Luminescent samarium-doped titanium dioxide

Abstract

This disclosure relates to a process for making luminescent titanium dioxide, comprising: precipitating a halide salt and a hydrolyzed compound comprising titanium from a reaction mixture comprising a source of samarium, a titanium starting material selected from the group consisting of titanium tetrachloride, titanium oxychloride, and mixtures thereof, a base selected from the group consisting of ammonium hydroxide, ammonium carbonate, ammonium bicarbonate, tetramethyl ammonium hydroxide or tetraethyl ammonium hydroxide or mixture thereof, and a solvent selected from the group consisting of ethanol, n-propanol, i-propanol, dimethyl acetamide, alcoholic ammonium halide and aqueous ammonium halide and mixtures thereof to form a precipitate; and removing the halide salt from the precipitate to recover a samarium-doped oxide of titanium.

Dependencies are inferred from the claim text.