Highly Efficient Photo-Fenton Ag/Fe2O3/BiOI Z-Scheme Heterojunction for the Promoted Degradation of Tetracycline

Novel Ag/Fe2O3/BiOI Z-scheme heterostructures are first fabricated through a facile hydrothermal method. The composition and properties of as-synthesized Ag/Fe2O3/BiOI nanocomposites are characterized by powder X-ray diffraction, scanning electron microscopy, high-resolution transmission electron mi...

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Bibliographic Details
Published in:Nanomaterials (Basel, Switzerland) Switzerland), 2023-07, Vol.13 (13), p.1991
Main Authors: Zheng, Jingjing, Liu, Guoxia, Jiao, Zhengbo
Format: Article
Language:English
Subjects:
BiOI
Catalysts
Charge transfer
Current carriers
Degradation
Efficiency
Ethanol
Fe2O3
Ferric oxide
Heterojunctions
Heterostructures
High resolution electron microscopy
Hydrogen peroxide
Light
Morphology
Nanocomposites
Nanoparticles
Nitrates
Performance degradation
Performance enhancement
photo-Fenton
Photocatalysis
Pollutants
Reagents
Scanning electron microscopy
Silver
Spectrum analysis
Stainless steel
Transmission electron microscopy
Wastewater treatment
X ray powder diffraction
X-ray diffraction
Z-scheme-heterojunction
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Summary:Novel Ag/Fe2O3/BiOI Z-scheme heterostructures are first fabricated through a facile hydrothermal method. The composition and properties of as-synthesized Ag/Fe2O3/BiOI nanocomposites are characterized by powder X-ray diffraction, scanning electron microscopy, high-resolution transmission electron microscopy, UV-Vis diffuse reflectance spectra, etc. The Ag/Fe2O3/BiOI systems exhibit remarkable degradation performance for tetracycline (TC). In particular, the composite (Ag/Fe2O3/BiOI-2) shows the highest efficiency when the contents of Ag and α-Fe2O3 are 2 wt% and 15%, respectively. The effects of operating parameters, including the solution pH, H2O2 concentration, TC concentration, and catalyst concentration, on the degradation efficiency are investigated. The photo-Fenton mechanism is studied, and the results indicated that •O2− is the main active specie for TC degradation. The enhanced performance of Ag/Fe2O3/BiOI heterostructures may be ascribed to the synergic effect between photocatalysis and the Fenton reaction. The formation of Ag/Fe2O3/BiOI heterojunction is beneficial to the transfer and separation of charge carriers. The photo-generated electrons accelerate the Fe2+/Fe3+ cycle and create the reductive reaction of H2O2. This research reveals that the Ag/Fe2O3/BiOI composite possesses great potential in wastewater treatment.
ISSN:2079-4991
2079-4991
DOI:10.3390/nano13131991