Ti(SO4)2水解-水热法制备锐钛型纳米TiO2及其光催化性能

Preparation of Anatase-Type TiO_2 Nanoparticals from Ti(SO_4)_2 Solution under Hydrothermal Conditions and Its Photocatalytic Performance

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。

Anatase-type TiO2 fine powders were synthesized under hydrothermal condition. The precursor was obtained via precipitation route using Ti（SO4）2. The characterization of the as-prepared sample was confirmed by TEM, XRD, UV-Vis and low temperature Nz adsorption measurements（BET）. The photocatalytic activity was also investigated by the degradation of methyl orange solutions. The particles of the as-synthesized sample with narrow size distribution had an average diameter of about 24 nm. The specific BET surface area of the as-synthesized sample was about 56 m^2· g^-1 ,which is similar to the commercial TiO2 （P25）. The prepared materials showed the similar photoeatalytie activity when compared with the performance of commercial TiO2（P25）.