Fabrication of a Two-Dimensional Heterostructured MoS₂-RGO Nanocomposite for Enhanced Photocatalytic Hydrogen Evolution

The photocatalytic hydrogen evolution based on photocatalytic water splitting is a promising pathway for sustainable hydrogen production. The development of highly active, structurally stable materials with shorter-duration synthesis techniques is the key issue. In this work, nanostructured MoS2-RGO heterostructures were synthesized through a one-step rapid supercritical water process. The synthesized MoS2-RGO (5%) sample exhibits 25 mmol g–1 h–1 H2 generation, which can be considered as the highest photocatalytic activity. The addition of the RGO renders the formation of a two-dimensional heterostructure which reduces the charge recombination, as well as enhanced conductivity of the samples, that results in efficient hydrogen production with good repeatability up to 5 cycles. The main reason could be the high structural stability and fast transport of charge carriers to split water molecules into H2. This rapid ultrafast synthesis by using supercritical water is suitable for the mass production of molybdenum dichalcogenide-based photocatalysts for hydrogen generation.