以Ti(SO4)2水溶液为原料, 在水热条件下直接水解合成了锐钛型纳米TiO2颗粒。利用透射电镜(TEM)、 X射线衍射(XRD)、 BET低温吸附和紫外-可见光谱(UV-Vis)等方法对产物进行了表征, 并研究了样品光催化降解甲基橙(MO)的性能。 结果表明所制得纳米TiO2颗粒为锐钛矿型, 晶型良好, 平均粒径为24 nm, BET比表面积约为56.20 m2?g-1。 光催化活性与商品纳米TiO2(P25)相近, 具有良好的工业应用前景。(SO₄)₂ Solution under Hydrothermal Conditions and ItsPhotocatalytic Performance

Anatase-type TiO2 fine powders were synthesized under hydrothermalcondition. The precursor was obtained via precipitation route using Ti(SO4)2. Thecharacterization of the as-prepared sample was confirmed by TEM, XRD, UV-Vis andlow temperature N2 adsorption measurements(BET). The photocatalytic activity wasalso investigated by the degradation of methyl orange solutions. The particles ofthe as-synthesized sample with narrow size distribution had an average diameterof about 24 nm. The specific BET surface area of the as-synthesized sample wasabout 56 m2?g-1,which is similar to the commercial TiO2(P25). The preparedmaterials showed the similar photocatalytic activity when compared with theperformance of commercial TiO2(P25).(20060001032), 国防科工委军工遗留专项基金(科工计［2007］840)项目和国家大学生创新训练计划项目资助