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Relations Between Structure and Texture in Nano-Sized Aluminas

Published online by Cambridge University Press:  15 February 2011

Dominique J. Coster,
Pierre Levitz and
Jose J. Fripiat
Dominique J. Coster
Affiliation:
University of Wisconsin-Milwaukee and Laboratory for Surface Studies, P.O. Box 413 Milwaukee, WI 53211
Pierre Levitz
Affiliation:
CNRS- CRMD, rue de la Ferollerie, 45071 Orleans Cedex 2, France
Jose J. Fripiat
Affiliation:
University of Wisconsin-Milwaukee and Laboratory for Surface Studies, P.O. Box 413 Milwaukee, WI 53211
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Abstract

Alumina xerogels were prepared by a two step hydrolysis in non-aqueous media. This synthesis produced high surface area materials with controlled amount of pentacoordinated aluminum. The effect of heat treatment and of the preparation procedure on the physical characteristics of the powder was determined by nitrogen adsorption and X-Ray diffraction, whereas the aluminum coordination was studied by 27Al MAS NMR. The pore size distribution and the pentahedral aluminum content (up to 700°C) are closely related to the degree of condensation of the prehydrolysed oligomer species.

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References

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