UV-vis versus visible degradation of Acid Orange II in a coupled CdS/TiO
2
semiconductors suspension
Journal of Photochemistry and Photobiology A: Chemistry, Volume 183, No. 1-2, Year 2006
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Description
TiO2, CdS and coupled CdS/TiO2 powders with CdS percentage varied from 5 to 50% (w/w) have been prepared by a sol-gel method. These pure and composite semiconductors were tested for the photocatalytic degradation of an anionic azo-dye, i.e. Orange II in aerated aqueous suspension under UV-vis and visible (λ > 400 nm) illumination. The photocatalytic efficiency of the CdS/TiO2 couples is found to strongly depend on the proportion of CdS. Under UV-vis light, CdS/TiO2 couples containing a low proportion of CdS are found to be as efficient as pure TiO2 which shows the best photocatalytic activity. Under visible illumination, these formers exhibit faster degradation rate than both isolated components of the composite photocatalyst. The results obtained under both illumination conditions are compared and discussed in order to elucidate the respective role of Acid Orange II and CdS in the photosensitization mechanism of TiO2. © 2006 Elsevier B.V. All rights reserved.
Authors & Co-Authors
Bessekhouad, Yassine
Algeria, Algiers
Ecole Nationale Vétérinaire
France, Nancy
Université de Lorraine
Chaoui, Nouari
France, Nancy
Université de Lorraine
Trzpit, M.
France, Nancy
Université de Lorraine
Ghazzal, Mohamed Nawfal
France, Nancy
Université de Lorraine
Robert, Didier
France, Nancy
Université de Lorraine
Weber, Jean Victor
France, Nancy
Université de Lorraine
Statistics
Citations: 197
Authors: 6
Affiliations: 2
Identifiers
Doi:
10.1016/j.jphotochem.2006.03.025