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The unique ability of tungsten oxide (WO3) to absorb light in the visible region with a spectral range of 480 nm and longer has drawn a lot of attention. It has various advantages, including low cost, low toxicity, easy availability, recyclability, and chemical stability. There have been a number of recent applications for WO3-based catalysts and photocatalysts, such as the degradation of organic pollutants, hydrogen evolution, heavy metal treatment, CO2 photoreduction, self-cleaning, air purification, etc. For organic processes such as cross-coupling, oxidation reactions, and heterocycle synthesis, we evaluate the literature on WO3-based catalysts or photocatalysts and the mechanisms involved in these reactions. We hope that this short review will help researchers make high-performance and cheap WO3-based catalysts that can be used in a lot of organic processes. [ABSTRACT FROM AUTHOR]

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]