화학공학소재연구정보센터
Journal of the American Ceramic Society, Vol.85, No.5, 1333-1335, 2002
Direct formation of zirconia-doped titania with stable anatase-type structure by thermal hydrolysis
Nanoparticles of anatase-type titania (TiO2) doped with zirconia (ZrO2) were directly synthesized from acidic precursor solutions of TiOSO4 and Zr(SO4)(2) by simultaneous hydrolysis, under mild hydrothermal conditions, at 200degrees and 240degreesC. Doping ZrO2 into TiO2 suppressed the crystal growth of anatase and shifted the phase transformation from anatase-type to rutile-type structure to a high temperature. The presence of an anatase-type structure with high crystallinity and high phase stability, even after annealing at 1000degreesC for 1 h, was fully achieved by both the doping of ZrO2 into TiO2 through direct precipitation and the simultaneous hydrolysis of the sulfate solutions.