MOFs衍生钴/碳复合材料的制备及吸波性能研究

doi:10.11896/cldb.24020121

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Abstract At present, the problem of electromagnetic pollution is very prominent, and it is of great significance to design high-performance microwave absorption materials. Based on the synergistic effect of dielectric loss, magnetic loss and multi-component in heterogeneous structure, it is a promising strategy to develop microwave absorption materials with strong absorption and multiple scattering. In this work, polyhedral metal organic frameworks (MOFs) were synthesized by a simple method, and Co/C composites were obtained by carbothermal reduction at high tempe-rature. The results indicate that with the increase of calcination temperature, the degree of graphitization of carbon components in Co/C compo-sites is enhanced, and the dielectric loss ability is enhanced. The crystallinity of Co nanoparticles increases, the saturation magnetization of Co nanoparticles increases, and the ferromagnetic properties are obvious. The magnetic-dielectric dual loss mechanism helps to improve impedance matching and enhance loss characteristics. The Co/C composite obtained under the condition of 800 ℃ argon has a minimum reflection loss (R_L) of -46.4 dB at the absorption thickness of 5.0 mm and 4.8 GHz, and a microwave absorption bandwidth (EAB) of 5.6 GHz at the thickness of 2.0 mm.

Key words： Co/C composite electromagnetic wave dielectric loss magnetic loss interfacial polarization

Published: Online: 2025-05-29

CLC number:

TB33

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	Articles by authors
	MA Qian
	QIANG Rong
	SHAO Yulong
	YANG Xiao
	XUE Rui
	REN Fangjie
	WU Xu

Cite this article:

MA Qian,QIANG Rong,SHAO Yulong, et al. Preparation and Absorption Properties of Co/C Composites Derived from MOFs[J]. Materials Reports, 2025, 39(11): 24020121-9.

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https://www.mater-rep.com/EN/10.11896/cldb.24020121 OR https://www.mater-rep.com/EN/Y2025/V39/I11/24020121

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