摘要
采用具有锐钛矿晶粒的TiO2溶胶与聚苯乙烯球形粒子混合制得涂膜液,通过浸渍提拉法制备薄膜,然后在超声波振荡条件下,以甲苯为溶剂,将薄膜中的聚苯乙烯球选择性地溶解去除,在室温下获得了锐钛矿型多孔TiO2薄膜.与致密的TiO2薄膜相比,该多孔TiO2薄膜具有较高的光催化活性.该方法有以下两方面的优点:一是实现了多孔TiO2薄膜的室温制备,增大了薄膜基材的选择范围;二是可以通过添加不同粒径的聚苯乙烯球,较为方便地实现了对薄膜孔径的调节.
Anatase TiO2 films were prepared from a solution of polystyrene spheres and anatase TiO2 colloidal particles by a dip-coating technique. Polystyrene spheres in the films were then preferentially dissolved in toluene, and porous anatase TiO2 films were obtained. The porosity of the films induces effective adsorption of rhodamine B on the TiO2 surface, and thus the photocatalytic activity is enhanced. This preparation method has two advantages. First, the annealing step in typical process is avoided and various substrates can be used. Second, it is facile to control the aperture of the porous films by adding as-prepared polystyrene spheres with different diameters.
出处
《催化学报》
SCIE
CAS
CSCD
北大核心
2007年第2期153-157,共5页
基金
浙江省科技计划项目(2005C24005).
