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

  • G. Mountjoy (a1), D.M. Pickup (a1), M.A. Holland (a1), G.W. Wallidge (a2), R.J. Newport (a1) and M.E Smith (a2)...

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.

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

  • G. Mountjoy (a1), D.M. Pickup (a1), M.A. Holland (a1), G.W. Wallidge (a2), R.J. Newport (a1) and M.E Smith (a2)...

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