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Construction of hollow and porous carbon Fiber/CoFe composites derived from strawberry petiole for enhanced microwave absorption

文献类型： 外文期刊

作者： Feng, Jia 1 ; Yang, Lei 1 ; Dong, Hui 1 ; Yang, Li 1 ; Li, Li 1 ; Liu, Yang 2 ;

作者机构： 1.Hebei Acad Agr & Forestry Sci, Shijiazhuang Inst Pomol, Shijiazhuang 050061, Peoples R China

2.Shijiazhuang Tiedao Univ, Hebei Prov Key Lab Electromagnet Environm Effects, Shijiazhuang 050043, Peoples R China

关键词： Microwave absorption; Hollow and porous structure; Carbon-based composites; Synergistic effect; Impedance matching

期刊名称：MATERIALS LETTERS （ 影响因子：3.0； 五年影响因子：2.9 ）

ISSN： 0167-577X

年卷期： 2023 年 348 卷

页码：

收录情况： SCI

摘要： Biomass-derived materials have emerged as lightweight and high-efficiency carbon-based microwave absorber for their huge availability and multifarious microstructure. Herein, we synthesize a strawberry petiole derived carbon fiber (SCF) /magnetic CoFe composites (SCF/CoFe) via solvothermal reaction and calcination treatment. CoFe particles are densely and uniformly distributed on the surface of the uniform hollow and porous SCF. After adjusting the calcination temperature, SCF/CoFe sample with filler content of 15 wt% obtains a minimum reflection loss of -40.4 dB and a wide effective absorption bandwidth of 3.5 GHz at a thin thickness of only 2.0 mm. The hollow and porous structure and synergistic effect between conductive SCF and magnetic CoFe simultaneously contribute to the enhanced impedance matching and attenuation ability, which together result in the remarkable microwave absorption properties.

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