Abstract: 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.

摘要： 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。