The construction of a highly efficient p-n heterojunction Bi2O3/BiVO4 for hydrogen evolution through solar water splitting. (22nd January 2022)

• Record Type: Journal Article
• Authors: Shafiq, Falak; Tahir, Muhammad Bilal; Hussain, Abid; Sagir, M.; Rehman, Jalil ur; Kebaili, Imen; Alrobei, Hussein; Alzaid, Meshal
• Is Part Of: International journal of hydrogen energy. Volume 47:Number 7(2022)
• Page Start: 4594
• Page End: 4600
• Publication Date: 2022-01-22
• Subjects: Photocatalysis -- Nanostructures -- Water splitting -- Hydrogen production; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2021.11.075
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: In this manuscript, a novel p-n heterojunction Bi2 O3 /BiVO4 samples were prepared using the facile hydrothermal method, for the efficient production of hydrogen energy. The prepared samples were characterized using XRD, BET, SEM, EDX, UV–Vis absorption and PL emission spectroscopy to study the crystallographic structure, surface area, morphology, elemental composition, and optical properties. The as-prepared 3% Bi2 O3 /BiVO4 exhibited outstanding hydrogen evolution rate, through photocatalytic water splitting, of 171.13 μmol h −1 g −1, which was 16 times higher than that of pure sample. The improved photocatalytic activity could be attributed to unique crystal structure, morphology, high surface area, and extended region of visible light. This work may pave an operative way for the photocatalytic hydrogen evolution utilizing solar light. Highlights: The bismuth-based oxides have attractive photocatalytic properties under the visible light irradiation. Heterostructural thin film like structure were fabricated by wet chemical and hydrothermal method. The morphology provided active sites, and the nanosheets decreased the transport distance of the photoexcited carriers. The heterostructural composites exhibited a higher hydrogen evolution rate without sucrose.