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Synthesis And Characterization Of Pillared Acid-Activated Montmorillonites

Published online by Cambridge University Press:  15 February 2011

Robert Mokaya ,
William Jones ,
Mavis E. Whittle  and
Mary E. Davies
Robert Mokaya
Affiliation:
Chemistry Department, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, England.
William Jones
Affiliation:
Chemistry Department, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, England.
Mavis E. Whittle
Affiliation:
Laporte Research and development, Moorfield Road, Widnes, WA8 OFE, England.
Mary E. Davies
Affiliation:
Laporte Research and development, Moorfield Road, Widnes, WA8 OFE, England.
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Abstract

Polymeric hydroxy-Al cations were introduced into the interlayer of acid-activated montmorillonites by cation exchange. The resulting pillared materials possessed layer spacings of 18 – 20 Å, surface areas between 250 – 320 m2/g, pore volumes in the range 0.3 – 0.38 cc/g and pore diameters in the range 32 – 40 Å depending on preparation procedures (i.e pillaring temperature and drying method). Powder XRD analysis indicated that the pillars formed were stable to temperatures above 500 °C. The surface acidity of these type of pillared clays was higher than that of pillared non-activated clays. Preliminary studies on their adsorption capacity for chlorophyll showed that they were superior to pillared non-activated clays.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 233: Symposium U – Synthesis/Characterization and Novel Applications of Molecular Sieve Materials , 1991 , 81
Copyright
Copyright © Materials Research Society 1991

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References

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