Journal
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY
Volume 117, Issue -, Pages 19-26Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jphotobiol.2012.08.006
Keywords
Nanostructured TiO2; Spray pyrolysis; Photocatalysis; Azo dye; Mineralization; Bioindicator Artemia salina
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Funding
- National Science Fund of Bulgaria [DVU 02-36/10]
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Spray pyrolysis procedure for preparation of nanostructured TiO2 films with higher photocatalytic effectiveness and longer exploitation life is presented in this study. Thin films of active nanocrystalline TiO2 were obtained from titanium isopropoxide, stabilized with acetyl acetone and characterized by X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM) and X-ray diffraction (XRD). The activity of sprayed nanostructured TiO2 is tested for photocatalytic degradation of Reactive Black 5 dye with concentrations up to 80 ppm. Interesting result of the work is the reduction of toxicity after photocatalytic treatment of RB5 with TiO2, which was confirmed by the lower percentage of mortality of Artemia saline. It was proved that the film thickness, conditions of post deposition treatment and the type of the substrate affected significantly the photocatalytic reaction. Taking into account that the parameters are interdependent, it is necessary to optimize the preparation conditions in order to synthesize photocatalytic active films. (C) 2012 Elsevier B.V. All rights reserved.
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