Optimizing impedance matching by a dual-carbon Co-regulation strategy of Co_(3)O_(4)@rGO/celery stalks derived carbon composites for excellent microwave absorption  

作　　者：Xiubo Xie Yukun Wang Xueqin Sun Heshan Wang Ronghai Yu Wei Du Hongjing Wu 

机构地区：[1]School of Environmental and Material Engineering,Yantai University,Yantai 264005,China [2]MOE Key Laboratory of Material Physics and Chemistry under Extraordinary,School of Physical Science and Technology,Northwestern Polytechnical University,Xi’an 710072,China [3]Key Laboratory of Aerospace Materials and Performance(Ministry of Education),School of Materials Science and Engineering,Beihang University,Beijing 100191,China

出　　处：《Journal of Materials Science & Technology》2023年第2期1-11,共11页材料科学技术（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.52101274);the Natural Science Foundation of Shandong Province(No.ZR2020QE011);the Youth Top Talent Foundation of Yantai University(No.2219008).

摘　　要：Both macroscopic composition and microstructure should be considered for reasonable microwave ab-sorbent designing.In this study,Co_(3)O_(4)@reduced graphene oxide(rGO)/Celery stalks derived carbon(CDC)was prepared by loading Co_(3)O_(4) particles into rGO and biomass-derived carbon mixture through oxidation precipitation.By changing the mass ratio of rGO to CDC,the dielectric and impedance matching proper-ties of the composites can be easily regulated.The RL min value of Co_(3)O_(4)@rGO/CDC_(13) composite(weight ratio for rGO:CDC is 1:3)reaches-84.3 dB with a thickness of 4.6 mm,and the widest effective band-width can be obtained at 4.5 GHz with a matching thickness of 2.8 mm.The Co_(3)O_(4)@rGO/CDC_(13) compos-ite with multiple components(Co_(3)O_(4),CDC,rGO)and 3D net structure produces magnetic/dielectric loss combinations,interfacial polarization,and multiple reflections and scattering,and the CDC with half tube and half sheet structure is conducive to the optimization of impedance matching.The strategy of co-regulating dielectric properties of materials with double carbon provides a novel pathway for the prepa-ration of lightweight,low-cost,and high-performance absorbers.

关 键 词：Microwave absorption GRAPHENE Co_(3)O_(4) Biomass carbon Impedance matching 

分 类 号：TB34[一般工业技术—材料科学与工程]