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In the present study, a two-step hydrothermal method was employed to synthesize Fe2O3/WS2 composites with flower-like structure, which performed significant photocatalytic activities compared with the bare components. The morphologies and structures of the as-prepared photocatalysts were characterized, as well as the surface chemical components and the optical properties. Afterwards, the photocatalytic properties of the catalysts were evaluated through degrading MB dye and reducing Cr (VI) under the simulated solar-driven irradiation. Among these photocatalysts, 2WF behaved an efficiently oxidation degradation of 20 mg/L MB solution within 20 min, more than 5 times of bare Fe2O3 nanoparticles and nearly 3 times of bare WS2 nanosheets. Besides that, it exhibited an excellent photocatalytic reduction activity on reducing 40 mg/L Cr (VI) solution within 80 min, which was far superior to bare Fe2O3 and WS2. The excellent photocatalytic oxidation and reduction abilities enabled Fe2O3/WS2 heterostructures to be applied in the field of organic and inorganic pollutant decontaminations. [ABSTRACT FROM AUTHOR]

ZnO, CeO2, TiO2, ZnO-CeO2(ZC), CeO2-TiO2, ZnO-TiO2(ZT) and ZnO-CeO2-TiO2(ZCT) powders were fabricated using a combustion synthesis (CS) method for applying to photo-degradation and decoloration of Methyl blue with them as catalysts. Ascorbic acid (C6H8O6) and nitrate were used as fuel and raw materials, respectively. The powder was obtained when the processing parameters were optimized. C6H8O6as fuel was used for the preparation of ZnO, CeO2, TiO2, ZC, CT, ZT and ZCT powders. The produced particles were characterized using scanning electron microscopy (SEM) for the particle morphology, UV for absorbent properties, IR for purity of sample, and XRD for phase, particle size and crystallinity of the samples. In addition, these particles showed good photocatalytic and decolorizing activity, which provided an opportunity for these materials to be used for the degradation and decoloration of Methyl blue. [ABSTRACT FROM AUTHOR]