A novel hierarchical Bi2MoO6/Mn0.2Cd0.8S Heterostructured Nanocomposite for Efficient Visible-light hydrogen production. (24th January 2020)

• Record Type: Journal Article
• Authors: Liu, Xiaoming; Wu, Binquan; Chen, Xueya; Yan, Liushui; Guo, Huiqin; Li, Kexin; Xu, Luping; Lin, Jun
• Is Part Of: International journal of hydrogen energy. Volume 45:Number 4(2020)
• Page Start: 2884
• Page End: 2895
• Publication Date: 2020-01-24
• Subjects: Bi2MoO6/Mn0.2Cd0.8S composites -- Heterostructure -- Hydrogen production; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2019.11.197
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: In this work, a series of Mnx Cd1-x S solid solutions as efficient photocatalysts for hydrogen evolution with visible light response were synthesized via a co-precipitation method firstly. Then, the hierarchical Bi2 MoO6 /Mn0.2 Cd0.8 S heterostructured composite was prepared by combining Mn0.2 Cd0.8 S composite with Bi2 MoO6 nanocrystalline through a hydrothermal process. The optimized Mn0.2 Cd0.8 S composite's photocatalytic activity is more than 3 times of pristine CdS and the prepared Bi2 MoO6 /Mn0.2 Cd0.8 S nanocomposites exhibited a significantly improved photocatalytic activity for hydrogen evolution from water with visible light response comparing with single Mn0.2 Cd0.8 S composite. The optimized photocatalytic activity of Bi2 MoO6 /Mn0.2 Cd0.8 S composite is around 10 times of pristine CdS. The excellent photocatalytic activity of Bi2 MoO6 /Mn0.2 Cd0.8 S composite might be ascribed to the well-matched energy band structures of the Bi2 MoO6 and Mn0.2 Cd0.8 S. Furthermore, the heterojunctions in Bi2 MoO6 /Mn0.2 Cd0.8 S composite might also do some contributions to improve its photocatalytic activities to some extent. A possible photocatalytic mechanism was proposed. Due to its excellent photocatalytic activity and good stability for hydrogen evolution from water, the obtained hierarchical Bi2 MoO6 /Mn0.2 Cd0.8 S composite has potential application in photocatalytic hydrogen evolution from water by using solar power. Graphical abstract: Ascribed to the well-matched energyband structures and heterojunction, the obtained hierarchical Bi2 MoO6 /Mn0.2 Cd0.8 S heterostructure composite exhibited a significantly improved photocatalytic activity for hydrogen evolution from water with visible light response comparing with single Mn0.2 Cd0.8 S solid solution nanocrystalline and pristine CdS. Image 1 Highlights: The Mn0.2 Cd0.8 S shows an excellent photocatalytic activity for H2 evolution. The Bi2 MoO6 /Mn0.2 Cd0.8 S exhibits a significantly high photocatalytic activity. A possible photocatalytic mechanism for Bi2 MoO6 /Mn0.2 Cd0.8 S has been proposed.