Hierarchical Co/CoO/FeO/C nanocomplex derived from Co(OH)@NH-MIL-88 to aid highly efficient microwave absorption

Design of microwave absorbents with hierarchical interfacial structures has become an effective method to scatter microwaves. Metal/carbon composites derived from metal-organic frameworks (MOFs) have attracted considerable attention due to their tunable chemical composition and microstructure. We de...

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Bibliographic Details
Published in:New journal of chemistry 2022-10, Vol.46 (4), p.19161-19167
Main Authors: Miao, Peng, Chen, Weixing, Li, Kailei, Zhao, Weifeng, Kong, Jie
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Summary:Design of microwave absorbents with hierarchical interfacial structures has become an effective method to scatter microwaves. Metal/carbon composites derived from metal-organic frameworks (MOFs) have attracted considerable attention due to their tunable chemical composition and microstructure. We describe the facile synthesis of a Co/CoO/FeO/C nanocomplex employing Co(OH) 2 on NH 2 -MIL-88B as the "sacrificial template" through one-step pyrolysis. The as-prepared flaky-like Co/CoO/FeO/C nanocomplex showed an effective absorption width of 4.7 GHz at 1.86 mm and a minimum reflection loss of −45.5 dB at 2.01 mm. Our study can aid design of a microstructural strategy for preparing high-performance microwave absorbents. Facile preparation of a flake-like Co/CoO/FeO/C nanocomplex employing Co(OH) 2 on NH 2 -MIL-88B through one-step pyrolysis. The nanocomplex can efficiently scatter microwaves.
ISSN:1144-0546
1369-9261
DOI:10.1039/d2nj04411k