以正钛酸为原料，通过直接水解法制备纳米ＴｉＯ２；并对样品分别进行了差热分析、Ｘ射线衍射分析和透射电子显微镜分析．结果表明，样品粒子为混晶型纳米ＴｉＯ２，单分散性良好，粒径分布范围狭窄．当它应用于阴离子表面活性剂十二烷基苯磺酸钠的光催化降解时，与Ｐ－２５光催化剂相比，具有较好的催化活性．同时，我们用Ａｌ２Ｏ３陶瓷膜回收纳米ＴｉＯ２循环再利用；这为纳米ＴｉＯ２在环保方面的大规模应用创造了条件．
Nanosized TiO2 particles were prepared by using the direct hydrolysis means from metatitanic acid. The specimens were characterized by transmission electron microscopy (TEM), X-ray diffractometry, differential thermal analysis. Nanosized TiO2 of mixing anatase and rutile prepared was found to show good photocatalytic properties in the photodegredation of anionic sodium dodecylbenzensulfonate surfactant, compared with P-25.
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