Magnetic recyclable heterogeneous catalyst Fe3O4/g-C3N4 for tetracycline hydrochloride degradation via photo-Fenton process under visible light

Antibiotic pollution of water resources is a global problem, and the development of new treatments for destroying antibiotics in water is a priority research. We successfully manufactured recyclable magnetic Fe 3 O 4 /g-C 3 N 4 through the electrostatic self-assembly method. Selecting tetracycline (...

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Bibliographic Details
Published in:Environmental technology 2022-09, Vol.43 (21), p.3341-3354
Main Authors: Cui, Kang-Ping, Yang, Ting-Ting, Chen, Yi-Han, Weerasooriya, Rohan, Li, Guang-Hong, Zhou, Kai, Chen, Xing
Format: Article
Language:English
Subjects:
Antibiotics
Carbon nitride
Catalysts
Electrochemistry
Electrons
g-C
Hydrogen peroxide
Iron oxides
magnetic recovery
Magnetic separation
Oxidation
Performance degradation
photo-Fenton system
Pollutants
Raw materials
Self-assembly
Separation
tetracycline
visible-light photocatalysis
Water pollution
Water resources
X ray photoelectron spectroscopy
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Summary:Antibiotic pollution of water resources is a global problem, and the development of new treatments for destroying antibiotics in water is a priority research. We successfully manufactured recyclable magnetic Fe 3 O 4 /g-C 3 N 4 through the electrostatic self-assembly method. Selecting tetracycline (TC) as the target pollutant, using Fe 3 O 4 /g-C 3 N 4 and H 2 O 2 developed a heterogeneous optical Fenton system to remove TC under visible light. Fe 3 O 4 /g-C 3 N 4 was systematically characterized by SEM, TEM, XRD, FTIR, XPS, DRS, and electrochemical methods. The removal efficiency of 7% Fe 3 O 4 /g-C 3 N 4 at pH = 3, H 2 O 2  = 5 mM, and catalyst dosage of 1.0 g/L can reach 99.8%. After magnetic separation, the Fe 3 O 4 /g-C 3 N 4 photocatalyst can be recycled five times with minimal efficiency loss. The excellent degradation performance of the prepared catalyst may be attributed to the proper coupling interface between Fe 3 O 4 and g-C 3 N 4 which promotes the separation and transfer of photogenerated electrons. Photogenerated electrons can also accelerate the conversion of Fe 3+ to Fe 2+ , thereby producing more ˙OH. The new Fe 3 O 4 /g-C 3 N 4 can be used as a raw material for advanced oxidation of water contaminated by refractory antibiotics.
ISSN:0959-3330
1479-487X
DOI:10.1080/09593330.2021.1921052