Highly stable γ-NiOOH/ZnCdS photocatalyst for efficient hydrogen evolution. (29th July 2022)

• Record Type: Journal Article
• Authors: Yang, Qianlong; Yu, Lianqing; Zhao, Xingyu; Wang, Yankun; Zhu, Haifeng; Zhang, Yaping
• Is Part Of: International journal of hydrogen energy. Volume 47:Number 64(2022)
• Page Start: 27516
• Page End: 27526
• Publication Date: 2022-07-29
• Subjects: ZnCdS -- γ-NiOOH nanosheets -- Hydrogen evolution -- Photocatalysis; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2022.06.093
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: It is extremely desirable to develop high hydrogen evolution activity and stable visible-light-driven photocatalysts. The sluggish oxidation process and holes accumulation are the main obstacles to high catalysis activity and photo-stability. An efficient γ-NiOOH/ZnCdS photocatalyst was prepared by in-situ hydrothermal method. The γ-NiOOH nanosheets distribute on ZnCdS nanospheres surface and accelerate holes transfer. The hydrogen evolution rate is up to 48.60 mmol g −1 h −1 under visible-light illumination (λ = 400–780 nm), about 10.8 times of pure ZnCdS (4.50 mmol g −1 h −1 ) and 1.8 times of general β-NiOOH modified ZnCdS (27.40 mmol g −1 h −1 ). And apparent quantum yield of γ-NiOOH/ZCS-100 is up to 18.23% (400 nm). The carrier lifetime extends from 5.50 ns (ZnCdS) to 6.10 ns (γ-NiOOH/ZCS), examined by steady photoluminescence and time-resolved photoluminescence. Moreover, the γ-NiOOH/ZCS photocatalyst has exhibited excellent photo-stability even after one-year of storage. The γ-NiOOH nanosheets can be an excellent co-catalyst on accelerating both holes transfer and oxidation process for high photo-stability and photo-activity. Graphical abstract: Image 1 Highlights: γ-NiOOH/ZnCdS photocatalysts were prepared by two steps hydrothermal. γ-NiOOH modified ZnCdS is 1.8 times of general β-NiOOH modified. Hydrogen evolution rate at 48.6 mmol g −1 ·h −1 and over one year stability.