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Facile synthesis of heterojunctions by hydrothermal decoration of CdS on electrospun BiVO4 nanofibers with boosted photocatalytic activity.

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Title: Facile synthesis of heterojunctions by hydrothermal decoration of CdS on electrospun BiVO4 nanofibers with boosted photocatalytic activity.
Authors: Peng, Long-Gui1 (AUTHOR), Ni, Fu-Rong1 (AUTHOR), Liu, Jun1 (AUTHOR) jun_liu@xust.edu.cn, Sun, Meng1 (AUTHOR), Chang, Meng-Jie1 (AUTHOR), Xi, Tong1 (AUTHOR), Li, Hui-Lu1 (AUTHOR), Du, Hui-Ling1 (AUTHOR), Yang, Jie2 (AUTHOR), Li, Ying1 (AUTHOR)
Source: Journal of Materials Science: Materials in Electronics. Aug2021, Vol. 32 Issue 15, p20891-20902. 12p.
Subjects: Photocatalysts, Hydrothermal synthesis, Nanofibers, Visible spectra, Light absorption, Heterojunctions
Abstract: Bismuth vanadate (BiVO4) is a promising photocatalyst material for photocatalytic degradation of organic pollutions. However, the fast recombination of photo-induced charge and insufficient light absorption often lead to poor photocatalytic performance. Herein, novel fibrous BiVO4/CdS (BVO/CdS) heterostructures are constructed by uniformly modifying caterpillar shaped electrospun BiVO4 nanofibers with controllable quantity of CdS nanoparticles through hydrothermal reaction. The absorption of visible light and separation efficiency of photo-generated charge of BiVO4 are significantly promoted after the decoration of CdS nanoparticles. As a result, the photocatalytic efficiency of the optimized BVO/CdS sample (BVO/CdS-2 stands for the sample synthesized with 0.05 mmol Cd(CH3COO)2 and CH4N2S) is 90.43%, which is 3.3 times as high as that of pure BiVO4 after 180 min irradiation under visible light, respectively. Moreover, the.O2− and.OH are the predominant active species for the degradation process indicated by scavengers added photocatalytic experiments. Due to the simple, low-cost and controllable synthetic process, the BVO/CdS heterojunctions are suitable for practical usage. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
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Abstract:Bismuth vanadate (BiVO4) is a promising photocatalyst material for photocatalytic degradation of organic pollutions. However, the fast recombination of photo-induced charge and insufficient light absorption often lead to poor photocatalytic performance. Herein, novel fibrous BiVO4/CdS (BVO/CdS) heterostructures are constructed by uniformly modifying caterpillar shaped electrospun BiVO4 nanofibers with controllable quantity of CdS nanoparticles through hydrothermal reaction. The absorption of visible light and separation efficiency of photo-generated charge of BiVO4 are significantly promoted after the decoration of CdS nanoparticles. As a result, the photocatalytic efficiency of the optimized BVO/CdS sample (BVO/CdS-2 stands for the sample synthesized with 0.05 mmol Cd(CH3COO)2 and CH4N2S) is 90.43%, which is 3.3 times as high as that of pure BiVO4 after 180 min irradiation under visible light, respectively. Moreover, the.O2− and.OH are the predominant active species for the degradation process indicated by scavengers added photocatalytic experiments. Due to the simple, low-cost and controllable synthetic process, the BVO/CdS heterojunctions are suitable for practical usage. [ABSTRACT FROM AUTHOR]
ISSN:09574522
DOI:10.1007/s10854-021-06605-y