Controlling 1T/2H heterophase junctions in the MoS2 microsphere for the highly efficient photocatalytic hydrogen evolution

The 1T/2H heterophase junction MoS2 2D nanolayer for assembly into microspheres were fabricated through a simple one-step hydrothermal synthesis. These unique junction structure MoS2 microspheres facilitate the separation of the electron-hole between different phases for forming the built-in electric field in the nanolayer. The content of 1T/2H heterophase junctions could be effectively regulated by simple changing the molar ratio of the Mo/S source in the synthesis processes. The prepared MoS2 microspheres as a photocatalyst enable the effective hydrogen production from water. The hydrogen production activity of the photocatalyst is dependent on the content of the heterophase junctions. The hydrogen production rate was the highest up to 22.4 mu mol h(-1) on the optimal sample MS (1 : 2).

Automated summary

Microspheres assembled with 1T/2H heterophase junction MoS2 2D nanolayers were successfully fabricated through a simple one-step hydrothermal synthesis, enabling efficient separation of electron-hole pairs and formation of a built-in electric field for effective photocatalytic hydrogen production. The heterophase junction content of the photocatalyst significantly affects the hydrogen production activity.