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Preparation of Nanoporous MgAl2O4 by Combined Utilization of Sol-Gel Process and Combustion of Biorenewable Oil

Published online by Cambridge University Press:  09 March 2011

Christian Hörtz ,
Danielle M. Ladd  and
Dong-Kyun Seo
Christian Hörtz
Affiliation:
Johannes Gutenberg University Mainz, Duesbergweg 10-14, D-55128 Mainz, Germany
Danielle M. Ladd
Affiliation:
Department of Chemistry and Biochemistry, Arizona State University, Tempe, AZ 85287-1604, U.S.A.
Dong-Kyun Seo
Affiliation:
Department of Chemistry and Biochemistry, Arizona State University, Tempe, AZ 85287-1604, U.S.A.
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Abstract

Nanoporous MgAl2O4 particulates with high porosities were successfully prepared from sol-gel reactions, solvent exchange with castor oil and subsequent combustion and calcination at 700 °C. The products were crystalline and semitransparent. Changes in the metal precursor concentrations allowed control of pore volumes from 0.7 to 1.1 cm3/g and average pore sizes from 14 to 19 nm. The specific surface areas are about 200 m2/g regardless of the precursor concentrations. After heating at 1000 °C for 10 hours, the products kept about 70% of their original pore volume and about 60% of the original surface area. Heating at 1100 °C caused a drastic reduction of pore volume and surface area to 40 and 36%, respectively, as the average particle size increased to 23 nm.

Keywords

aerogelsol-gelcatalytic
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1306: Symposium BB – Aerogels and Aerogel-Inspired Materials , 2011 , mrsf10-1306-bb09-03
Copyright
Copyright © Materials Research Society 2011

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References

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