Design and preparation of a ternary MoC-QDs/C/Mo-S heterojunction for enhanced eosin Y-sensitized photocatalytic hydrogen evolution

The catalyst MoC-QDs/C has a sufficient surface area and a unique lamellar structure, which provides a suitable position for the loading of Mo-S, so that the close contact and interfacial compatibility between MoC-QDs/C and Mo-S, and the smooth transfer of electrons through the carbon film (C) can be ensured. The catalyst MoC-QDs/C contains a large number of carbon films, and the carbon films have excellent conductive properties, so it can be used as a transfer channel for electrons to be transferred effectively, and the transferred electrons can be transmitted to MoC-QDs in time. The MoC-QDs act as the catalytic active center, which can effectively reduce H + to H 2 by the obtained electrons. This unique design can effectively separate the photogenerated electron-holes and promote the photocatalytic splitting of water for hydrogen production. By optimizing the composite catalyst, the best composite material 10%-MCC/M-S was obtained, which showed excellent hydrogen production activity (198.15 μmol) that was 2.67 times that of pure Mo-S (74.29 μmol) within 5 h, and the stability of the catalyst was proved by the cycle experiment. This work offers a new strategy and direction for the application of carbon films in the field of photocatalytic water decomposition for hydrogen production. Carbon film contributes to the separation of photogenerated carriers in the process of photocatalytic hydrogen evolution.