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Type: Artigo de periódico
Title: Mesoporous redox molecular sieves analogous to MCM-41
Author: Carvalho, WA
Varaldo, PB
Wallau, M
Schuchardt, U
Abstract: The synthesis of MCM-41 analogue mesoporous metallosilicates with high specific surfaces, containing the redox active metals Ti, V, Cr, Mn, Fe, or Co, from an aqueous gel, under reflux is described. Their X-ray diffractograms reveal a highly ordered array of the mesopores. A strong host-guest interaction between the incorporated template molecules and the pore walls, observed by C-13 n.m.r., indicates the incorporation of the metals, which is further evidenced by u.v.-vis and Si-29 n.m.r. spectroscopy. These mesoporous metallosilicates are active as catalysts for the liquid phase oxidation of cyclohexane with aqueous H2O2 or tert-butyl hydroperoxide. (C) Elsevier Science Inc. 1997.
Subject: mesoporous metallosilicates
redox molecular sieves
spectroscopic characterization
liquid phase oxidation of cyclohexane
Editor: Elsevier Science Inc
Rights: fechado
Identifier DOI: 10.1016/S0144-2449(97)00031-6
Date Issue: 1997
Appears in Collections:Unicamp - Artigos e Outros Documentos

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