Recent advances, modification strategies and perspectives of BiWO in photocatalytic CO reduction reaction.

With the development of the global economy and the continuous consumption of fossil energy, a large amount of greenhouse gas CO has been emitted into the atmosphere. Therefore, how to reduce the concentration of CO in the atmosphere and convert it into high value-added products has gradually become a hot spot in scientific research. Photocatalytic CO reduction technology can combine semiconductor with solar energy to convert CO into high value-added organic carbon source through photocatalysis, which is of great significance for the effective utilization of solar energy and the emission reduction of CO. After decades of exploration, many effective photocatalysts have been discovered. Among them, BiWO with visible light absorption ability, as a new-type bismuth-based catalyst, has been widely studied due to its unique two-dimensional layered structure, stability, low cost and non-toxicity, et al. In this review, recent Advances of BiWO in photocatalytic CO reduction reaction are summarized, including reaction mechanism, product selective regulation, In-situ Fourier transform infrared spectra application, density functional theory calculation, and various modification strategies. Finally, based on the in-depth understanding of the above advances, the future modification strategies and design ideas of BiWO in the field of photocatalytic CO research are proposed. This has important practical significance for the latter design and development of BiWO-based composite photocatalysts with high CO conversion performance.