Scholarlink

<p>Porous carbon-based materials are widely regarded as a kind of electromagnetic interference (EMI) shielding materials with great development prospects due to their lightweight characteristics and excellent dielectric properties. In this study, by combining the simple chemical blowing technique and the in situ carbonization method, we have successfully prepared N-doped hierarchical porous carbon (FeNPC) composites loaded with FeN<sub>x</sub>/Fe magnetic nanoparticles. The research found that the introduction of urea not only endowed the system with a complete hierarchical porous structure, but also allowed the magnetic components to be primarily Fe and FeN<sub>x</sub> by appropriately adjusting the carbonization temperature of the system. Thanks to the three-dimensional (3D) interconnected network, distinctive hierarchical porous architecture, N-element doping, and the mutual enhancement of dielectric carbon and magnetic components of the system, the EMI shielding performance could be significantly improved. When the urea content was 0.5&#xa0;g, and the mixing mass ratio of the resulting composite material (FeNPC0.5) with paraffin was 4:6, the EMI shielding effectiveness could reach up to 95.3&#xa0;dB (3&#xa0;mm) in the X-band (8.2–12.4&#xa0;GHz). This research offers a new approach for developing and fabricating high-performance EMI shielding materials through a simple synthesis strategy.</p> Graphical Abstract <p>The FeNPC composites with FeN<sub>x</sub>/Fe magnetic nanoparticles dispersed in the N-doped hierarchical porous carbon have been successfully prepared through simple chemical blowing technique and in situ carbonization method. By appropriately adjusting the urea content and carbonization temperature of the system, a high-performance electromagnetic interference (EMI) shielding effectiveness (SE) of up to 95.3 dB could be obtained in the X-band (8.2–12.4 GHz) frequency range when the urea content was 0.5 g and the temperature was 800 °C.</p> <p></p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Facial fabrication of hierarchically 3D FeNx/Fe@N-doped porous carbon frameworks for enhanced electromagnetic interference shielding in X-band

  • 期刊论文

  • 发表日期：

    2026年4月23日

查看全文
  • Yumei Ren,
  • Zhen Qin,
  • Tong Xi,
  • Zixuan Zhang,
  • Yue Li,
  • Keye Zhao,
  • Jiandong Guo,
  • Desheng Feng,
  • Xiaoqin Guo,
  • Biao Zhao

摘要

Porous carbon-based materials are widely regarded as a kind of electromagnetic interference (EMI) shielding materials with great development prospects due to their lightweight characteristics and excellent dielectric properties. In this study, by combining the simple chemical blowing technique and the in situ carbonization method, we have successfully prepared N-doped hierarchical porous carbon (FeNPC) composites loaded with FeNx/Fe magnetic nanoparticles. The research found that the introduction of urea not only endowed the system with a complete hierarchical porous structure, but also allowed the magnetic components to be primarily Fe and FeNx by appropriately adjusting the carbonization temperature of the system. Thanks to the three-dimensional (3D) interconnected network, distinctive hierarchical porous architecture, N-element doping, and the mutual enhancement of dielectric carbon and magnetic components of the system, the EMI shielding performance could be significantly improved. When the urea content was 0.5 g, and the mixing mass ratio of the resulting composite material (FeNPC0.5) with paraffin was 4:6, the EMI shielding effectiveness could reach up to 95.3 dB (3 mm) in the X-band (8.2–12.4 GHz). This research offers a new approach for developing and fabricating high-performance EMI shielding materials through a simple synthesis strategy.

Graphical Abstract

The FeNPC composites with FeNx/Fe magnetic nanoparticles dispersed in the N-doped hierarchical porous carbon have been successfully prepared through simple chemical blowing technique and in situ carbonization method. By appropriately adjusting the urea content and carbonization temperature of the system, a high-performance electromagnetic interference (EMI) shielding effectiveness (SE) of up to 95.3 dB could be obtained in the X-band (8.2–12.4 GHz) frequency range when the urea content was 0.5 g and the temperature was 800 °C.