J. Mater. Sci. Technol. ›› 2023, Vol. 158: 207-217.DOI: 10.1016/j.jmst.2023.01.051

• Research article • Previous Articles     Next Articles

Carbon nanotubes decorated FeNi/nitrogen-doped carbon composites for lightweight and broadband electromagnetic wave absorption

Juhua Luoa,b,*, Wenxing Yana, Xiaopeng Lia, Pengcheng Shua, Jie Meia, Yafan Shia   

  1. aSchool of Materials Science and Engineering, Yancheng Institute of Technology, Yancheng 224051, China;
    bJiangsu Provincial Key Laboratory of Eco-Environmental Materials, Yancheng Institute of Technology, Yancheng 224051, China
  • Received:2022-12-22 Revised:2023-01-20 Accepted:2023-01-20 Published:2023-09-20 Online:2023-09-15
  • Contact: *E-mail address:ljh@ycit.edu.cn (J. Luo)

Abstract: Magnetic-dielectric component modulation and heterogeneous interface engineering were considered as an effective strategy for designing lightweight and broadband electromagnetic wave (EMW) absorbors. Herein, a series of carbon nanotubes (CNTs) decorated core-shell nitrogen-doped carbon (CNTs/FeNi/NC) composites were successfully fabricated via the carbonization of CNTs/NiFe2O4/PDA precursors obtained by hydrothermal and polymerization method. The EMW absorption (EMWA) properties of CNTs/FeNi/NC composites were explored by varying the CNTs content. When the CNTs content was 15%, the minimum reflection loss (RLmin) value was -51.13 dB at 9.52 GHz and the corresponding effective absorption bandwidth (EAB) value was 2.96 GHz (8.96-11.12 GHz) at 2.5 mm. Particularly, the maximum EAB value can reach up to 4.64 GHz (12.80-17.44 GHz) at 1.7 mm. The excellent EMW attenuation capability resulted from the enhanced conductive loss, polarization loss, magnetic loss, and improved impedance matching. This work offers a novel reference for designing lightweight and broadband EMWA materials.

Key words: Carbon nanotubes, Nano-heterogeneous interface engineering, Electromagnetic wave absorption, Impedance matching