The MoS2/TiO2 heterojunction composites with enhanced activity for CO2 photocatalytic reduction under visible light irradiation

The MoS2/TiO2 heterojunction composites photocatalysts exhibits excellent photocatalytic performance, and they were resoundingly synthesized by a one-step hydrothermal experimental method combined with mild calcination (300 °C) under an argon atmosphere. Under the visible light irradiation, the photocatalytic activity of MoS2/TiO2 heterojunction composites were tested for photocatalytic reduction of CO2 and it exhibited superior performance and stability. The consequences show that the pure MoS2 demonstrates a poor photocatalytic activity because of its high electron-hole recombination, and the maximum yields of CO and CH4 on 10% MoS2/TiO2 heterojunction composite are 268.97 μmol/g.cat and 49.93μmol/g.cat, respectively, which are about 5.33 times and 16.26 times of pure TiO2 (P25). The improved photocatalytic activity of 10% MoS2/TiO2 heterojunction composite could be put down to the high-efficiency separation of photogenerated electron-hole pairs, strong response to visible light and the narrowed band gap.