Fabrication of ternary AgBr/BiPO4/g-C3N4 heterostructure with dual Z-scheme and its visible light photocatalytic activity for Reactive Blue 19

Yuzhen Li; Zhen Li; Yunsheng Xia; Houfen Li; Jianhui Shi; Aiming Zhang; Haohao Huo; Siyang Tan; Lizhen Gao

doi:10.1016/j.envres.2020.110260

Fabrication of ternary AgBr/BiPO₄/g-C₃N₄ heterostructure with dual Z-scheme and its visible light photocatalytic activity for Reactive Blue 19

Environ Res. 2021 Jan:192:110260. doi: 10.1016/j.envres.2020.110260. Epub 2020 Oct 15.

Authors

Yuzhen Li¹, Zhen Li², Yunsheng Xia³, Houfen Li², Jianhui Shi², Aiming Zhang⁴, Haohao Huo², Siyang Tan², Lizhen Gao⁵

Affiliations

¹ College of Environmental Science and Engineering, Taiyuan University of Technology, 79 Yingze Street Wanbailin District, Taiyuan, 030024, China; China Institute for Radiation Protection, 102 Xuefu Street Xiaodian District, Taiyuan, 030006, China. Electronic address: liyuzhen@tyut.edu.cn.
² College of Environmental Science and Engineering, Taiyuan University of Technology, 79 Yingze Street Wanbailin District, Taiyuan, 030024, China.
³ Department of Chemistry, Bohai University, Jinzhou, 121013, China.
⁴ China Institute for Radiation Protection, 102 Xuefu Street Xiaodian District, Taiyuan, 030006, China.
⁵ College of Environmental Science and Engineering, Taiyuan University of Technology, 79 Yingze Street Wanbailin District, Taiyuan, 030024, China; School of Mechanical Engineering, University of Western Australia, 35 Stirling Highway, WA, 6009, Australia.

PMID: 33069700
DOI: 10.1016/j.envres.2020.110260

Abstract

A plasmonic photocatalyst of AgBr/BiPO₄/g-C₃N₄ was prepared. X-ray powder diffraction, Scanning electron microscope, Transmission electron microscopy, Fourier infrared spectroscopy, Ultraviolet Visible diffuse reflectance spectroscopy and photoluminescence emission spectra have been employed to determine the structure, morphology and optical property of the as-prepared AgBr/BiPO₄/g-C₃N₄ composite and analysis the reasons for improving photocatalytic efficiency. The optimal doping ratio of AgBr was 10 wt% by degrading 20 mg/L of Reactive Blue 19 (RB19) under visible light (λ > 420 nm), and 10 wt%AgBr/BiPO₄/g-C₃N₄ degraded 20 mg/L of RB19 to 2.59% at 40 min, which is ascribed to synergistic effects at the interface of AgBr, BiPO₄ and g-C₃N₄. The effect of catalyst dosage, initial concentration and initial pH of RB19 solution on photocatalytic efficiency was investigated. Four cycles of experiments were conducted. Finally, through the trapping experiment, we found that the main active factor for degrading RB19 in the photocatalytic process is O₂^-. The possible photocatalytic mechanism of AgBr/BiPO₄/g-C₃N₄ was discussed in connection with the synergistic effect of Ag and active substances at the AgBr/BiPO₄/g-C₃N₄ interface.

Keywords: AgBr/BiPO(4)/g-C(3)N(4); Photocatalysis; Photocatalytic mechanism; Visible light; g-C(3)N(4).

Publication types

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

MeSH terms

Anthraquinones
Catalysis
Graphite*
Light

Substances

Anthraquinones
Graphite
Remazol Brilliant Blue R