Preparation of Fe;2;O;3;/WS;2;heterostructures with enhanced photocatalytic performances for dye degradation and Cr (Ⅵ) reduction

作者：Jia nan Yin; Shu Wang; Yong xin Jiao

来源：Ferroelectrics, 2022, 594(1): 33-43.

DOI：10.1080/00150193.2022.2078114

• Heterostructure
• Photocatalyst
• Characterization
• Composite
• CLC number: O0474 Document code: A

In the present study, a two-step hydrothermal method was employed to synthesize Fe\u003csub\u003e2\u003c/sub\u003eO\u003csub\u003e3\u003c/sub\u003e/WS\u003csub\u003e2\u003c/sub\u003e 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 Fe\u003csub\u003e2\u003c/sub\u003eO\u003csub\u003e3\u003c/sub\u003e nanoparticles and nearly 3 times of bare WS\u003csub\u003e2\u003c/sub\u003e 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 Fe\u003csub\u003e2\u003c/sub\u003eO\u003csub\u003e3\u003c/sub\u003e and WS\u003csub\u003e2\u003c/sub\u003e. The excellent photocatalytic oxidation and reduction abilities enabled Fe\u003csub\u003e2\u003c/sub\u003eO\u003csub\u003e3\u003c/sub\u003e/WS\u003csub\u003e2\u003c/sub\u003e heterostructures to be applied in the field of organic and inorganic pollutant decontaminations.