MoS 2 as a Co-Catalyst for Photocatalytic Hydrogen Production: A Mini Review.

Molybdenum disulfide (MoS 2 ), with a two-dimensional (2D) structure, has attracted huge research interest due to its unique electrical, optical, and physicochemical properties. MoS 2 has been used as a co-catalyst for the synthesis of novel heterojunction composites with enhanced photocatalytic hydrogen production under solar light irradiation. In this review, we briefly highlight the atomic-scale structure of MoS 2 nanosheets. The top-down and bottom-up synthetic methods of MoS 2 nanosheets are described. Additionally, we discuss the formation of MoS 2 heterostructures with titanium dioxide (TiO 2 ), graphitic carbon nitride (g-C 3 N 4 ), and other semiconductors and co-catalysts for enhanced photocatalytic hydrogen generation. This review addresses the challenges and future perspectives for enhancing solar hydrogen production performance in heterojunction materials using MoS 2 as a co-catalyst.