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Nanoparticles of SrTiO3 prepared by gel to crystallite conversion and their photocatalytic activity in the mineralization of phenol

Ahuja, S and Kutty, TRN (1996) Nanoparticles of SrTiO3 prepared by gel to crystallite conversion and their photocatalytic activity in the mineralization of phenol. In: Journal of Photochemistry and Photobiology A: Chemistry, 97 (1-2). 99-107 .

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Official URL: http://dx.doi.org/10.1016/1010-6030(96)04324-9

Abstract

Nanometre-sized powders of SrTiO3 were prepared at 70-100 degrees C by the wet-chemical method of gel to crystallite (G-C) conversion. The crystallite sizes obtained were in the range 5-13 nm, as estimated by transmission electron microscopy (TEM) studies. The photocatalytic activities of these powders in the mineralization of phenol were evaluated in comparison with Degussa P25 (TiO2). The maximum photocatalytic activity was observed for powders annealed in the range 1100-1300 degrees C. The optical spectra of the particle suspensions in water showed broadened absorption around the band gap region, together with the appearance of an absorption maximum in the UV region. The effect of inorganic oxidizing species as electron scavengers on the rate of the photocatalytic degradation of phenol was studied. The influence of bulk and surface defects, which participate in the charge transfer process during photocatalysis, was investigated systematically.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Elsevier science.
Keywords: Ph0t0eata1y515;5r710a; De9radat10n;Phen015;Per0v5k1te t1tanate5
Department/Centre: Division of Chemical Sciences > Organic Chemistry
Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited: 07 May 2011 04:58
Last Modified: 07 May 2011 04:58
URI: http://eprints.iisc.ernet.in/id/eprint/37417

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