NiSe2/Cd0.5Zn0.5S as a type-II heterojunction photocatalyst for enhanced photocatalytic hydrogen evolution

A designed type-II heterojunction photocatalyst , NiSe 2 /Cd 0.5 Zn 0.5 S (NiSe 2 /CZS), was successfully synthesized and it exhibits outstanding photocatalytic hydrogen evolution performance. The optimal loading amount of NiSe 2 on Cd 0.5 Zn 0.5 S is 13 wt %, and the corresponding hydrogen production rate is approximately 121.01 mmol g −1  h −1 under visible light. The heterojunction structure between Cd 0.5 Zn 0.5 S and NiSe 2 promoted the separation of photogenerated electron-hole pairs, effectively suppressed the photogenerated carrier recombination and endowed the material with excellent interfacial charge transfer properties, thus improving the photocatalytic performance.