Enhancing visible-light photocatalytic degradation of tetracycline by ZnFe2O4 loaded on UiO-66-NH2 under activated persulfate

Inspired by the wide applications of spinel oxide and metal–organic framework-modified narrow band gap materials, we herein report ZnFe 2 O 4 /UiO-66-NH 2 nanocomposites synthesized by a two-step hydrothermal method in this study. Their structure, morphology and composition were characterized throug...

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Bibliographic Details
Published in:Research on chemical intermediates 2021-08, Vol.47 (8), p.3313-3328
Main Authors: Wu, Wei, Feng, Sheng, Zheng, Wei, Shao, Cong, Jiang, Zhenfei
Format: Article
Language:English
Subjects:
Antibiotics
Catalysis
Catalytic activity
Chemistry
Chemistry and Materials Science
Composite materials
Contaminants
Electromagnetic absorption
Fluorescence
Heterojunctions
Hydroxyl radicals
Inorganic Chemistry
Metal-organic frameworks
Morphology
Nanocomposites
Photocatalysis
Photodegradation
Physical Chemistry
X ray photoelectron spectroscopy
Zinc ferrites
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Summary:Inspired by the wide applications of spinel oxide and metal–organic framework-modified narrow band gap materials, we herein report ZnFe 2 O 4 /UiO-66-NH 2 nanocomposites synthesized by a two-step hydrothermal method in this study. Their structure, morphology and composition were characterized through XRD, FTIR, SEM, TEM and XPS. UV–Vis DRS and fluorescence spectroscopy were used to explore the photochemical properties of ZnFe 2 O 4 /UiO-66-NH 2 . Among all composite materials with different ratios, ZnFe 2 O 4 /10%UiO-66-NH 2 exhibited the best photocatalytic degradation efficiency in the presence of persulfate. The efficiency of degradation of the environmental contaminant antibiotic tetracycline was increased about 2 times. The improved photocatalytic activity of the composite material could be attributed to its wide light absorption range and the Z-type heterojunction scheme suppressed the recombination of photogenerated electron–hole pairs. A trapping experiment indicated that sulfate ions, hydroxyl radicals and holes were the main active species in the photocatalytic reaction system. When ZnFe 2 O 4 reacted with persulfate, numerous Fe 2+ were converted into Fe 3+ , and the cyclic reaction could activate persulfate to a greater extent. In addition, the material also showed high recycling performance. These results demonstrate ZnFe 2 O 4 /UiO-66-NH 2 nanocomposites are expected to generate a promising photocatalyst for degradation of environmental antibiotics.
ISSN:0922-6168
1568-5675
DOI:10.1007/s11164-021-04434-6