Synthesis of high surface area CoAl2O4 and NiAl2O4 spinels by an alkoxide route

Synthesis of high surface area CoAl2O4 and NiAl2O4 spinels by an alkoxide route The mixed metal oxides CoAl2O4 and NiAl2O4 were prepared in a high surface area form by using a sol-gel method which involves hydrolysis of cobalt-aluminium and nickel-aluminium isopropoxides. The resulting gels were calcined at 673 K to yield the corresponding spinel-type metal oxides. Powder X-ray diffraction was used to confirm spinel formation. Nitrogen adsorption-desorption measurements have shown the materials obtained to be highly porous. The BET surface area was found to be 240 m2g−1 for CoAl2O4 and 255 m2g−1 for NiAl2O4. Both materials showed a unimodal distribution of pore radii, where the most frequent pore radius is 5 nm for cobalt aluminate and 3 nm for nickel aluminate. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Research on Chemical Intermediates Springer Journals

Synthesis of high surface area CoAl2O4 and NiAl2O4 spinels by an alkoxide route

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Publisher
Springer Netherlands
Copyright
Copyright © 1999 by Springer
Subject
Chemistry; Catalysis; Physical Chemistry; Inorganic Chemistry
ISSN
0922-6168
eISSN
1568-5675
D.O.I.
10.1163/156856799X00293
Publisher site
See Article on Publisher Site

Abstract

The mixed metal oxides CoAl2O4 and NiAl2O4 were prepared in a high surface area form by using a sol-gel method which involves hydrolysis of cobalt-aluminium and nickel-aluminium isopropoxides. The resulting gels were calcined at 673 K to yield the corresponding spinel-type metal oxides. Powder X-ray diffraction was used to confirm spinel formation. Nitrogen adsorption-desorption measurements have shown the materials obtained to be highly porous. The BET surface area was found to be 240 m2g−1 for CoAl2O4 and 255 m2g−1 for NiAl2O4. Both materials showed a unimodal distribution of pore radii, where the most frequent pore radius is 5 nm for cobalt aluminate and 3 nm for nickel aluminate.

Journal

Research on Chemical IntermediatesSpringer Journals

Published: Apr 15, 2009

References

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