Metal organic frameworks-derived Fe-Co nanoporous carbon/graphene composite as a high-performance electromagnetic wave absorber

By Yan Wang, Xiangqi Gao, Che-Yu Lin, Liyuan Shi, Xuanhua Li, Guanglei Wu. Journal of Alloys and Compounds, 2019

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Abstract Based on the EM wave absorption principle, superior absorbers should have the characteristics of strong attenuation constant and suitable impedance matching. In this work, a novel hierarchical composite consisting of Fe-Co nanoparticles embedded in porous carbon decorated with graphene (Fe-Co/NPC/RGO) was synthesized by a simple hydrothermal route using a Co metal organic framework (MOF) followed by calcination process. The microstructure, composition, magnetic properties and microwave absorption performances of as-synthesized samples were characterized and discussed. Compared with Fe-Co/NPC, the Fe-Co/NPC/RGO composite possessed high attenuation constant, excellent impedance matching and synergistic effect, which resulted in significant improvement in its microwave absorption properties. The optimal reflection loss (RL) was −52.9 dB at 10.1 GHz for a thickness of 2.5 mm, and the corresponding absorption bandwidth (RL

Subfields: Aerospace Engineering, Electronic, Optical and Magnetic Materials

View Paper: https://www.semanticscholar.org/paper/37300f5b9aa7a942fe31f71e5600839f837125a8