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<p>Three-dimensional (3D) graphene foam has drawn more and more attention due to its unique structural features such as porous, large specific surface area and tunable electromagnetic characteristics, thus becomes preferred candidates in the field of microwave absorption (MA) materials. In this study, the 3D reduced graphene oxide (rGO) loaded with magnetic α-Fe<sub>2</sub>O<sub>3</sub> nanocrystals were synthesised by one-step solvothermal method using ethanol (EA) as auxiliary solvent (3D-EA-rGO@Fe<sub>2</sub>O<sub>3</sub>). The electromagnetic parameters can be tailored by changing Fe₂O₃ content. The 3D-EA-rGO@Fe<sub>2</sub>O<sub>3</sub> foam exhibits outstanding MA properties, reaching a minimum reflection loss (RL<sub>min</sub>) of -71.05&#xa0;dB at 10.8&#xa0;GHz with a thickness of 2.45&#xa0;mm, and an effective absorption bandwidth (RL ≤ -10&#xa0;dB) of 5.87&#xa0;GHz (11.03–16.90&#xa0;GHz). Furthermore, the 3D-EA-rGO@Fe<sub>2</sub>O<sub>3</sub> exhibits excellent RCS reduction and remarkable lightweight, which has great application potential to meet the increasingly demands for practical applications of microwave absorption materials.</p>

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Synthesis of three-dimensional reduced graphene oxide@Fe2O3 for high efficient microwave absorption

  • 期刊论文

  • 发表日期：

    2025年7月14日

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  • Qi Yu,
  • Chenglong Du,
  • Yiyi Wang,
  • Yunlong Wang,
  • Daming Zheng,
  • Zhengqian Zhang

摘要

Three-dimensional (3D) graphene foam has drawn more and more attention due to its unique structural features such as porous, large specific surface area and tunable electromagnetic characteristics, thus becomes preferred candidates in the field of microwave absorption (MA) materials. In this study, the 3D reduced graphene oxide (rGO) loaded with magnetic α-Fe2O3 nanocrystals were synthesised by one-step solvothermal method using ethanol (EA) as auxiliary solvent (3D-EA-rGO@Fe2O3). The electromagnetic parameters can be tailored by changing Fe₂O₃ content. The 3D-EA-rGO@Fe2O3 foam exhibits outstanding MA properties, reaching a minimum reflection loss (RLmin) of -71.05 dB at 10.8 GHz with a thickness of 2.45 mm, and an effective absorption bandwidth (RL ≤ -10 dB) of 5.87 GHz (11.03–16.90 GHz). Furthermore, the 3D-EA-rGO@Fe2O3 exhibits excellent RCS reduction and remarkable lightweight, which has great application potential to meet the increasingly demands for practical applications of microwave absorption materials.