METHOD FOR PREPARATION OF TIO2-SNO2 NANOCOMPOSITES

摘要

The object of the invention is a method for the preparation of TiO 2 -SnO 2 nanocomposites which could be used to prepare composites with known and controlled chemical and phase composition and to control TiO 2 particle size in composites. The process for the preparation of TiC 2 -SnO 2 nanocomposites is characterised in that titanium hydroxide gel obtained by the hydrolysis of titanium (IV) isopropoxide in a solution at pH 3-4 is dried at a temperature of 110-120°C for 16-20 hours and subsequently calcination is conducted at a temperature of 400-560 c C for 1.5-2.5 hours and the resulting powder is dispersed in an NH 4 OH solution with pH 10-11, an aqueous SnCl 4 solution is added to the resulting solution and the reaction mixture is subjected to hydrothermal crystallisation in a three-stage temperature cycle with a temperature range of 160-180°C for 25-30 hours while stirring constantly.