Synthesis of hierarchical core-shell NiFe2O4@MnO2 composite microspheres decorated graphene nanosheet for enhanced microwave absorption performance

A ternary functional composite NiFe2O4@MnO2@graphene was synthesized successfully via a facile method. The phase constitution, microstructures, morphologies and chemical compositions of the samples were investigated by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), tra...

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Bibliographic Details
Published in:Ceramics international 2017-10, Vol.43 (14), p.11367-11375
Main Authors: Wang, Yan, Fu, Yuqiao, Wu, Xinming, Zhang, Wenzhi, Wang, Qiguan, Li, Jinhua
Format: Article
Language:English
Subjects:
Graphene
Hierarchical structure
Microwave absorption properties
NiFe2O4
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Summary:A ternary functional composite NiFe2O4@MnO2@graphene was synthesized successfully via a facile method. The phase constitution, microstructures, morphologies and chemical compositions of the samples were investigated by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), Brunauer-Emmett-Teller (BET) and X-ray photoelectron spectroscopy (XPS). It was observed that the NiFe2O4 nanoparticles were coated by hierarchically MnO2 shells and distributed on the surface of graphene. Investigations of EM wave absorption indicated that NiFe2O4@MnO2@ graphene composite has the strongest reflection loss of −47.4dB at 7.4GHz at the matching thickness of 3mm, compared to NiFe2O4 and NiFe2O4@MnO2, and its maximum absorption bandwidth (
ISSN:0272-8842
1873-3956
DOI:10.1016/j.ceramint.2017.05.344