TiO_2/高岭石负载型催化剂的制备与表征

Preparation and characterization of kaolin-suported TiO_2 photocatalyst

以高岭石颗粒为载体,采用TiCl4水解法制备TiO2/高岭石负载型催化剂。以SEM、IR、XRD、BET方法对其进行了表征。SEM观察到催化剂的表面形貌有了较大的变化,IR、BET结果表明有部分TiO2插入高岭石层间。以草酸为目标降解物考察其光催化活性,结果表明所制得的TiO2/高岭石负载型催化剂的光催化活性比对比样品纳米TiO2高,同时探讨了焙烧温度对催化剂光催化活性的影响。

TiO2/kaolin composite photocatalysts were prepared from kaolin particles by the titanic chloride hydrolysis method and the structure were characterized by IR, SEM, X-ray and BET techniques. It is showed by the IR and BET results that TiO2 is partly entered into the layers of kaolin. The composite catalytic activities were evaluated by photocatalytic reaction of oxalic acid. Compared with unloaded nano-TiO2 , this preparation leads to a highly active photocatalyst. Meanwhile calcination temperature effecting on photocatalytic activity of the TiO2/kaolin composite was also studied.