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Magnetic retrievable Ag/AgBr/ZnFe 2 O 4 photocatalyst for efficient removal of organic pollutant under visible light
Author(s) -
Li Peng,
Liu Yang,
Xue Ruiting,
Fan Ximei
Publication year - 2020
Publication title -
applied organometallic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 71
eISSN - 1099-0739
pISSN - 0268-2605
DOI - 10.1002/aoc.5548
Subject(s) - photocatalysis , photodegradation , x ray photoelectron spectroscopy , methyl orange , nanocomposite , chemistry , photoluminescence , visible spectrum , diffuse reflectance infrared fourier transform , scanning electron microscope , spectroscopy , photochemistry , chemical engineering , materials science , nanotechnology , optoelectronics , organic chemistry , catalysis , composite material , physics , quantum mechanics , engineering
In the present work, a visible‐light‐driven Ag/AgBr/ZnFe 2 O 4 photocatalyst has been successfully synthesized via a deposition–precipitation and photoreduction method. The crystal structure, chemical composition, morphology and optical properties of the as‐prepared nanocomposites were characterized by X‐ray diffraction spectroscopy, X‐ray photoelectron spectroscopy, scanning electron microscopy, high‐resolution transmission electron microscopy, energy‐dispersive X‐ray spectroscope, UV–vis diffuse reflectance spectroscopy and photoluminescence. The photocatalytic activities of the Ag/AgBr/ZnFe 2 O 4 nanocomposites were evaluated through the photodegradation of gaseous toluene and methyl orange (MO) under visible light. The results revealed that the as‐prepared Ag/AgBr/ZnFe 2 O 4 nanocomposite exhibited excellent photocatalytic activity. The degrading efficiency of MO could still reach 90% after four cycles, and the Ag/AgBr/ZnFe 2 O 4 nanocomposite could be recycled easily by a magnet. Additionally, the enhanced photocatalytic mechanism was discussed according to the trapping experiments, which indicated that the photo‐generated holes (h + ) and •O 2 − played important roles in photodegradation process. At last, a possible photocatalytic oxidation pathways of toluene was proposed based on the results of GC–MS. The Ag/AgBr/ZnFe 2 O 4 composites showed potential application for efficient removal of organic pollutant.