Preparation and photocatalytic activity of TiO_2/opal composite

摘要

Opal as a carrier, tetrabutyl titanate as a titanium source, TiO_2 loaded on opal was prepared by sol-gel technique. The photocatalysts were characterized by XRD, TEM and UV-VIS absorption spectrum. Their photocatalytic activities were examined by the photocatalytic decolorization of methylene blue solution under UV light irradiation. The effects of calcination temperature, the amount of TiO_2 loading and pH on photocatalytic activities were discussed. The results show that TiO_2 supported on opal induced enhancement of photocatalytic decolorization rant and TiO_2 doping is about 30 wt.% with 92.15% of decolorization rate at 700°C.