Enhanced CO2 conversion to CO using an S-scheme 2D/2D WO3/ InVO4 photocatalysts

Photocatalysis technology holds great potential in converting CO2 into value-added chemicals and fuels, playing a significant role in achieving carbon neutrality and promoting carbon cycling. However, the low charge carrier separation efficiency of existing photocatalysts limits their performance in CO2 utilization. Herein, a novel Sscheme structured 2D/2D WO3/InVO4 composite is successfully synthesized via hydrothermal method, which maintains the high selectivity for converting CO2 to CO under visible light without the need for noble metal cocatalysts or sacrificial agents. The optimized WO3/InVO4 composite exhibits CO yields of 13.37 mu mol/g, which is 3.36 times higher than that of InVO4. Enhancement in photocatalytic performance is primarily attributed to the meticulously designed S-scheme heterojunction structure, which effectively achieves spatial separation of photogenerated charges. Furthermore, the intimate contact between 2D WO3 and 2D InVO4 enhances charge transfer efficiency. This work offers valuable insights for the design and construction of novel S-scheme heterojunction photocatalysts.