One-pot Synthesis of WS₂/WO₃ Heterojunction for UV-Visible-light-driven CO₂ Reduction to CO

Photocatalytic reduction of CO₂ to produce energy-rich hydrocarbons without sacrificing reagents is of great significance. Here, the 1T/2H-WS₂/WO₃ heterojunction catalyst is prepared by one-pot hydrothermal method, which shows a prominent CO₂ reduction performance with water as an electron donor, affording CO as the sole carbonaceous product at a production rate of 3.87 μmol·g⁻¹·h⁻¹ under visible light. Moreover, under UV-visible light irradiation, the 1T/2H-WS₂/WO₃ photocatalyst shows better catalytic activity and 34.39 μmol·g⁻¹·h⁻¹ yield of CO. Importantly, the stability test shows no distinctive performance degradation even after 64 h reaction. This work provides new insight for designing and fabricating semiconductor heterojunction photocatalysts with high efficiency for solar-energy conversion.