Fabrication of Copper(II)-Coated Magnetic Core-Shell Nanoparticles Fe3O4@SiO2: An Effective and Recoverable Catalyst for Reduction/Degradation of Environmental Pollutants

In this work, we report the synthesis of a magnetically recoverable catalyst through immobilizing copper (II) over the Fe3O4@SiO2 nanoparticles (NPs) surface [Fe3O4@SiO2-L–Cu(II)] (L = pyridine-4-carbaldehyde thiosemicarbazide). Accordingly, synthesized catalysts were determined and characterized by...

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Bibliographic Details
Published in:Crystals (Basel) 2022-06, Vol.12 (6), p.862
Main Authors: Dadashi, Jaber, Khaleghian, Mohammad, Mirtamizdoust, Babak, Hanifehpour, Younes, Joo, Sang Woo
Format: Article
Language:English
Subjects:
Aqueous solutions
Catalysts
Chemical reduction
Chemical synthesis
Copper
copper nanocomplex
Core-shell particles
core/shell structure
Differential thermal analysis
Differential thermogravimetric analysis
dye degradation
Emission analysis
environmental pollutant
Ethanol
Fe3O4 nanoparticles
Field emission microscopy
Fourier transforms
Infrared spectroscopy
International organizations
Iron oxides
Ligands
Magnetic cores
Magnetometers
Methylene blue
Nanoparticles
Nitrophenol
Pollutants
Recovery
Silicon dioxide
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Summary:In this work, we report the synthesis of a magnetically recoverable catalyst through immobilizing copper (II) over the Fe3O4@SiO2 nanoparticles (NPs) surface [Fe3O4@SiO2-L–Cu(II)] (L = pyridine-4-carbaldehyde thiosemicarbazide). Accordingly, synthesized catalysts were determined and characterized by energy dispersive X-ray spectrometry (EDS), X-ray diffraction (XRD), Fourier transforms infrared spectroscopy (FT-IR), vibrating sample magnetometer (VSM), field emission scanning electron microscopy (FESEM), and thermogravimetric-differential thermal analysis (TG-DTA) procedures. The [Fe3O4@SiO2-L–Cu(II)] was used for the reduction of Cr(VI), 4-nitrophenol (4-NP) and organic dyes such as Congo Red (CR) and methylene blue (MB) in aqueous media. Catalytic performance studies showed that the [Fe3O4@SiO2–L–Cu(II)] has excellent activity toward reduction reactions under mild conditions. Remarkable attributes of this method are high efficiency, removal of a homogeneous catalyst, easy recovery from the reaction mixture, and uncomplicated route. The amount of activity in this catalytic system was almost constant after several stages of recovery and reuse. The results show that the catalyst was easily separated and retained 83% of its efficiency after five cycles without considerable loss of activity and stability.
ISSN:2073-4352
2073-4352
DOI:10.3390/cryst12060862