Graphene@Ni0.5Co0.5Fe2O4 hybrid framework with enhanced interfacial polarization for electromagnetic wave absorption

Wahaab, F.A. and Yahya, W. and Adebayo, L.L. and Kazeem, I. and Abdulraheem, A. and Alqasem, B. and Yusuf, J.Y. and Adekoya, A.A. and Mui Nyuk, C. (2021) Graphene@Ni0.5Co0.5Fe2O4 hybrid framework with enhanced interfacial polarization for electromagnetic wave absorption. Journal of Alloys and Compounds, 854 .

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Fabrication of smart materials for electromagnetic (EM) wave absorption has been propounded as efficient EM interference and pollution mitigation method. Herein, a porous lightweight graphene@Ni0.5Co0.5Fe2O4 composite was prepared via a coprecipitation method. The results show that Ni0.5Co0.5Fe2O4 nanoparticles are homogeneously dispersed and anchored on the graphene flakes. Investigation of the EM waves absorption properties of the material at different filling in paraffin reveals that at 15 wt loading, the composite absorbs large percent of the EM waves at minimal thickness. The composite attains optimum reflection loss peak �44.7 dB at 17.45 GHz, with 1.5 mm thickness. This enhanced EM wave absorption performance (at lesser thickness than Ni0.5Co0.5Fe2O4 in literature) could be ascribed to interfacial polarization and a good impedance match arising from unique pore configuration of the dielectric (graphene) and magnetic (Ni0.5Co0.5Fe2O4) composite. These results indicate that the lightweight G@Ni0.5Co0.5Fe2O4 composites with strong absorption at reduced thickness is an efficient absorber for high-frequency EM wave attenuation. © 2020 Elsevier B.V.

Item Type:Article
Impact Factor:cited By 6
Uncontrolled Keywords:Electromagnetic wave absorption; Electromagnetic waves; Graphene; Impedance matching (electric); Iron compounds; Nickel compounds, Absorption property; Coprecipitation method; Efficient absorbers; Good impedance match; Interfacial polarization; Pollution mitigation; Pore configuration; Strong absorptions, Electromagnetic wave polarization
ID Code:23825
Deposited By: Ms Sharifah Fahimah Saiyed Yeop
Deposited On:19 Aug 2021 13:09
Last Modified:19 Aug 2021 13:09

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