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PANI/COF/BiOBr catalysts were synthesized by hydrothermal method basing on Schiff base reaction. The composites were characterized by XRD, SEM, etc., and at the same time, the photocatalytic property and degradation mechanism of PANI/COF/BiOBr catalysts were studied by degrading organic simulated dyes. The experimental results showed that the main structure of PANI/COF/BiOBr composite was flower ball structure with BiOBr main crystal type of tetragonal phase, and the degradation rates of PANI/COF/BiOBr were 1.44, 1.55 and 1.47 times of pure BiOBr for Rhodamine B, methylene blue and tetracycline hydrochloride, respectively. The free radical quenching experiment showed that h+ and e- were the most active species in the photocatalytic process. [ABSTRACT FROM AUTHOR]

The composite catalysts were prepared by two-step photothermal synthesis, and the morphology, structure and catalytic performance of the Ag/graphene/TiO2 composite were characterized by SEM, FT-IR, XRD, etc. The results showed that the composites were prepared successfully by Ag depositing on TiO2 compounded with graphene, and solid UV diffuse reflection test showed that Ag/Graphene/TiO2 composites had the greatest enhancement in the absorption of visible light. The results showed that among four kinds materials, the methyl orange's degradation rate of Ag/Graphene/TiO2 in simulated visible light reached best, whose degradion was 4.25 times that of pure TiO2. The number of photocatalytic experiments showed that Ag/Graphene/TiO2 photogenerated electrons and the corresponding generated O2· dominated the catalysis. [ABSTRACT FROM AUTHOR]