Fabrication of WO3 nanorod/graphene/BiV1−xMoxO4 heterojunction photoelectrode for efficient photoelectrochemical water splitting

We report the fabrication of a novel WO 3 nanorod/graphene/BiV 1− x Mo x O 4 heterojunction photoelectrode for photoelectrochemical (PEC) water splitting. The heterojunction arrays were fabricated via a hydrothermal deposition of WO 3 nanorods on FTO glass, with subsequent depositing of graphene nan...

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Bibliographic Details
Published in:Journal of materials science. Materials in electronics 2020-02, Vol.31 (4), p.3323-3331
Main Authors: Gu, Manman, Zhang, Hui, Ji, Jiuyu, Pei, Xiaomin
Format: Article
Language:English
Subjects:
Characterization and Evaluation of Materials
Charge transfer
Chemistry and Materials Science
Electron transfer
Graphene
Heterojunctions
Materials Science
Nanorods
Optical and Electronic Materials
Photoelectric effect
Photoelectric emission
Quantum efficiency
Silver chloride
Spin coating
Tungsten oxides
Water splitting
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Summary:We report the fabrication of a novel WO 3 nanorod/graphene/BiV 1− x Mo x O 4 heterojunction photoelectrode for photoelectrochemical (PEC) water splitting. The heterojunction arrays were fabricated via a hydrothermal deposition of WO 3 nanorods on FTO glass, with subsequent depositing of graphene nanosheets and BiV 1− x Mo x O 4 by spin-coating method, respectively. The structure of materials and PEC water splitting properties of the photoelectrodes were systemically investigated. The heterojunction exhibits an enhanced photocurrent density (2.27 mA/cm 2 at 0.9 V vs. Ag/AgCl), which leads to a significant improvement in photoconversion efficiency (1.00% at about 0.7 V vs. Ag/AgCl). This remarkable PEC performance is mainly due to the constructive effect of the graphene (RGO) in expediting electron transfer and reducing charge recombination to realize enhanced use ratio of photo-generated carriers for the water splitting reaction. This result demonstrates the superiorities of the new graphene-mediated composites photoelectrode and provides a promising route for high-performance photoelectrochemical systems.
ISSN:0957-4522
1573-482X
DOI:10.1007/s10854-020-02880-3