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Synthesis and Structural Characterization of Organically-Modified Microporous Silicates

Published online by Cambridge University Press:  10 February 2011

F. Babonneau,
L. Leite,
S. Fonlupt,
F. Ribot,
L. Bergogne and
C. Roux
F. Babonneau
Affiliation:
Université Pierre et Marie Curie / CNRS, Chimie de la Matière Condensée, Paris, France
L. Leite
Affiliation:
Université Pierre et Marie Curie / CNRS, Chimie de la Matière Condensée, Paris, France
S. Fonlupt
Affiliation:
Université Pierre et Marie Curie / CNRS, Chimie de la Matière Condensée, Paris, France
F. Ribot
Affiliation:
Université Pierre et Marie Curie / CNRS, Chimie de la Matière Condensée, Paris, France
L. Bergogne
Affiliation:
Université Pierre et Marie Curie / CNRS, Chimie de la Matière Condensée, Paris, France
C. Roux
Affiliation:
Université Pierre et Marie Curie / CNRS, Chimie de la Matière Condensée, Paris, France
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Abstract

Organically-modified silicates have been synthesized from RSi(OEt)3 (R = CH3, C2H5, C8H17, CH2=CH, C6H5) and TEOS under acidic conditions, in the presence of cethyltrimethylammonium (CTAB). The introduction of RSiO1.5 units with R/Si =0.2, affects the ordering of the expected hexagonal silicate phase, except when R = C6H5. The sample containing phenyl functions was thus submitted to surfactant extraction; calcination at 350°C appears to be more efficient, and less disruptive for the network ordering than a washing procedure in ethanol. Nitrogen adsorption measurements on the hexagonally ordered calcined sample that still contains phenyl groups, yields a type I isotherm, typical of a microporous solid. BET method leads to a surface area of 1000 m2/g and a pore volume of 0.32 cm3/g.

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Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 519: Symposium O – Organic/Inorganic Hybrid Materials , 1998, 363
Copyright
Copyright © Materials Research Society 1998

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