摘要：采用TiOSO4 热水解法制备超细TiO2 粉末光催化剂 ,探讨了不同制备条件对光催化性能的影响 ,采用XRD、TEM、BET、TG -DTG -DTA对催化剂进行表征 ,初步说明TiO2 光催化活性与其晶型、粒径大小、比表面等微结构的关系。实验结果表明 ,在 16 0℃热处理下制备的TiO2 粉末是球形和多孔型结构 ,比表面积约为 170m2 / g ,只有锐钛型单一晶相和无定型组成 ,颗粒平均粒径为 2 0nm ,其光催化活性与商业化DegussaP2 5TiO2 超细粉末相近。
关键词：热水解法；光催化剂；二氧化钛
Abstract：The photocatalyst of TiO 2 ultrafine powders were prepared by the means of thermohydrolysis of the TiOSO 4 solution.The influences of synthetic conditions for TiO 2 were investigated.The behaviors of TiO 2 photocatalyst was characterized by X-ray diffraction,TEM,BET mothods and TG-DTG-DTA methods.The product of photocatalyst which is heated at 160℃ for four hours can be obtained,with a primary particle diameter of 20nm and a specific surface area of 170m 2/g. The photocatalyst particles were spherical and porous,with anatase crystal TiO 2 and amorphous structure.The catalyst activity is as good as Degussa P25 TiO 2.
Keywords：thermohydrolysis;photocatalyst;titanium dioxide
