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<p>In this study, we successfully synthesized N-doped porous carbon material derived from mango peel, decorated with Co/FeCo nanoparticles, using a hydrothermal method followed by high-temperature carbonization. The resulting Co/FeCo/NPC nanocomposites achieved optimal reflection loss of −&#xa0;48.4 dB and effective absorption bandwidth of 5.23&#xa0;GHz in the X band, at 10% filling ratio and matching thickness of 3.4&#xa0;mm. Furthermore, by optimizing the thickness, the absorption peaks facilitate lower frequencies of C-band, with optimal reflection loss of −&#xa0;40.30 dB at 5.68&#xa0;GHz. These remarkable EMW attenuation characteristics are attributed to strong magnetic loss, multiple heterogeneous interface polarization, dipole polarization, and optimal impedance matching. Moreover, coatings based on the Co/FeCo/NPC-3 nanocomposite demonstrated that the radar cross-section was decreased by up to 20.82 dBm<sup>2</sup>, indicating possible radar-absorbing application.</p>

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Composite microwave absorber of nitrogen-doped mango peel derived porous carbon wrapped by Co/FeCo nanoparticles

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年11月11日

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  • Tauqeer Haidar Qamar,
  • Lianwen Deng,
  • Sibt ul Hassan,
  • Nouman Ahmed,
  • Muhammad Javed Qasim,
  • Sain Bux Jamali,
  • Khadija Kausar,
  • Shengxiang Huang

摘要

In this study, we successfully synthesized N-doped porous carbon material derived from mango peel, decorated with Co/FeCo nanoparticles, using a hydrothermal method followed by high-temperature carbonization. The resulting Co/FeCo/NPC nanocomposites achieved optimal reflection loss of − 48.4 dB and effective absorption bandwidth of 5.23 GHz in the X band, at 10% filling ratio and matching thickness of 3.4 mm. Furthermore, by optimizing the thickness, the absorption peaks facilitate lower frequencies of C-band, with optimal reflection loss of − 40.30 dB at 5.68 GHz. These remarkable EMW attenuation characteristics are attributed to strong magnetic loss, multiple heterogeneous interface polarization, dipole polarization, and optimal impedance matching. Moreover, coatings based on the Co/FeCo/NPC-3 nanocomposite demonstrated that the radar cross-section was decreased by up to 20.82 dBm2, indicating possible radar-absorbing application.