Broadband and Lightweight Microwave Absorber Constructed by in Situ Growth of Hierarchical CoFe2O4/Reduced Graphene Oxide Porous Nanocomposites

被引:229
作者
Liu, Yang [1 ]
Chen, Zhuo [1 ]
Zhang, Yang [1 ]
Feng, Rui [1 ]
Chen, Xiao [1 ]
Xiong, Chuanxi [1 ]
Dong, Lijie [1 ]
机构
[1] Wuhan Univ Technol, State Key Lab Adv Technol Mat Synth & Proc, Ctr Smart Mat & Devices, Wuhan 430070, Hubei, Peoples R China
关键词
CoFe2O4/rGO; hierarchical structure; multiple interfaces; broadband microwave absorption; impedance matching; lightweight absorber; NITROGEN-DOPED GRAPHENE; ABSORPTION PROPERTIES; PERFORMANCE; COMPOSITE; NANOCRYSTALS; FABRICATION; NANOSHEETS; NANOPARTICLES; ENHANCEMENT; ULTRALIGHT;
D O I
10.1021/acsami.8b02137
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
A broadband and lightweight microwave absorber has attracted soaring research interest because of the increasing demand for electronic reliability and defense security. Lightweight ferrites/graphene porous composites with abundant interfaces are potential high-performance absorbers owing to their balanced attenuation ability and impedance matching. Herein, we synthesized hierarchical CoFe2O4/reduced graphene oxide (CFO/rGO) nanocomposites with a porous structure via an in situ solvothermal method. The electromagnetic parameters of CFO/rGO nanocomposites can be well-adjusted by modulating the weight fraction of rGO. The hierarchical porous structure and proper electromagnetic parameters result in the enhancement of impedance matching and attenuation ability. Benefiting from the controllable composition, hierarchical porous structure, and strong synergetic effect between CFO and rGO sheets, as expected, CFO/rGO nanocomposites exhibit superior microwave absorption performance with an ultrabroad bandwidth reaching 5.8 GHz (8.3-14.1 GHz) with a thin thickness of 2.8 mm. Meanwhile, a strong reflection loss of -57.7 dB at the same thickness is achieved. Considering the outstanding microwave absorption performance, the hierarchical CFO/rGO porous nanocomposites can be employed as a high-performance microwave absorber.
引用
收藏
页码:13860 / 13868
页数:9
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