Synergistic conversion of CO2 into C1 and C2 gases using hybrid in-doped TiO2 and g-C3N4 photocatalysts

Achieving high-efficiency photocatalytic conversion of CO2 into value-added chemicals remains a challenge. This study synthesizes In-doped TiO2 and g-C3N4 composites (In-TiO2/g-C3N4) via facile reliable method. The as-synthesized In-TiO2/g-C3N4 produces CO, CH4, C2H4 under UV, CO CH4 visible light from gaseous H2O vapor. A prolonged photocatalysis results in the continuous production same set carbonaceous compounds over 30 h, with photonic yield ∼ 40%. is 11-times greater than sum In-TiO2 g-C3N4. adsorption isotherms show that acts as adsorbent photocatalyst whereas mainly works photocatalyst. In-situ FTIR reveals formation on In-TiO2/g-C3N4. Time-resolved photoluminescence indicate In-doping facilitates charge transfer strongly coupled induces cascaded transfer. leads to inhibited recombination long-lived carriers.