Abstract: TiO_2/HZSM-5 photocatalysts were prepared by impregnation, Sol-gel and solid state dispersion methods, using ammonium titanyl oxalate, tetrabutyl titanate and P-25 as titanium source respectively. The photocatalytic reactivity of the prepared samples for the degradation of methyl orange(MO) under UV light irradiation were investigated. The catalyst prepared by a simple, easy to control and organic-solvent-free impregnation method showed a higher photocatalytic activity than that prepared by Sol-gel and solid state dispersion methods. The structure of the catalysts were characterized by XRD,UV-Vis DRS and BET technologies. It was found that TiO_2/HZSM-5 prepared by impregnation had a higher surface area and the nano TiO_2 particles well dispersed on the surface of zeolite leading to a higher photocatalytic activity.

Key words: photocatalysis%TiO_2/HZSM-5%preparation method