Fe3O4 quantum dots mediated P-g-C3N4/BiOI as an efficient and recyclable Z-scheme photo-Fenton catalyst for tetracycline degradation and bacterial inactivation

Xufei Li; Xiaolin Shen; Yanling Qiu; Zhiliang Zhu; Hua Zhang; Daqiang Yin

doi:10.1016/j.jhazmat.2023.131677

Fe₃O₄ quantum dots mediated P-g-C₃N₄/BiOI as an efficient and recyclable Z-scheme photo-Fenton catalyst for tetracycline degradation and bacterial inactivation

J Hazard Mater. 2023 Aug 15:456:131677. doi: 10.1016/j.jhazmat.2023.131677. Epub 2023 May 26.

Authors

Xufei Li¹, Xiaolin Shen², Yanling Qiu³, Zhiliang Zhu⁴, Hua Zhang⁵, Daqiang Yin¹

Affiliations

¹ Key Laboratory of Yangtze River Water Environment, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, China.
² Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, China; State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China.
³ Key Laboratory of Yangtze River Water Environment, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, China. Electronic address: ylqiu@tongji.edu.cn.
⁴ Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, China; State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China. Electronic address: zzl@tongji.edu.cn.
⁵ State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China.

PMID: 37245363
DOI: 10.1016/j.jhazmat.2023.131677

Abstract

Photo-Fenton technology integrated by photocatalysis and Fenton reaction is a favorable strategy for water remediation. Nevertheless, the development of visible-light-assisted efficient and recyclable photo-Fenton catalysts still faces challenges. This study successfully constructed a novel separable Z-scheme P-g-C₃N₄/Fe₃O₄QDs/BiOI (PCN/FOQDs/BOI) heterojunction via in-situ deposition method. The results showed that the photo-Fenton degradation efficiency for tetracycline over optimal ternary catalyst reached 96.5% within 40 min at visible illumination, which was 7.1 and 9.6 times higher than its single photocatalysis and Fenton system, respectively. Moreover, PCN/FOQDs/BOI possessed excellent photo-Fenton antibacterial activity, which could completely inactivate 10⁸ CFU·mL^-1 of E. coli and S. aureus within 20 and 40 min, respectively. Theoretical calculation and in-situ characterization revealed that the enhanced catalysis behavior resulted from the FOQDs mediated Z-scheme electronic system, which not only facilitated photocreated carrier separation of PCN and BOI while maintaining maximum redox capacity, but also accelerated H₂O₂ activation and Fe³⁺/Fe²⁺ cycle, thus synergistically forming more active species in system. Additionally, PCN/FOQDs/BOI/Vis/H₂O₂ system displayed extensive adaptability at pH range of 3-11, removal universality for various organic pollutants and attractive magnetic separation property. This work would provide an inspiration for design of efficient and multifunctional Z-scheme photo-Fenton catalyst in water purification.

Keywords: Degradation; Inactivation; P-g-C(3)N(4)/Fe(3)O(4)QDs/BiOI; Photo-Fenton; Z-scheme heterojunction.

Publication types

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

MeSH terms

Anti-Bacterial Agents / pharmacology
Catalysis
Escherichia coli*
Hydrogen Peroxide
Quantum Dots*
Staphylococcus aureus
Tetracycline

Substances

Hydrogen Peroxide
Tetracycline
Anti-Bacterial Agents