Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/74095
Type: Artigo de periódico
Title: Synthesis and surface properties of Ti-containing mesoporous aluminophosphates. A comparison with Ti-grafted mesoporous silica Ti-MCM-41
Author: Gianotti, E
Oliveira, EC
Coluccia, S
Pastore, HO
Marchese, L
Abstract: Mesoporous aluminophosphates (ALPO) was synthesised using cetyltrimethylammonium bromide (CTMABr) as a structure-directing agent, phosphoric acid and aluminum sulfate as sources of structure elements. Ti(IV) ions were introduced into mesoporous ALPO by grafting titanocene dichloride, [Cp2TiCl2], onto the P-OH and Al-OH groups exposed in the channels. FTIR spectroscopy was used to study surface hydroxyls, and by the use of NH3 as molecular probe, to assess the surface acidity of both meso-ALPO and meso-Ti-ALPO materials. The coordination of Ti(IV) centres in Ti-ALPO material was studied using DR UV-Vis spectroscopy. (C) 2003 Elsevier Science B.V. All rights reserved.
Subject: mesostructures
aluminophosphates
titanium-aluminophosphates
FTIR spectroscopy
surface acidity
DR UV-Vis spectroscopy
Country: Suíça
Editor: Elsevier Science Sa
Rights: fechado
Identifier DOI: 10.1016/S0020-1693(03)00031-8
Date Issue: 2003
Appears in Collections:Artigos e Materiais de Revistas Científicas - Unicamp

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