Enhanced efficiency and stability of Co0.5Cd0.5S/g-C3N4 composite photo-catalysts for hydrogen evolution from water under visible light irradiation. (2nd March 2017)

• Record Type: Journal Article
• Authors: Fang, Xueyou; Song, Jialing; Shi, Huancong; Kang, Shifei; Li, Yaguang; Sun, Guanwu; Cui, Lifeng
• Is Part Of: International journal of hydrogen energy. Volume 42:Number 9(2017)
• Page Start: 5741
• Page End: 5748
• Publication Date: 2017-03-02
• Subjects: Co0.5Cd0.5S/g-C3N4 composite -- Photocatalysts -- Hydrogen production -- Stability -- Visible light; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2016.12.081
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: A simple hydrothermal process was developed to synthesize Co0.5 Cd0.5 S/g-C3 N4 composite photocatalysts. The crystal structure and surface morphology were characterized with XRD and TEM. The chemical state on the material surface, the chemical structure as well as the ultraviolet–visible light response of the photocatalyst were investigated with XPS and UV–vis DRS. The hydrogen production experiments indicated that the Co0.5 Cd0.5 S catalyst exhibits enhanced efficiency and stability with the addition of g-C3 N4, which effectively inhibited the occurrence of photo-corrosion and promoted the separation efficiency of the photogenerated electron–hole pairs. The highest rate of H2 generation from the composite catalyst is up to 6.31 mmol g −1 h −1 under visible light (λ > 400 nm). Highlights: Co0.5 Cd0.5 S/g-C3 N4 composites are synthesized by a one-step hydrothermal method. The photocatalytic activity of the composites was greatly improved compared to pure CdS nano-particles. The stability of photocatalyst is enhanced after the addition of g-C3 N4 . Co0.5 Cd0.5 S with 10 wt% g-C3 N4 addition shows a high H2 evolution rate of 6.31 mmol h −1 g −1 under visible light irradiation.