多孔TiO2薄膜的制备及其光催化活性

采用溶胶一凝胶法在玻璃片和玻璃纤维两种基体上制备了多孔TiO2薄膜，对甲基橙水溶液的光催化降解实验表明：在一定范围内，随着TiO2镀层层数的增加，薄膜的光催化活性增强；且相同条件下，以玻璃纤维为基体的薄膜的光催化活性明显优于以玻璃片为基体的薄膜的活性。

Preparation and Photo-catalytic Activity of the Porous TiO_2 Thin Films

The porous TiO 2 thin films on both of carriers, glass sheet and glass fiber, are prepared from titanium alkoxide solution containing polyethylene glycol (PEG) by a dip coating technique. The photo catalytic degradation experiments show that methyl orange aqueous solution is efficiently decolorized in the presence of the porous TiO 2 thin films by illumination with a high pressure mercury lamp. The photo catalytic activity of the TiO 2 thin films is enhanced with the increase of the coating cycles or the PEG addition to the precursor solution. Under the same condition, the photo catalytic activity of the porous TiO 2 thin films on glass fiber is better than that of the porous TiO 2 thin films using glass sheet as carriers.