MOFs-derived MoS2/C3N4 composites with highly efficient charge separation for photocatalytic H2 evolution

Photocatalytic hydrogen (H2) production utilizing metal organic frameworks (MOFs) as catalysts is one of the most promising methods for production of H2. However, pure MOFs have poor mechanical and chemical stability. Preparing MOF-derived materials with MOFs as templates is an effective method to improve their stability. MOFs were used as precursors to synthesise MoS2/CN by a solvothermal method. The results show that under visible-light irradiation, the material exhibits significant photocatalytic H2 production activity. Modification of CN by MOF-derived MoS2 increases the light absorption capacity and further improves photogenerated charge separation. The optimal production rate for H2 evolution was 1695.76 μmol g−1 (4 h). MoS2 and CN are uniformly dispersed and firmly connected in the catalyst, which is conducive to charge transfer. In addition, the MoS2/CN catalyst exhibited better stability for H2 production. This study provides a reference for the preparation of noble-metal-free sulfide cocatalysts using metal MOFs as self-sacrificing templates.