Synchrotron-based studies of transition metal incorporation into silica-based sol-gel materials

Mountjoy, Gavin and Pickup, David M. and Holland, Mark A. and Wallidge, Graham and Newport, Robert J. and Smith, Mark E. (1999) Synchrotron-based studies of transition metal incorporation into silica-based sol-gel materials. In: Stock, S.R. and Mini, S.M. and Perry, D.L., eds. Application of Synchrotron Radiation Techniques to Materials Science V. Materials Research Society Symposium Proceedings, 590. Materials Research Society pp. 83-88. ISBN 1-55899-498-X. (Full text available)

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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-x) 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.

Item Type: Conference or workshop item (Paper)
Subjects: Q Science
Divisions: Faculties > Sciences > School of Physical Sciences > Functional Materials Group
Depositing User: J.M. Smith
Date Deposited: 08 May 2009 14:28 UTC
Last Modified: 13 Jan 2017 21:30 UTC
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