TiOSO_4热水解法制备超细TiO_2颗粒光催化剂

Nanometer TiO_2 Photocatalyst Prepared by Thermohydrolysis of TiOSO_4 Solution

采用廉价的 Ti OSO4为原料 ,通过热水解反应制备超细 Ti O2 颗粒光催化剂 ,探讨了不同制备条件对光催化性能的影响 ,并采用 XRD、TEM、BET、TG- DTG- DTA对催化剂进行表征 ,初步说明 Ti O2 光催化活性与其晶型、粒径大小、比表面等微结构的关系。结果表明 ,经 1 60°C热处理制备的 Ti O2 粉末是球形和多孔型结构 ,比表面积约为 1 70 m2 /g,只有锐钛型单一晶相为无定型组成 ,颗粒平均粒径为 2 0 nm,其光催化活性与商业化 Degussa P2 5 Ti O2

Nanometer TiO 2 photocatalyst was prepared by thermohydrolysis of low cost TiOSO 4 solution. The influences of synthetic conditions on TiO 2 were investigated. The behaviors of TiO 2 photocatalyst were characterized by XRD, TEM, BET and TG DTG DTA. The product of photocatalyst which is heated at 160 °C 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 TiO 2 crystal and amorphous structure. The catalyst activity is as good as Degussa P25 TiO 2.