The photocatalytic hydrogen evolution enhancement of the MoS2 lamellas modified g-C3N4/SrTiO3 core-shell heterojunction. (December 2020)

• Record Type: Journal Article
• Authors: Pan, Jiaqi; Liu, Yanyan; Ou, Wei; Li, Shi; Li, Hongli; Wang, Jingjing; Song, Changsheng; Zheng, Yingying; Li, Chaorong
• Is Part Of: Renewable energy. Volume 161(2020)
• Page Start: 340
• Page End: 349
• Publication Date: 2020-12
• Subjects: Photocatalytic hydrogen evolution -- MoS2 lamellas -- Core-shell heterojunction -- Stability; Renewable energy sources -- Periodicals; Power resources -- Periodicals; Énergies renouvelables -- Périodiques; Ressources énergétiques -- Périodiques; 333.794
• DOI: 10.1016/j.renene.2020.07.097
• Languages: English
• ISSNs: 0960-1481

Abstract

Abstract: The MoS2 lamellas modified g-C3 N4 /SrTiO3 core-shell heterojunction is prepared via a simple continuous hydrothermal-annealing method. There, the g-C3 N4 shell is deposited on the surface of as-prepared SrTiO3 nanosphere, and then the MoS2 lamellas grow on the surface of core-shell heterojunction. Evaluated by the hydrogen evolution, the as-prepared MoS2 /g-C3 N4 /SrTiO3 core-shell heterojunction exhibits an obvious photocatalytic enhancement of about ∼30 folds than single SrTiO3 nanospheres, which can be mainly ascribed to that, the core-shell heterojunction can promote the charge carriers separation efficiently and the Pt-like behavior MoS2 can promote the photo-generated electrons diffusing into water quickly. Additionally, the ultrathin MoS2 lamellas with a mass of edge S atoms can provide sufficient HER active sites and shorten photoelectron transport route to improve photocatalytic stability. Graphical abstract: Image 1 Highlights: Pt-like behavior MoS2 can capture/diffuse photo-electron into water quickly . Core-shell heterojunction can excit/separate photo-generated carriers efficiently. Ultrathin lamellas can shorten transfer route to promote photo-electron diffusing. MoS2 lamellas can provide sufficient HER active sites.