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Synchrotron-Based Studies of Transition Metal Incorporation into Silica-Based Sol-Gel Materials

Published online by Cambridge University Press:  10 February 2011

G. Mountjoy ,
D.M. Pickup ,
M.A. Holland ,
G.W. Wallidge ,
R.J. Newport  and
M.E Smith
G. Mountjoy
Affiliation:
School of Physical Sciences, University of Kent at Canterbury, Canterbury CT2 7NF, U.K.
D.M. Pickup
Affiliation:
School of Physical Sciences, University of Kent at Canterbury, Canterbury CT2 7NF, U.K.
M.A. Holland
Affiliation:
School of Physical Sciences, University of Kent at Canterbury, Canterbury CT2 7NF, U.K.
G.W. Wallidge
Affiliation:
Department of Physics, University of Warwick, Coventry CV4 7AL, U.K.
R.J. Newport
Affiliation:
School of Physical Sciences, University of Kent at Canterbury, Canterbury CT2 7NF, U.K.
M.E Smith
Affiliation:
Department of Physics, University of Warwick, Coventry CV4 7AL, U.K.
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Abstract

Previous structural studies on titania- and zirconia-silica xerogels have shown the occurrence of homogeneous mixing at low metal content, and phase separation at high metal content. The use of additional, complementary, synchrotron-based methods can contribute to a fuller structural description of these materials. We present new x-ray absorption near edge structure (XANES) and SAXS results for (ZrO2)x(SiO2)1-x, xerogels and compare them with previous results for (TiO2)x(SiO2)1-x xerogels. Significant differences between (TiO2)x(SiO2)1. and (ZrO2)X(SiO2)1-x xerogels are observed in the affects of heat treatment on the coordination of homogeneously mixed metal atoms, and in the development of phase separated metal oxide regions.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 590: Symposium R – Applications of Synchrotron Radiation Techniques…V , 1999 , 83
Copyright
Copyright © Materials Research Society 2000

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References

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