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Porous Solids of Boron Phosphate, Aluminum Phosphate, and Silicon Phosphate

Published online by Cambridge University Press:  28 February 2011

K. B. Babb ,
D. A. Lindquist ,
S. S. Rooke ,
W. E. Young  and
M. G. Kleve
K. B. Babb
Affiliation:
The University of Arkansas at Little Rock, Department of Chemistry
D. A. Lindquist
Affiliation:
The University of Arkansas at Little Rock, Department of Chemistry
S. S. Rooke
Affiliation:
The University of Arkansas at Little Rock, Department of Chemistry
W. E. Young
Affiliation:
The University of Arkansas at Little Rock, Department of Chemistry
M. G. Kleve
Affiliation:
Department of Biology, Little Rock, Arkansas 72204
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Abstract

Anhydrous sol-gel condensation of triethyl phosphate [(CH3CH2O)3PO] with boron trichioride (BCl3), triethyl aluminum [(CH3CH2)3Al] or silicon tetrachloride [SiCI4] in organic solvents led to rigid gels. The pore fluid of the gels was removed under supercritical conditions in a pressurized vessel to form porous solids. The condensation chemistry prior to the gel point was monitored by solution 1H, 13C, 31P, and 11B NMR. The materials were then calcined at progressively higher temperatures to produce high surface area phosphates. Nitrogen gasphysisorption was used to determine the surface areas, total pore volume, and average pore radius of the products. FT-IR was used to determine functional groups in the materials. The microstructure was also examined by scanning electron microscopy.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 371: Symposium W1 – Advances in Porous Materials , 1994 , 211
Copyright
Copyright © Materials Research Society 1995

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