Synthesis of TiO2 nanoparticles with pure brookite at low temperature by hydrolysis of TiCl4 using HNO3 solution

Pure brookite-type Titanium dioxide (TiO2) nanoparticles were synthesized by hydrolyzing titanium tetrachloride (TiCl4) using HNO3 solution. TiCl4 was hydrolyzed by adding 1.0-8.0 M HNO3 solution was added to the stock solution to prepare transparent aqueous titanium tetrachloride solution with varying dropwise to prepare stock solution. The solution was poured into reactor and placed in the oven at 60-150 ° C for precipitation. TiO2 precipitates were repeatedly cleaned by distilled water and dried at 70° C to obtain the nanoparticles. Results show that the nanoparticles are efficiently prepared by heating TiCl4 with not more than 0.8 M of Ti4+.