Abstract
Neat tetraethylorthosilicate reacts with neat hexafluoroacetone trihydrate to give particulate silica xerogel precipitates. Particulates formed early in the reaction have spheroidal micromorphology, and control of the reaction conditions affords particle sizes approaching 25 nm in diameter. A mixture of tetraethylorthosilicate and Ti(Oi-Pr) 4 reacts with hexafluoroacetone trihydrate as neat liquids at 5 °C to give immediate precipitation of a Si/Ti mixed-metal oxide xerogel particulate having a Si:Ti molar ratio of approximately 9:6.
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