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Construction of oxygen-vacancies-rich S-scheme BaTiO3/red phosphorous heterojunction for enhanced photocatalytic activity.

Authors :
Ma, Yuhua
Aihemaiti, Xiadiye
Qi, Kezhen
Wang, Shiyin
Shi, Yanjie
Wang, Zhuanhu
Gao, Minghe
Gai, Fuhe
Qiu, Yulian
Source :
Journal of Materials Science & Technology; Sep2023, Vol. 156, p217-229, 13p
Publication Year :
2023

Abstract

• The S-scheme BTO/HRP was synthesized to improve the charge separation efficiency and redox ability. • BTO/HRP exhibited excellent photocatalytic performance for RhB degradation and E. coli. inactivation under visible light. • The unique charge transfer mechanism promoted the effective separation and transportation of e <superscript>−</superscript> and h <superscript>+</superscript>. • The oxygen vacancy shifted the fermi energy level upward with consequent effects on the energy band width and light absorbance. The S-scheme heterojunctions can effectively separate photogenerated electrons and holes, retain their high redox capacity, and provide great prospects for enhancing the photocatalytic activity of the composites in different fields. Herein, S-scheme heterojunction photocatalytic materials were rationally designed and prepared by a simple hydrothermal method between narrow-bandgap red phosphorus (HRP) and wide-bandgap BaTiO 3 (BTO) photocatalysts. Owing to the effective charge separation and redox ability from the S-scheme mechanism and oxygen vacancies, BTO/HRP exhibited good photoelectrochemical and photocatalytic degradation ability. Systematic photoreaction tests demonstrated that BTO/HRP had high practicality in the removal of pollutants from wastewater; its photodegradation rate of Rhodamine B reached 3.029 × 10<superscript>−1</superscript> min<superscript>−1</superscript> in 12 min; and it could inactivate 1.8 × 10<superscript>9</superscript> CFU/mL of Escherichia. coli in 1 h, with an antibacterial rate of 99.8%. This paper provided a promising photocatalyst for pollutant removal and a new strategy for the fabrication of efficient RP-based photocatalytic materials. [Display omitted] [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
10050302
Volume :
156
Database :
Supplemental Index
Journal :
Journal of Materials Science & Technology
Publication Type :
Periodical
Accession number :
164300736
Full Text :
https://doi.org/10.1016/j.jmst.2023.03.007