Metal Sulfide Semiconductors for Photocatalytic Hydrogen Production from Waste Hydrogen Sulfide

Hydrogen sulfide (H2S), owing to the extremely toxic, malodorous and corrosive nature, is a detrimental and undesirable environmental pollutant widely generated in the petrochemical industry. How to handle H2S effectively and convert it into highly-valued products is vital. Photocatalysis is one of the most ideal routes to realize the resource utilization of H2S. Recently, metal sulphides are widely used as desirable photocatalysts for H-2 production from waste H2S due to their remarkable visible-light response, proper band structure and strong resistance against H2S poisoning. Here, we summarize the current status, and challenges of this field. The photocatalytic H2S splitting mechanism are overviewed in different reaction medium. Particularly, promising strategies for highly efficient photocatalytic conversion of H2S are systematically discussed, which is aimed to inspire researchers interested in this field. Finally, some challenges in the H2S splitting process and their future research directions are outlined.