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<p>Carbon materials possess inherent dielectric properties that enhance electromagnetic wave (EMW) absorption. However, their single-loss mechanism often restricts the effective bandwidth, while traditional carbon-based EMW absorbing materials face constraints owing to expensive raw materials and complex synthesis processes, hindering industrialization. To address these challenges, we utilize cost-effective and readily available metal phthalocyanine as a precursor. The incorporation of magnetic metal components induces magnetic loss mechanisms that effectively compensate for the predominant dielectric characteristics of the carbon matrix. Through a simple grinding and carbonization process, metal nanoparticles are uniformly dispersed within a nitrogen-doped carbon matrix, thereby creating numerous defects and abundant heterogeneous interfaces. The resulting composites exhibit exceptional EMW absorption, attributed to synergistic multiple-loss mechanisms. Notably, the CuCoNiZn/NC composite attains an effective absorption bandwidth (EAB) of 5.6&#xa0;GHz, while the Cu/NC composite achieves a minimum reflection loss (RL<sub>min</sub>) of −53.7&#xa0;dB with an EAB of 5.52&#xa0;GHz. Additionally, CST simulations validate the practical applicability of the absorber. This study presents a viable pathway for industrializing high-performance wave-absorbing materials.</p> Graphical Abstract <p></p>

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Metal tuning in metal-phthalocyanine derived carbon nanocomposites for broadband electromagnetic wave absorption

  • 期刊论文

  • 发表日期：

    2025年8月29日

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  • Ying-Zhi Jiao,
  • Jing-Lei Zhang,
  • Zi-Yang Dai,
  • Meng-Na Feng,
  • Dao-Hu Sheng,
  • Si-Yao Cheng,
  • Ju-Hua Luo

摘要

Carbon materials possess inherent dielectric properties that enhance electromagnetic wave (EMW) absorption. However, their single-loss mechanism often restricts the effective bandwidth, while traditional carbon-based EMW absorbing materials face constraints owing to expensive raw materials and complex synthesis processes, hindering industrialization. To address these challenges, we utilize cost-effective and readily available metal phthalocyanine as a precursor. The incorporation of magnetic metal components induces magnetic loss mechanisms that effectively compensate for the predominant dielectric characteristics of the carbon matrix. Through a simple grinding and carbonization process, metal nanoparticles are uniformly dispersed within a nitrogen-doped carbon matrix, thereby creating numerous defects and abundant heterogeneous interfaces. The resulting composites exhibit exceptional EMW absorption, attributed to synergistic multiple-loss mechanisms. Notably, the CuCoNiZn/NC composite attains an effective absorption bandwidth (EAB) of 5.6 GHz, while the Cu/NC composite achieves a minimum reflection loss (RLmin) of −53.7 dB with an EAB of 5.52 GHz. Additionally, CST simulations validate the practical applicability of the absorber. This study presents a viable pathway for industrializing high-performance wave-absorbing materials.

Graphical Abstract