Yi Hu, Yijia Zhou, Lijia Liu, Qiang Wang, Chunhong Zhang, Hao Wei, and Yudan Wang, Iron–nitrogen-doped porous carbon absorbers constructed from hyper-crosslinked ferrocene polymers for efficient electromagnetic wave absorption, Int. J. Miner. Metall. Mater.,(2024). https://doi.org/10.1007/s12613-024-2863-2
Cite this article as:
Yi Hu, Yijia Zhou, Lijia Liu, Qiang Wang, Chunhong Zhang, Hao Wei, and Yudan Wang, Iron–nitrogen-doped porous carbon absorbers constructed from hyper-crosslinked ferrocene polymers for efficient electromagnetic wave absorption, Int. J. Miner. Metall. Mater.,(2024). https://doi.org/10.1007/s12613-024-2863-2
Research Article

Iron–nitrogen-doped porous carbon absorbers constructed from hyper-crosslinked ferrocene polymers for efficient electromagnetic wave absorption

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  • Received: 26 December 2023Revised: 21 February 2024Accepted: 22 February 2024Available online: 23 February 2024
  •  Herein, ferrocene and a nitrogen heterocyclic compound (either melamine or imidazole) were hyper-crosslinked via an external crosslinker through a straightforward Friedel–Crafts reaction, leading to the formation of nitrogen-containing hyper-crosslinked ferrocene polymer precursors (HCPs). These precursors were subsequently carbonized to produce iron–nitrogen-doped porous carbon absorbers (Fe-NPCs). The Fe-NPCs feature a porous structure comprising aggregated nanotubes and nanospheres, with porosity that can be modulated by adjusting the iron and nitrogen content to optimize impedance matching. The use of hyper-crosslinked ferrocenes in constructing porous carbon ensures the uniform distribution of Fe-NxC, N dipoles, and α-Fe within the carbon matrix, providing the absorber with numerous polarization sites and a conductive network. The specially designed Fe-NPC-M2 absorbers exhibit satisfactory electromagnetic wave absorption performance, with a minimum reflection loss of −55.3 dB at 2.5 mm and an effective absorption bandwidth of 6.00 GHz at 2.0 mm. This research introduces a novel method for developing highly efficient carbon-based absorbing agents by utilizing hyper-crosslinked polymers as precursors.

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