Synthesis of TiO_2 and F-Doping TiO_2 Powders Via 'Reverse' Hydrolysis of Titanium Tetraisopropoxide

摘要

TiO_2 and F-TiO_2 powders were prepared by hydrolysis of titanium tetraisopropoxide with reversed mixing of different hydrolytic reagents. The type of the hydrolytic agentstronglyinfluencesparticle size, morphology and phase composition of powder. It was found, that the amount of injected water is significantly affectson BET surface area and particle size ofbareTiO_2. The presence of fluorinemakes the samplemore porous and preventsanatase to rutile phase transformation under prolonged heat treatment, also particle formed are bigger in comparison with un-doped TiO_2.