Hierarchical nest-like structure of Co/Fe MOF derived CoFe@C composite as wide-bandwidth microwave absorber

By Lei Wang, Bo Wen, Haibo Yang, Y. Qiu, Nairu He. 2020

178 citations recorded by the source corpus.

Abstract Recently, metal–organic frameworks (MOFs) derived carbonaceous materials have attracted much interest as prospective microwave absorbers due to their porous structure, aperture adjustable, and topological diversity. Herein, a facile strategy was developed to regulate the morphology of CoFe-MOF-74 by adjusting the molar ratio of Co/Fe, and the hierarchical nest-like structure consisted of a large number of CoFe-MOF-74 nanorods was formed as the molar ratio of Co/Fe was 3:1. After pyrolysis at 800 °C in an argon atmosphere, porous CoFe@C nanorod-built hierarchical nest-like structures were obtained, which displayed superior microwave absorption performance with low filler loading of 10 wt%. The maximum reflection loss (RL) was −61.8 dB at 12.7 GHz with a thickness of 2.8 mm, and the corresponding effective absorbing bandwidth (RL

Subfields: Aerospace Engineering, Electronic, Optical and Magnetic Materials

View Paper: https://www.semanticscholar.org/paper/2b9e36d05d3fe31ad42f31fc49315b555729b103