Constructing interfacial polarization sites within a honeycomb-like porous structure<i>via</i>a spatially confined-etching strategy for boosting electromagnetic wave absorption

Hou, Wenxuan; Wang, Baojun; Li, Shikuo; Huang, Fangzhi; Yang, Hengxiu; Zhang, Hui

doi:10.1039/d3ta03740a

Cited by 16 publications

(1 citation statement)

References 48 publications

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“…Noteworthy, both the carbon crystal lattice defects and graphitic carbon are responsible for the dissipation ability of absorbers and thus can improve the absorption performances. 40–42 Moreover, the Ni/C, Ni/CNs, and Ni/Ni 2 P/CNs-2 samples displayed magnetic hysteresis loops, indicating a typical ferromagnetic behavior. The saturation magnetization ( M s ) values of Ni/C, Ni/CNs, and Ni/Ni 2 P/CNs-2 were 85.57, 62.82, and 34.16 emu g −1 , respectively.…”

Section: Resultsmentioning

confidence: 96%

Optimizing dielectric polarization for electromagnetic wave attenuation via an enhanced Maxwell–Wagner–Sillars effect in hollow carbon microspheres

Wang,

Wu,

Hou

et al. 2023

J. Mater. Chem. A

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Section: Resultsmentioning

confidence: 96%

Optimizing dielectric polarization for electromagnetic wave attenuation via an enhanced Maxwell–Wagner–Sillars effect in hollow carbon microspheres

Wang,

Wu,

Hou

et al. 2023

J. Mater. Chem. A

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Phase Engineering in a Twin‐Phase β/γ‐MoC_x Lightweight Nanoflower with Matched Fermi Level for Enhancing Electron Transport Across the Polarized Interfaces in Electromagnetic Wave Attenuation

Liu,

Wang,

Zhang

et al. 2024

Adv Funct Materials

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The phase engineering of the polarization interface is of great significance in modifying dielectric loss in electromagnetic wave (EMW) attenuation process, but hard to conduct in a complex hybrid system. Herein, a twin‐phase of β/γ‐MoCx@CN with matched Fermi level and closed work function properties in lightweight MoCx nanoflower is constructed, facilitating electron transport withdraw enhanced conductivity and polarization. Moreover, the EMW multiple dissipations among the β/γ‐MoCx@CN polarization interface is promoted, displaying better matched impedance. It delivered a remarkable minimum reflection loss (RLmin) of −74.2 dB at the thickness of 1.5 mm, which far beyond the single phased β‐MoCx@CN, γ‐MoCx@CN and reported MoCx‐based EMW absorbers. The radar cross‐section (RCS) map of β/γ‐MoCx@CN is simulated, showing a brilliant maximum reduction value of 13.6 dB m2 at the theta angle of 30°. This work presented an excellent sample of atomic‐level manipulation of interfacial polarization in dielectric MoCx EMW absorption materials.

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N, O‐Doped Walnut‐Like Porous Carbon Composite Microspheres Loaded with Fe/Co Nanoparticles for Adjustable Electromagnetic Wave Absorption

Dou,

Zhang,

Zhao

et al. 2024

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This study addresses the challenge of designing simple and environmentally friendly methods for the preparation of effective electromagnetic wave (EMW) absorbing materials with tailored microstructures and multi‐component regulation. N, O doped walnut‐like porous carbon composite microspheres loaded with FeCo nanoparticles (WPCM/Fe–Co) are synthesized through high‐temperature carbonization combined with soap‐free emulsion polymerization and hydrothermal methods, avoiding the use of toxic solvents and complex conditions. The incorporation of magnetic components enhances magnetic loss, complementing dielectric loss to optimize EMW attenuation. The unique walnut‐like morphology further improves impedance matching. The proportions of Fe and Co components can be adjusted to regulate the material's reflection loss, thickness, and bandwidth, allowing for fine‐tuning of absorption performance. At a low filling ratio (16.7%), the optimal WPCM/Fe–Co composites exhibit a minimum reflection loss (RLmin) of −48.34 dB (10.33 GHz, 3.0 mm) and an overall effective absorbing bandwidth (EAB) covering the entire C bands, X bands, and Ku bands. This work introduces a novel approach to composition regulation and presents a green synthesis method for magnetic carbon composite absorbers with high‐performance EMW absorption at low loading.

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Constructing interfacial polarization sites within a honeycomb-like porous structureviaa spatially confined-etching strategy for boosting electromagnetic wave absorption

Abstract: Ultra-fine sized Mo2C nanoparticles embedded in a N-doped honeycomb-like porous carbon matrix to construct multiple heterointerfaces.

Cited by 16 publications

References 48 publications

Optimizing dielectric polarization for electromagnetic wave attenuation via an enhanced Maxwell–Wagner–Sillars effect in hollow carbon microspheres

Optimizing dielectric polarization for electromagnetic wave attenuation via an enhanced Maxwell–Wagner–Sillars effect in hollow carbon microspheres

Phase Engineering in a Twin‐Phase β/γ‐MoC_x Lightweight Nanoflower with Matched Fermi Level for Enhancing Electron Transport Across the Polarized Interfaces in Electromagnetic Wave Attenuation

N, O‐Doped Walnut‐Like Porous Carbon Composite Microspheres Loaded with Fe/Co Nanoparticles for Adjustable Electromagnetic Wave Absorption

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Constructing interfacial polarization sites within a honeycomb-like porous structureviaa spatially confined-etching strategy for boosting electromagnetic wave absorption

Abstract: Ultra-fine sized Mo2C nanoparticles embedded in a N-doped honeycomb-like porous carbon matrix to construct multiple heterointerfaces.

Cited by 16 publications

References 48 publications

Optimizing dielectric polarization for electromagnetic wave attenuation via an enhanced Maxwell–Wagner–Sillars effect in hollow carbon microspheres

Optimizing dielectric polarization for electromagnetic wave attenuation via an enhanced Maxwell–Wagner–Sillars effect in hollow carbon microspheres

Phase Engineering in a Twin‐Phase β/γ‐MoCx Lightweight Nanoflower with Matched Fermi Level for Enhancing Electron Transport Across the Polarized Interfaces in Electromagnetic Wave Attenuation

N, O‐Doped Walnut‐Like Porous Carbon Composite Microspheres Loaded with Fe/Co Nanoparticles for Adjustable Electromagnetic Wave Absorption

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Product

Resources

About

Phase Engineering in a Twin‐Phase β/γ‐MoC_x Lightweight Nanoflower with Matched Fermi Level for Enhancing Electron Transport Across the Polarized Interfaces in Electromagnetic Wave Attenuation