(Cu/Ni)–Al layered double hydroxides@Fe3O4 as efficient magnetic nanocomposite photocatalyst for visible-light degradation of methylene blue

A new magnetic nanocomposite based on layered double hydroxides (LDHs) was synthesized by coprecipitation of (Cu/Ni)–Al LDHs and nano-Fe 3 O 4 and characterized by Fourier-transform infrared (FT-IR) spectroscopy, X-ray diffraction (XRD) analysis, scanning electron microscopy (SEM), and energy-disper...

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Bibliographic Details
Published in:Research on chemical intermediates 2017-10, Vol.43 (10), p.5795-5810
Main Author: Mardani, Hamid Reza
Format: Article
Language:English
Subjects:
Aluminum
Anions
Catalysis
Chemistry
Chemistry and Materials Science
Copper
Degradation
Fourier transforms
Hydroxides
Infrared analysis
Inorganic Chemistry
Iron oxides
Light irradiation
Methylene blue
Nanocomposites
Nickel
Oxidation
Photocatalysts
Photodegradation
Physical Chemistry
Scanning electron microscopy
X-ray diffraction
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Summary:A new magnetic nanocomposite based on layered double hydroxides (LDHs) was synthesized by coprecipitation of (Cu/Ni)–Al LDHs and nano-Fe 3 O 4 and characterized by Fourier-transform infrared (FT-IR) spectroscopy, X-ray diffraction (XRD) analysis, scanning electron microscopy (SEM), and energy-dispersive X-ray (EDX) techniques. The size of the composite was about 10 nm. Photodegradation of methylene blue as an organic pollutant by this nanocomposite via oxidation under visible-light irradiation was studied in comparison with nano-Fe 3 O 4 and (Cu/Ni)–Al LDHs. The results showed that the degradation by the nanocomposite was more effective compared with Fe 3 O 4 or (Cu/Ni)–Al LDHs alone. After four runs of use as photocatalyst, the composite remained powerful and effective in the degradation reaction. The influence of acidic, neutral, and basic pH and chloride anion on photodegradation of methylene blue was also investigated. The degradation occurred for a long time in acidic and basic pH but was faster in presence of Cl − anion. Graphical Abstract
ISSN:0922-6168
1568-5675
DOI:10.1007/s11164-017-2963-y