The first ternary Nd-MOF/GO/Fe3O4 nanocomposite exhibiting an excellent photocatalytic performance for dye degradation

Herein, a ternary nanocomposite photocatalyst (MOF-1/GO/Fe3O4) based on a novel Nd-MOF, graphene oxide (GO), and Fe3O4 was successfully prepared. It was verified that the MOF nanoparticles and GO sheets were integrated by means of intimate interfacial contacts and a large number of Fe3O4 microsphere...

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Published in:Dalton transactions : an international journal of inorganic chemistry 2020-08, Vol.49 (31), p.10745-10754
Main Authors: Bai, Yuting, Zhang, Shuo, Feng, Sisi, Zhu, Miaoli, Ma, Shengqian
Format: Article
Language:English
Subjects:
Aqueous solutions
Crystallography
Dyes
Graphene
Iron oxides
Methylene blue
Microspheres
Nanocomposites
Nanoparticles
Optical properties
Performance degradation
Photocatalysis
Photocatalysts
Photodegradation
Wastewater treatment
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Summary:Herein, a ternary nanocomposite photocatalyst (MOF-1/GO/Fe3O4) based on a novel Nd-MOF, graphene oxide (GO), and Fe3O4 was successfully prepared. It was verified that the MOF nanoparticles and GO sheets were integrated by means of intimate interfacial contacts and a large number of Fe3O4 microspheres were uniformly loaded on the surface of GO. The ternary nanocomposite was a stable, environmentally friendly, and efficient visible-light photocatalyst, which displayed excellent photocatalytic performance in the degradation of methylene blue (MB) (∼95%) dye within 80 min under sunlight irradiation in the aqueous solution. Compared to MOF-1, the photocatalytic efficiency of the composite was improved by 90% and the excitation wavelength was moved from the ultraviolet to visible region. The enhancement of photocatalytic performance can be ascribed to the introduction of GO, which efficiently accelerated electron migration, minimized the recombination of photogenerated electron–hole pairs, and improved the optical absorption properties, leading to a synergistic facilitation of the photocatalysis process. The ternary composite demonstrated excellent stability and reusability and can be easily recovered by a magnetic field. The study would provide novel avenues for the preparation of highly efficient and environmentally stable photocatalysts for organic wastewater treatment.
ISSN:1477-9226
1477-9234
DOI:10.1039/d0dt01648a