Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/71955
Type: Artigo de periódico
Title: SORPTION OF HYDROGEN-PEROXIDE BY TITANIUM(IV) OXIDE GRAFTED ON SILICA-GEL SURFACE
Author: KUBOTA, LT
GUSHIKEM, Y
MANSANARES, AM
VARGAS, H
Abstract: Hydrogen peroxide was adsorbed from an aqueous solution by titanium (IV) oxide grafted on a silica gel surface, The maximum sorption capacity, 1.2 molecule nm(-2), was achieved in solution at pH 3. The photoacoustic spectrum of the sorbed species indicated a similar structure for the complex formed between Ti4+ and H2O2 in aqueous solution (Ti(H2O2)(m)(4+)). The adsorbed hydrogen peroxide retained the oxidation capacity for several weeks, Electron spin resonance showed the presence of a free radical on the surface, The observed g values, g(1) = 2.000, g(2) = 2.007, and g(3) = 2.020, were attributed to the = Ti+O2- radical, formed during the decomposition of adsorbed hydrogen peroxide. (C) 1995 Academic Press, Inc.
Editor: Academic Press Inc Jnl-comp Subscriptions
Rights: fechado
Identifier DOI: 10.1006/jcis.1995.1337
Date Issue: 1995
Appears in Collections:Artigos e Materiais de Revistas Científicas - Unicamp

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