Visible light photodegradation of dyes over mesoporous titania prepared by using chrome azurol S as template

摘要

Mesoporous TiO2 with anatase crystalline structure (MTiO2/CAS) has been synthesized by using chrome azurol S (CAS, 2aEuro(3),6aEuro(3)-dichloro-3,3'-dimethyl-4'-hydroxy-3aEuro(3)-sulfofuc hson-5,5'-dicarboxylic acid) as template. It was characterized by X-ray diffraction, nitrogen adsorption/desorption, diffuse reflectance UV-visible and FT-IR spectrometry, and transmission electron microscopy. It was found that MTiO2/CAS had substantial photocatalytic activity in the degradation of methylthionine chloride, rhodamine B, gentian violet, safranin T, methyl violet, and fuchsine basic whereas Degussa P25 (P25) had negligible photodegradation yield (< 6%) under visible light irradiation.