Magnetic CoFe alloy@C nanocomposites derived from ZnCo-MOF for electromagnetic wave absorption

By Yanqin Wang, Huagao Wang, Jinhong Ye, Liyi Shi, Xin Feng. 2020

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Abstract Magnetic quantum dot (QD)-like CoFe alloy@C nanocomposites derived from ZnCo-MOF using low-dimensional carbon as carriers for electromagnetic wave (EMW) absorption were successfully synthesized by in situ growth and pyrolysis. The resulting CoFe@C nanocomposites were homogeneously conjoined with different carbon supports such as two-dimensional (2D) reduced graphene oxide (rGO) and one-dimensional (1D) carbon nanotubes (CNT). Results indicated EMW absorption properties of CoFe@C were enhanced by introduction of rGO and CNT as carbon hosts for the construction of conductive networks due to the excellent impedance matching and electromagnetic attenuation. The rGO-supported CoFe@C composites annealed at 900 °C (rGO-CoFe@C-900) revealed a minimum reflection loss (RLmin) of −36.08 dB at the sample thickness of 3.0 mm and an effective bandwidth (RL

Subfields: Aerospace Engineering, Electronic, Optical and Magnetic Materials

View Paper: https://www.semanticscholar.org/paper/eb4c2d336deebe6b3f10210fb21a4e3ed5783593