Publication Type Journal Article
Title Photocatalytic decolorization of methylene blue in the presence of TiO2/ZnS nanocomposites
Authors A. Franco Marcia C. Neves M. M. L. Ribeiro Carrott M. H. Mendonca M. I. Pereira O. Monteiro
Groups
Journal JOURNAL OF HAZARDOUS MATERIALS
Year 2009
Month January
Volume 161
Number 1
Pages 545-550
Abstract The synthesis of distinct nanocrystalline TiO2 capped ZnS samples was carried out using a chemical deposition method. The materials characterization showed that the presence of ZnS onto TiO2 surface results in a red shift of the material band edge when compared with the initial semiconductor The photocatalytic activity of the prepared nanocomposites was tested on the decolorization of methylene blue (MB) aqueous solutions. The dye photodecolorization process was studied considering the influence of experimental parameters such as catalyst concentration, TiO2/ZnS ratio, pH and methylene blue adsorption rate. The material with the best catalytic activity towards the methylene blue photodecolorization was the TiO2 doped with 0.2\% of ZnS. The complete photodecolorization of a 20 ppm methylene blue Solution, at natural pH was achieved in less than 20 min, nearly 70 min faster than the TiO2 photoassisted process. (C) 2008 Elsevier B.V. All rights reserved.
DOI http://dx.doi.org/10.1016/j.jhazmat.2008.03.133
ISBN
Publisher ELSEVIER SCIENCE BV
Book Title
ISSN 0304-3894
EISSN
Conference Name
Bibtex ID ISI:000262328000075
Observations
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