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http://repositorio.unicamp.br/jspui/handle/REPOSIP/28970
Type: | Artigo de periódico |
Title: | Adsorption of hidrogen peroxide on the surface of silica - titania mixed oxide obtained by the sol-gel processing method |
Author: | Gonçalves, J. E. Filho, U.P. R. Franco, D.W. Gushikem, Y. |
Abstract: | This work describes the sol-gel mixed oxide SiO2/TiO2 property, ST, as prepared, and submitted to heat treatment a 773 K, STC. SEM and EDS images show, within magnification used, a uniform distribution of the TiO2 particles in SiO2/TiO2 matrix. Both, ST and STC adsorb hydrogen peroxide on the surface and through EPR and UV-Vis diffuse reflectance spectra, it was possible to conclude that the species on the surface is the peroxide molecule attached to the Lewis acid site of titanium particle surface, alphaTi(H2O2)+. As the material is very porous, presumably the hydrogen peroxide molecule is confined in the matrix pores on the surface, a reason why the adsorbed species presents an exceptional long lived stability. |
Subject: | sol-gel silica-titania hydrogen peroxide adsorption porous material |
Editor: | Fundação Editora da Universidade Estadual Paulista Júlio de Mesquita Filho - UNESP |
Rights: | aberto |
Identifier DOI: | 10.1590/S0100-46702007000200007 |
Address: | http://dx.doi.org/10.1590/S0100-46702007000200007 http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-46702007000200007 |
Date Issue: | 1-Jan-2007 |
Appears in Collections: | Unicamp - Artigos e Outros Documentos |
Files in This Item:
File | Description | Size | Format | |
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S0100-46702007000200007.pdf | 167.01 kB | Adobe PDF | View/Open |
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