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Rectorite Pillared with Ce-Modified Aluminum Oxide

Published online by Cambridge University Press:  28 February 2011

Jianxin Wu,
Edward F. Rakiewicz and
Robert R. Gatte
Jianxin Wu
Affiliation:
Washington Research Center, W. R. Grace & Co., 7379 Route 32, Columbia, Maryland, USA
Edward F. Rakiewicz
Affiliation:
Washington Research Center, W. R. Grace & Co., 7379 Route 32, Columbia, Maryland, USA
Robert R. Gatte
Affiliation:
Washington Research Center, W. R. Grace & Co., 7379 Route 32, Columbia, Maryland, USA
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Abstract

Rectorite clay was pillared with an Al/Ce-cluster pillaring agent made from aluminum chlorhydrol and cerium nitrate. The resulting product had an interlayer distance of 15.7 Å, which was significantly larger than the interlayer distance obtained using conventional aluminum chlorhydrol as the pillaring agent (8.4 Å). Argon adsorption analysis indicates that the pores of the AL/Ce-cluster pillared rectorite are non-uniform, with pore diameters ranging from 5 to 16Å. 29Si MAS NMR studies showed that calcining the natural rectorite changes the silicon environment, while the pillared rectorite clays are much more resistant to such changes upon calcination. It is suggested that pillaring reactions enhance the thermal stability of the rectorite by stabilizing the local silicon environment in the clay.

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Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 371: Symposium W1 – Advances in Porous Materials , 1994, 181
Copyright
Copyright © Materials Research Society 1995

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