In suit constructing S-scheme FeOOH/MgIn2S4 heterojunction with boosted interfacial charge separation and redox activity for efficiently eliminating antibiotic pollutant

Jin Luo; Pingping Lin; Pilang Zheng; Xunfu Zhou; Xiaomei Ning; Liang Zhan; Zhijun Wu; Xiangning Liu; Xiaosong Zhou

doi:10.1016/j.chemosphere.2022.134297

In suit constructing S-scheme FeOOH/MgIn₂S₄ heterojunction with boosted interfacial charge separation and redox activity for efficiently eliminating antibiotic pollutant

Chemosphere. 2022 Jul:298:134297. doi: 10.1016/j.chemosphere.2022.134297. Epub 2022 Mar 10.

Authors

Jin Luo¹, Pingping Lin¹, Pilang Zheng¹, Xunfu Zhou¹, Xiaomei Ning¹, Liang Zhan¹, Zhijun Wu¹, Xiangning Liu², Xiaosong Zhou³

Affiliations

¹ School of Chemistry and Chemical Engineering, Innovation team of Photocatalytic Technology, Key Laboratory of Clean Energy Materials Chemistry of Guangdong Higher Education Institutes, Lingnan Normal University, Zhanjiang, 524048, China.
² Clinical Research Platform for Interdiscipline of Stomatology, The First Affiliated Hospital of Jinan University & Department of Stomatology, College of Stomatology, Jinan University, Guangdong, 510632, China.
³ School of Chemistry and Chemical Engineering, Innovation team of Photocatalytic Technology, Key Laboratory of Clean Energy Materials Chemistry of Guangdong Higher Education Institutes, Lingnan Normal University, Zhanjiang, 524048, China. Electronic address: zhouxs@lingnan.edu.cn.

PMID: 35283143
DOI: 10.1016/j.chemosphere.2022.134297

Abstract

Photocatalytic elimination of antibiotic pollutant is an appealing avenue in response to the water contamination, but it still suffers from sluggish charge detachment, limited redox capacity as well as poor visible light utilization. Herein, a particular S-scheme FeOOH/MgIn₂S₄ heterojunction with wide visible light absorption was triumphantly constructed by in-situ growth of MgIn₂S₄ nanoparticles onto the surface of FeOOH nanorods, and employed as a high-efficiency visible light driven photocatalyst for removing tetracycline (TC). Conspicuously, the as-obtained FeOOH(15 wt%)/MgIn₂S₄ elucidated the optimal TC removal rate of 0.01258 min^-1 after 100 min of visible light illumination, which was almost 33.1 and 6.6 times larger than those of neat FeOOH and MgIn₂S₄, separately. The exceptional degradation performance was principally put down to the establishment of S-scheme heterojunction between FeOOH and MgIn₂S₄, which could not merely accelerate the detachment of photogenerated carriers, but also retain the powerful reducing ability of photoinduced electrons for MgIn₂S₄ and high oxidizing capacity of photoexcited holes for FeOOH, strongly driving the generation of plentiful active species including holes, superoxide and hydroxyl radicals. Additionally, the possible degradation mechanism and pathways of TC were also speculated. This work offers a valuable perspective for constructing high-efficiency S-scheme heterojunction photocatalysts for eradicating antibiotics.

Keywords: Antibiotic removal; Enhanced charge separation; Photocatalysis; S-scheme heterojunction; Water remediation.

MeSH terms

Anti-Bacterial Agents*
Catalysis
Environmental Pollutants*
Oxidation-Reduction
Tetracycline

Substances

Anti-Bacterial Agents
Environmental Pollutants
Tetracycline