TIO2-ASSISTED PHOTODEGRADATION OF DYE POLLUTANTS - II - ADSORPTION AND DEGRADATION KINETICS OF EOSIN IN TIO2 DISPERSIONS UNDER VISIBLE-LIGHT IRRADIATION

Authors
ZHANG FL ZHAO JC SHEN T HIDAKA H PELIZZETTI E SERPONE N
Citation
Fl. Zhang et al., TIO2-ASSISTED PHOTODEGRADATION OF DYE POLLUTANTS - II - ADSORPTION AND DEGRADATION KINETICS OF EOSIN IN TIO2 DISPERSIONS UNDER VISIBLE-LIGHT IRRADIATION, Applied catalysis. B, Environmental, 15(1-2), 1998, pp. 147-156
Citations number
29
Categorie Soggetti
Chemistry Physical","Engineering, Environmental
Journal title
Applied catalysis. B, Environmental → ACNP
ISSN journal
09263373
Volume
15
Issue
1-2
Year of publication
1998
Pages
147 - 156
Database
ISI
SICI code
0926-3373(1998)15:1-2<147:TPODP->2.0.ZU;2-0
Abstract
The TiO2-assisted photodegradation of anionic eosin has been examined in TiO2 aqueous dispersions under illumination by visible light. Eosin is easily decomposed photochemically by visible light in the presence of TiO2 particles. The degradation kinetics followed a Langmuir-Hinsh elwood type equation. The rate was greater in acid media than in neutr al and alkaline media, which correlates with the adsorption behavior o f eosin on the TiO2 surface. Adsorption of eosin is a prerequisite for the TiO2-assisted photodegradation. The evolution of CO2 occurred con comitantly with the photodegradation of eosin. A plausible mechanism o f degradation is discussed. (C) 1998 Elsevier Science B.V.