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Type: Artigo de periódico
Title: Sorption Of Hydrogen Peroxide By Titanium (iv) Oxide Grafted On Silica Gel Surface
Author: Kubota L.T.
Gushikem Y.
Mansanares A.M.
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)4+ m). 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, g1 = 2.000, g2 = 2.007, and g3 = 2.020, were attributed to the = Ti4 O- 2 radical, formed during the decomposition of adsorbed hydrogen peroxide. © 1995 Academic Press. All rights reserved.
Rights: fechado
Identifier DOI: 10.1006/jcis.1995.1337
Date Issue: 1995
Appears in Collections:Unicamp - Artigos e Outros Documentos

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