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Date of Publication:2022-10-06

Journal:Cailiao Yanjiu Xuebao/Chinese Journal of Materials Research

Volume:34

Issue:9

Page Number:641-649

ISSN No.:1005-3093

Abstract:An economic and green approach for the controllable synthesis of porous functionalized graphene materials as microwave absorbers was proposed in this paper. POROUS RGO@Ni nanocomposites were synthesized by a simple one-pot method based on solvothermal treatment of Ni(acac)2 and graphene oxide without adding additional reducing agents. The structure and morphology of the as-prepared hybrid materials were characterized by XRD, Raman spectroscopy, XPS, VSM, SEM and TEM. The results show that uniform Ni spheres of about 900 nm in diameter homogeneously distributed on graphene sheets and form a porous structure. The electromagnetic data demonstrated that RGO@Ni nanocomposites exhibited significantly excellent electromagnetic wave (EMW) absorption properties, probably originating from the unique 3D porous structure and synergistic effect. The minimum reflection loss (RLmin) and maximum effective absorption bandwidth (EAB) of RGO@Ni nanocomposites are -61.2 dB and 6.6 GHz, respectively.

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