Process for the preparation of titanium dioxide having nanometric dimensions and controlled shape

摘要

The present invention relates to a process for the preparation of materials with nanometric dimensions and controlled shape, based on titanium dioxide. The invention also relates to a process for the preparation of titanium dioxide nanorods and nanocubes with anatase phase composition, which are highly suitable for photocatalytic use, in particular for applications involving photovoltaic cells, for example Dye Sensitized Solar Cells (DSSC), photoelectrolysis cells and tandem cells for the conversion of solar energy and the production of hydrogen.

主权项

1. Process for the preparation of controlled-shape nanocrystalline TiO2 particles, mainly in anatase form, wherein at least 50% by weight of said TiO2 particles have nanorod shape, comprising the reaction of a titanium dioxide precursor with an ester, water and optionally an alcohol, wherein said ester and precursor are used in a ratio between 1/1 and 5/1 in presence of said alcohol, or between 12/1 and 4/1 in absence of said alcohol, and wherein the water has a pH ranging from 0 to 7.