Mountjoy, G. and Pickup, D.M. and Holland, M.A. and Wallidge, G.W. and Newport, R.J. and Smith, M.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)
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)|
|Divisions:||Faculties > Science Technology and Medical Studies > School of Physical Sciences > Functional Materials Group|
|Depositing User:||J.M. Smith|
|Date Deposited:||08 May 2009 14:28|
|Last Modified:||19 Jun 2012 08:26|
|Resource URI:||http://kar.kent.ac.uk/id/eprint/15928 (The current URI for this page, for reference purposes)|