Red/Black Phosphorus Z-Scheme Heterogeneous Junction Modulated by Co-MOF for Enhanced Photocatalytic Hydrogen Evolution

A novel composite photocatalyst RP/BP/Co-MOF was prepared for highly efficient photocatalytic hydrogen evolution. Metal-organic frameworks Co-MOF was used as an electron transfer medium in composite photocatalyst, it accelerated the electron transfer rate between red phosphorus and black phosphorus. It had played an important role in RP/BP Z-scheme heterojunction system. Under simulated visible light exposure, the hydrogen production amount of the composite photocatalyst RP/BP/Co-MOF was 632.4 mu mol in 5 h, which was 44.82 times as much as RP/BP flake. At the same time, a series of characterization of the composite photocatalyst was carried out. The results of photoluminescent spectroscopy and electrochemical measurements showed that the combination of RP/BP Z-scheme heterojunction and 2D sheet Co-MOF could effectively inhibit the recombination of photogenerated carriers, promote the transfer of electrons and improve the photocatalytic activity of the composite photocatalyst. This work provided an important way to develop a low-cost photocatalyst with high hydrogen yield. Graphic Abstract Red/Black phosphorus Z-Scheme heterogeneous junction modulated by Co-MOF for enhanced photocatalytic hydrogen evolution. The enlarged part shows the structure structure of Co-MOF. C: black; N: light blue; Co: purple. Hydrogen atoms are omitted for clarity. [GRAPHICS] .