Abstract
Nanometer-sized particles of anatase-type TiO2 doped with ZrO2 up to 9.8 mol% were directly formed from acidic precursor solutions of titanium(III) sulfate (Ti2(SO4)3) and zirconium sulfate (Zr(SO4)2) in the presence and absence of ammonium peroxodisulfate ((NH4)2S2O8) by simultaneous hydrolysis under hydrothermal condition at 200°C. Although yield of TiO2 from Ti2(SO4)3 solution was accelerated at 100~180°C via the presence of (NH4)2S2O8, nanoparticles of ZrO2-doped anatase could be formed under hydrothermal condition at 200°C for 24 h in the absence of (NH4)2S2O8. Crystallite size of anatase decreased with increasing doped ZrO2 content. Doping ZrO2 into TiO2 retarded the phase transformation from anatase-type to rutile-type structure and the anatase-type structure was maintained after heating at 1000°C for 1h.
