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<p>With growing concerns regarding electromagnetic pollution, low-cost, environmentally friendly, and high-performance electromagnetic wave absorption (EWA) materials have attracted significant attention. This paper reports on the synthesis of porous Fe<sub>3</sub>O<sub>4</sub>/C composites that incorporate dielectric and magnetic loss mechanisms via the carbothermal reduction method and optimization of waste ratio to enhance EWA performance. The Fe<sub>3</sub>O<sub>4</sub>/C composites with 10wt% soybean residues (Fe<sub>3</sub>O<sub>4</sub>/C-10), demonstrated the best EWA performance, achieving the minimum reflection loss of −56.4 dB and a bandwidth of 2.14 GHz at a thickness of 2.23 mm. This enhanced EWA performance is primarily attributable to improved impedance matching and the synergistic effect between dielectric and magnetic losses. Furthermore, radar cross-sectional simulations confirmed the practical feasibility of the porous Fe<sub>3</sub>O<sub>4</sub>/C composites. This study proposes a viable strategy for utilizing soybean residue and electrolytic manganese residue, highlighting their potential applications in EWA.</p>

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Facile synthesis of porous Fe3O4/C composites derived from waste residues of soybean and electrolytic manganese for superior electromagnetic wave absorption

  • 期刊论文

  • 发表日期：

    2026年2月3日

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  • Zihao Liu,
  • Kaixiong Xiang,
  • Yujia Nie,
  • Yiting Cheng,
  • Shaohua Jiang,
  • Han Chen,
  • Wei Zhou

摘要

With growing concerns regarding electromagnetic pollution, low-cost, environmentally friendly, and high-performance electromagnetic wave absorption (EWA) materials have attracted significant attention. This paper reports on the synthesis of porous Fe3O4/C composites that incorporate dielectric and magnetic loss mechanisms via the carbothermal reduction method and optimization of waste ratio to enhance EWA performance. The Fe3O4/C composites with 10wt% soybean residues (Fe3O4/C-10), demonstrated the best EWA performance, achieving the minimum reflection loss of −56.4 dB and a bandwidth of 2.14 GHz at a thickness of 2.23 mm. This enhanced EWA performance is primarily attributable to improved impedance matching and the synergistic effect between dielectric and magnetic losses. Furthermore, radar cross-sectional simulations confirmed the practical feasibility of the porous Fe3O4/C composites. This study proposes a viable strategy for utilizing soybean residue and electrolytic manganese residue, highlighting their potential applications in EWA.