Immobilization of TiO_2 and Fe-C-TiO_2 photocatalysts on the cotton material for application in a flow photocatalytic reactor for decomposition of phenol in water

摘要

TiO_2 and Fe-C-TiO_2 photocatalysts have been immobilized on the cotton material and used in a flow photocatalytic reactor for phenol decomposition. The cotton material has been applied as a support for photocatalyst, because can be easily removed and replaced in a reactor, what facilitates the performance of the photocatalytic process. Fe-C-TiO_2 photocatalyst has been prepared by modification of TiO_2 fine particles of anatase structure with FeC_2O_4 through heating in Ar at 500 ℃. The immobilized photocatalysts could efficiently decompose phenol in multiple use, Fe-C-TiO_2 showed higher photocatalytic activity than TiO_2, around 15-18 mg and 15-16 mg of phenol have been decomposed after 5 h of UV irradiation on Fe-C-TiO_2 and TiO_2, respectively. After addition of H_2O_2 the phenol decomposition and the mineralization degree have been accelerated, especially with immobilized Fe-C-TiO_2 photocatalyst, in case of that the photo-Fenton reaction occurred. In the presence of H_2O_2 around 26-28 mg and 21-24 mg of phenol have been decomposed on Fe-C-TiO_2 and TiO_2 respectively, after 5 h of UV irradiation.