Novel BP/BiOBr S-scheme nano-heterojunction for enhanced visible-light photocatalytic tetracycline removal and oxygen evolution activity

Xibao Li; Jie Xiong; Xiaoming Gao; Jun Ma; Zhi Chen; Bangbang Kang; Jiyou Liu; Hai Li; Zhijun Feng; Juntong Huang

doi:10.1016/j.jhazmat.2019.121690

Novel BP/BiOBr S-scheme nano-heterojunction for enhanced visible-light photocatalytic tetracycline removal and oxygen evolution activity

J Hazard Mater. 2020 Apr 5:387:121690. doi: 10.1016/j.jhazmat.2019.121690. Epub 2019 Nov 15.

Authors

Xibao Li¹, Jie Xiong², Xiaoming Gao³, Jun Ma⁴, Zhi Chen², Bangbang Kang², Jiyou Liu², Hai Li², Zhijun Feng², Juntong Huang⁵

Affiliations

¹ School of Materials Science and Engineering, Nanchang Hangkong University, Nanchang, 330063, China. Electronic address: lixibao@nchu.edu.cn.
² School of Materials Science and Engineering, Nanchang Hangkong University, Nanchang, 330063, China.
³ Department of Chemistry and Chemical Engineering, Shaanxi Key Laboratory of Chemical Reaction Engineering, Yan'an University, Yan'an, 716000, China.
⁴ College of Chemistry and Materials Science, Sichuan Normal University, Chengdu, 610068, China.
⁵ School of Materials Science and Engineering, Nanchang Hangkong University, Nanchang, 330063, China. Electronic address: huangjt@nchu.edu.cn.

PMID: 31889599
DOI: 10.1016/j.jhazmat.2019.121690

Abstract

Designing heterojunction photocatalysts with strong interfacial interaction and matched band structure is an effective way to reduce the recombination of photogenerated carriers. Herein, the exfoliated black phosphorus (BP) nanosheets were coupled with BiOBr nanosheets having higher Fermi level, and thereby it constructed a novel layered BP/BiOBr nano-heterojunction with chemically bonding, larger contact interface and unique band structures. BiOBr nanosheets were self-assembled on the surface of BP nanosheets by a facile liquid-phase ultrasound combined with solvothermal method. The photocatalytic performance for tetracycline (TC) degradation, oxygen evolution and H₂O₂ production rate of Sol-10BP/BiOBr was 7.8, 7.0 and 2.6 times than that of pure BiOBr, respectively. The in-situ generated H₂O₂ and OH became the main active species of mineralization and decomposition of TC. The novel S-scheme two-dimensional BP/BiOBr nano-heterojunction for boosting spatial charge separation retained the useful holes-electrons with higher redox ability, which was very beneficial for producing more OH, H₂O₂ and O₂, and the photocatalytic activity was greatly improved.

Keywords: BiOBr; H(2)O(2); Oxygen evolution; Photocatalysis; S-scheme.

Publication types

Research Support, Non-U.S. Gov't