METHOD OF PRODUCING PHOTOCATALYTIC NANOCOMPOSITE CONTAINING TITANIUM DIOXIDE Russian patent published in 2011 - IPC C01G23/53 B82B1/00 B01J21/06 

FIELD: chemistry.

SUBSTANCE: invention can be used for photocatalytic treatment of water and air from organic compounds and pathogenic flora, with photocatalytic decomposition of water. In order to obtain a photocatalytic nanocomposite containing titanium dioxide, a transition metal salt is added in amount of 1.5-60 wt % in terms of metal to a titanium (IV) salt solution with concentration of 1.0-2.5 mol/l TiO₂ while stirring and the salts undergo hydrolysis in ammonium hydroxide solution at 15-25°C for 0.1-0.25 hours with formation of a precipitate. The obtained precipitate is settled for 1.5-2.0 hours, separated, washed and thermally processed at 80-800°C for 0.5-1.0 hours. The titanium (IV) salt used is a chloride or sulphate, the iron (III) salt used is a chloride, sulphate or nitrate, the niobium (V) salt used is a fluoride and the tungsten (VI) salt used is sodium tungstate.

EFFECT: invention enables to increase photocatalytic activity of the titanium dioxide-based nanocomposite in the visible light region, lowers hydrolysis temperature and shortens duration of the method.

9 cl, 1 tbl