Issue 12, 2002
From the journal:

Journal of Materials Chemistry

Comparison of the structural and acid–base properties of Ga- and Al-containing layered double hydroxides obtained by microwave irradiation and conventional ageing of synthesis gels

Didier Tichit,*a   Alice Rolland,a   Federica Prinetto,b   Geolar Fetter,c   Maria de Jesus Martinez-Ortiz,ad   Miguel A. Valenzuelad  and  Pedro Bosche  

* Corresponding authors

a Laboratoire de Matériaux Catalytiques et Catalyse en Chimie Organique, UMR 5618 CNRS-ENSCM, 8 rue Ecole Normale, 34296 Montpellier, Cedex 5, France
E-mail: tichit@cit.enscm.fr
Fax: +33 467144349
Tel: +33 496144390

b Dipartimento di Chimica IFM, Università di Torino, Via P. Giuria 7, 10125 Torino, Italy

c Facultad de Ciencias Químicas, Benemérita Universidad Autónoma de Puebla, Blvd. 14 Sur y Av. San Claudio, C. P. 72570 Puebla, PUE, México

d SEPI, ESIQIE, Instituto Politécnico Nacional, UPALM, Edif. 8, C. P. 07738 México, DF, México

e Departamento de Química, Universidad Autónoma Metropolitana – Iztapalapa, Michoacán y la Purísima, México, DF, C. P. 09340México

Abstract

Structural and acid–base properties of Mg/Al and Mg/Ga layered double hydroxides (LDH's) obtained by microwave irradiation of the co-precipitated gels have been investigated and compared to those of samples conventionally aged by prolonged hydrothermal treatment of the gels. Similar crystallinities and chemical compositions were obtained whatever the synthesis method used. Besides, all samples, and remarkably the Ga-containing LDH's with a molar ratio Mg ∶ Ga = 4.5, exhibited pure lamellar phases. The acid–base properties of the mixed oxides obtained by calcination of the LDH's have been examined by microcalorimetric adsorption of CO2 and by FTIR spectroscopy upon CH3CN interaction. These techniques gave evidence that the number and strength of acid and basic sites were influenced by the nature and amount of the trivalent cation, as well as by the preparation method.

Graphical abstract: Comparison of the structural and acid–base properties of Ga- and Al-containing layered double hydroxides obtained by microwave irradiation and conventional ageing of synthesis gels

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Article information

DOI
https://doi.org/10.1039/B203376N
Article type
Paper
Submitted
05 Apr 2002
Accepted
29 Aug 2002
First published
16 Sep 2002

J. Mater. Chem., 2002,12, 3832-3838

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Comparison of the structural and acid–base properties of Ga- and Al-containing layered double hydroxides obtained by microwave irradiation and conventional ageing of synthesis gels

D. Tichit, A. Rolland, F. Prinetto, G. Fetter, M. de Jesus Martinez-Ortiz, M. A. Valenzuela and P. Bosch, J. Mater. Chem., 2002, 12, 3832 DOI: 10.1039/B203376N

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