J. Mater. Sci. Technol. ›› 2024, Vol. 185: 165-173.DOI: 10.1016/j.jmst.2023.11.010

• Research article • Previous Articles     Next Articles

Controllable heterogeneous interfaces and dielectric modulation of biomass-derived nanosheet metal-sulfide complexes for high-performance electromagnetic wave absorption

Zehua Zhoua,c,1, Di Lanb,1, Junwen Rend, Yuhang Chenga, Zirui Jiac,*, Guanglei Wuc, Pengfei Yina,*   

  1. aCollege of Science, Sichuan Agricultural University, Ya’an 625014, China;
    bSchool of Materials Science and Engineering, Hubei University of Automotive Technology, Shiyan 442002, China;
    cInstitute of Materials for Energy and Environment, State Key Laboratory of Bio-fibers and Eco-textiles, College of Materials Science and Engineering, Qingdao University, Qingdao 266071, China;
    dCollege of Electrical Engineering, Sichuan University, Chengdu 610065, China
  • Received:2023-11-08 Revised:2023-11-25 Accepted:2023-11-26 Online:2023-12-16
  • Contact: *E-mail addresses: jiazirui@qdu.edu.cn (Z. Jia), wuguanglei@mail.xjtu.edu.cn , wguanglei@qdu.edu.cn (G. Wu), yinpengfei@sicau.edu.cn (P. Yin).
  • About author:1These authors contributed equally to this work.

Abstract: Constructing new environmentally friendly dielectric coupling models is an effective strategy for designing high-performance wave absorbers. However, biomass carbon materials with high potential energy and a lack of magnetic response mechanism do not fulfill the requirements. In this work, the effects of different pyrolysis temperatures and the introduction of different metal sulfides on the microscopic morphology and dielectric-magnetic properties of the composites were investigated. Among them, K element detected in the biomass effectively modulates the conduction loss. The minimum reflection loss (RLmin) of -62.42 dB at 1.8 mm and the maximum effective absorption bandwidth (EABmax) of -62.42 dB at 1.9 mm were obtained due to the non-uniform interfacial-induced polarization of the metal-sulfide nanosheets and the scattering of the electromagnetic waves (EW) by the “island” microstructures. This study provides a powerful reference for the modification and application of biomass materials.

Key words: Biomass materials, Metal sulfide, Electromagnetic wave absorption, Oxygen vacancy Interfacial polarization