NiSe2/Cd0.5Zn0.5S as a type-II heterojunction photocatalyst for enhanced photocatalytic hydrogen evolution. (26th April 2021)

• Record Type: Journal Article
• Authors: Zhang, Xue; Cheng, Zhiwei; Deng, Puhui; Zhang, Linping; Hou, Yu
• Is Part Of: International journal of hydrogen energy. Volume 46:Number 29(2021)
• Page Start: 15389
• Page End: 15397
• Publication Date: 2021-04-26
• Subjects: Nickel selenide -- Cd0.5Zn0.5S -- Hydrogen evolution -- Photocatalyst -- Type-II heterojunction; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2021.02.018
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: A designed type-II heterojunction photocatalyst, NiSe2 /Cd0.5 Zn0.5 S (NiSe2 /CZS), was successfully synthesized and it exhibits outstanding photocatalytic hydrogen evolution performance. The optimal loading amount of NiSe2 on Cd0.5 Zn0.5 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 Cd0.5 Zn0.5 S and NiSe2 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. Graphical abstract: A type-II heterojunction photocatalyst, NiSe2 /Cd0.5 Zn0.5 S, with superior hydrogen production performance was successfully prepared. The formation of heterojunction provided a transfer channel to accelerate the electron transfer rate and suppressed the recombination of photogenerated electron-hole pairs. Image 1 Highlights: Coral-like NiSe2 supported on Cd0.5 Zn0.5 S as a type-II heterojunction photocatalyst. Photocatalytic hydrogen evolution performance was significantly enhanced. Heterojunction structure improves the light utilization and charge separation.