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Potentialities of an Innovative Technique Like 129Xe NMR and of Saxs for the Characterization of Microporous Sol-Gel Derived SiO2

Published online by Cambridge University Press:  10 February 2011

L. C. de Menorval ,
A. Julbe ,
H. Jobic ,
J. A. Dalmon  and
C. Guizard
L. C. de Menorval
Affiliation:
Laboratoire des Matériaux Catalytiques et Catalyse en Chimie Organique (UMR 5618 CNRS) ENSCM, 8 Rue de l'Ecole Normale, 34 053 Montpellier cedex 1, France.
A. Julbe*
Affiliation:
Laboratoire des Matédés Membranaires (UMR 5635 CNRS-ENSCM-UM II), 8 Rue de l'Ecole Normale, 34 053 Montpellier cedex 1, France
H. Jobic
Affiliation:
Institut de Recherches sur la Catalyse (CNRS), 2 Avenue Albert Einstein, 69 626 Villeurbanne cedex, France
C. Guizard
Affiliation:
Laboratoire des Matédés Membranaires (UMR 5635 CNRS-ENSCM-UM II), 8 Rue de l'Ecole Normale, 34 053 Montpellier cedex 1, France
*
#To whom correspondence should be sent
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Abstract

Addition of surfactants in TEOS derived sols leads to micro- or mesoporous materials whose porous texture can be varied by changing the surfactant quantity and/or chain length. This series of materials, with a relatively narrow pore size distribution, is well adapted to study the potentialities of an innovative characterization technique like 129Xe Nuclear Magnetic Resonance in comparison with Small Angle X-ray Scattering and N2 adsorption. SAXS revealed a high surface rugosity of the materials and a good correlation with pore hydraulic radius distributions measured by N2 adsorption. Using 129Xe NMR, we have studied the Xe chemical shifts (δXe,) as a function of pXe, and have pointed out several original results showing the importance, for microporous materials, of the NMR line shapes and of the slope of the lines δXe.=f(pXe).

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 431: Symposium P – Microporous and Macroporous Materials , 1996 , 159
Copyright
Copyright © Materials Research Society 1996

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