2D MOFs enriched g-C3N4 nanosheets for highly efficient charge separation and photocatalytic hydrogen evolution from water. (28th January 2019)

• Record Type: Journal Article
• Authors: Liang, Yinghua; Shang, Rong; Lu, Jinrong; An, Weijia; Hu, Jinshan; Liu, Li; Cui, Wenquan
• Is Part Of: International journal of hydrogen energy. Volume 44:Number 5(2019)
• Page Start: 2797
• Page End: 2810
• Publication Date: 2019-01-28
• Subjects: 2D-2D heterostructure -- g-C3N4 -- UMOFNs -- Photocatalyst -- H2 evolution; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2018.12.036
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: Here we report a 2D-2D heterostructure of g-C3 N4 /UMOFNs photocatalysts via mechanical grinding two kinds of two-dimensional nanosheets of g-C3 N4 nanosheets and UMOFNs, which exhibits enhanced H2 evolution from water with simulated solar irradiation. g-C3 N4 nanosheets are in close contact with UMOFNs, and there is a certain interaction between them, showing the effect of superimposition on the two-dimensional layer. The 2D-2D heterostructure offers a maximal photocatalytic hydrogen production activity of 1909.02 μmol g −1 h −1 with 3 wt% of UMOFNs, which is 3-fold higher than that of g-C3 N4 nanosheets (628.76 μmol g −1 h −1 ) and 15-flod higher than that of bulk g-C3 N4 (124.30 μmol g −1 h −1 ). The significant increasement of photocatalysis is due to 2D-2D heterostructure possessing a short charge transfer distance and large contact area between g-C3 N4 and UMOFNs. The highly dispersed NiO, CoO and π-π bonds in UMOFNs of 2D-2D structure also promote charge transfer and enhance the photocatalytic activity. Graphical abstract: Highlights: The g-C3 N4 /UMOFNs displays a highly efficient H2 evolution from H2 O. The novel composite photocatalysts have more contact areas and active sites. The highly dispersed NiO, CoO and π-π bonds can promote charge transfer. The 2D-2D heterostructures possess a short charge transfer distance.