Hydrothermal synthesis and morphological control of brookite-type titanium dioxide

Abstract

Hydrothermal synthesis and morphological control of brookite-type titanium dioxide were performed using an aqueous solution of a water-soluble peroxo-glycolato titanium complex in the presence of various amines. Single phase brookite-type TiO₂ could be obtained using amine as an additive. The aspect ratio of the obtained brookite particles was approximately 1 using dimethylamine or trimethylamine. The brookite particles had many crystal facets and were polyhedron shaped. The reason for the formation of brookite with this polyhedral morphology may be attributed to an interaction between a negative charge of TiO₂ surface and amine cation.