J. Mater. Sci. Technol. ›› 2024, Vol. 195: 126-135.DOI: 10.1016/j.jmst.2024.02.031

• Research Article • Previous Articles     Next Articles

Hierarchically three-dimensional ZrO2/Fe3O4/C nanocomposites with Janus structure for high-efficiency electromagnetic wave absorption

Ying Xue, Xianyuan Liu, Xianyong Lu*   

  1. Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry, Beihang University, Beijing 100191, China
  • Received:2024-01-31 Revised:2024-02-23 Accepted:2024-02-26 Published:2024-10-01 Online:2024-03-24
  • Contact: *E-mail address: xylu@buaa.edu.cn (X. Lu)

Abstract: Hierarchically three-dimensional (3D) materials present a pivotal challenge and opportunity in achieving effective microwave absorption with synergistic effects. In this work, α-Fe2O3@ZrO2 with core-shell structure were fabricated in-situ on aramid nanofibers by a solvothermal method. Following calcination, 3D ZrO2/Fe3O4/ C nanocomposites with Janus structure have been successfully synthesized. By controlling the lattice match and mismatch in both processes, a core-shell structure of α-Fe2O3@ZrO2 and Janus structure of ZrO2/Fe3O4 have been well-define performed. The composite material ZrO2/Fe3O4/C-700 has a minimum reflection loss (RLmin) of -67.4 dB at a thickness of 2.0 mm. The effective absorption bandwidth (EAB) at a thickness of 2.4 mm is 6.0 GHz (11.0-17.0 GHz). This study provides a novel strategy for fabricating high-efficiency electromagnetic wave absorption materials with dual synergistic effects in nanosized scale.

Key words: Electromagnetic wave absorption, Core-shell structure, Janus structure, Lattice mismatch, Dual synergistic effects