Synthesis of rutile and anatase TiO_2 nanoparticles from Ti-peroxy compound aqueous solution with polyols

摘要

Ti-peroxy compound was synthesized from Ti(O-iPr)_4 and H_2O_2. Anatase and rutile TiO_2 nanoparticles were prepared by heating the Ti-peroxy compound diluted with a polyol aqueous solution at 368 K for 24 h. In this research, ethylene glycol, glycerin, erythritol, and D-mannitol were used as polyols in the diluting solution. The ratio of anatase/rutile of the TiO_2 obtained depended on the polyol concentration in the diluting solution. Furthermore, the polyol concentration at which single-phase anatase could be obtained was lowest when the number of OH groups in the polyol molecule was the highest. With increasing polyol concentration, the obtained TiO_2 nanoparticles showed increasing specific surface area and decreasing particle size.