Enhanced Electromagnetic Energy Conversion in an Entropy‐driven Dual‐magnetic System for Superior Electromagnetic Wave Absorption

Advanced Functional Materials, Год журнала: 2024, Номер unknown

Опубликована: Окт. 29, 2024

Abstract Thermochemical conversion is a highly effective method for upgrading organic solid wastes into high‐value materials, contributing to carbon neutrality and peak, emission goals. It also serves as pathway develop energy‐efficient electromagnetic wave absorbing (EMWA) materials. In this study, fish skin successfully in situ nitrify Prussian Blue Fe 3 N under external thermal driving condition, resulting high saturation magnetization utilized. The N@C demonstrates outstanding EMWA property, achieving minimum reflection loss of −71.3 dB. Furthermore, by introducing cellulose nanofiber, portion the iron nitride transformed carbide, C/Fe N@C. This composite exhibits enhanced properties owing wider local charge redistribution stronger electronic interactions, an absorption bandwidth ( EAB ) 6.64 GHz. Electromagnetic simulations first‐principles calculations further elucidate mechanism, maximum reduction value radar‐cross section reached 37.34 dB·m 2 . design multilayer gradient metamaterials demonstrated ultra‐broadband 11.78 paper presents efficient strategy atomic‐level biomass waste utilization prepare N, provides novel insights between metal nitrides carbides, offers promising direction development advanced

Язык: Английский

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Conductive Metal–Organic Frameworks and Their Electrocatalysis Applications

ACS Nano, Год журнала: 2025, Номер unknown

Опубликована: Март 9, 2025

Recently, electrically conductive metal–organic frameworks (EC-MOFs) have emerged as a wealthy library of porous with unique properties, allowing their use in diverse applications energy conversion, including electrocatalysis. In this review, the electron conduction mechanisms EC-MOFs are examined, while electrical conductivities considered. There been various strategies to enhance MOFs ligand modification, incorporation conducting materials, and construction multidimensional architectures. With sufficient being established for EC-MOFs, there extensive pursuits electrocatalysis applications, such hydrogen evolution reaction, oxygen reduction N2 CO2 reaction. addition, computational modeling also exerts an important impact on revealing synthesis–structure–performance relationships. Finally, prospects current challenges discussed provide guidelines designing promising framework materials.

Язык: Английский

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Vertically aligned hollow Ag@Ni tubes for synergistic EMI shielding and enhancing the thermal conductivities of epoxy composites

Applied Materials Today, Год журнала: 2025, Номер 44, С. 102741 - 102741

Опубликована: Апрель 22, 2025

Язык: Английский

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Integration of Asymmetric Multi‐Path Hollow Structure and Multiple Heterogeneous Interfaces in Fe₃O₄@C@NiO Nanoprisms Enabling Ultra‐Low and Broadband Absorption

Small, Год журнала: 2025, Номер unknown

Опубликована: Янв. 23, 2025

Abstract A reasonable construction of hollow structures to obtain high‐performance absorbers is widely studied, but it still a challenge select suitable materials improve the low‐frequency attenuation performance. Here, Fe 3 O 4 @C@NiO nanoprisms with unique tip shapes, asymmetric multi‐path cavity, and core–shell heteroepitaxy structure are designed synthesized based on anisotropy intrinsic physical characteristics. Impressively, by changing load NiO, composites achieve strong absorption, broadband, absorption: reflection loss −55.8 dB absorption bandwidth 9.9 GHz covers both low high frequency (2.9–6.1 11.3–18 GHz). The constructed anisotropic heterointerface can optimize impedance matching for (3.8–7.9 GHz) almost completely covering 5G band. Especially, influence path interface polarization ferromagnetic coupling behavior revealed through simulation electric magnetic field distribution using High‐Frequency Structure Simulator (HFSS). In addition, HFSS shows that Radar Cross‐Sectional (RCS) value absorber at any angle <−10 m 2 , which meets complex requirements in practical application. This research paves new way development efficient composition design.

Язык: Английский

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Cross-Linked Polyurethane/Bimetallic MOF-Derived Composites with Electromagnetic Wave-Absorbing, Self-Healing, and Recyclable Capabilities

ACS Applied Nano Materials, Год журнала: 2025, Номер unknown

Опубликована: Янв. 25, 2025

Язык: Английский

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Investigation of structural, hysteresis, and microwave dielectric/magnetic properties of Co-Zn doped M-type strontium hexaferrites for light-weight microwave absorber applications

Emergent Materials, Год журнала: 2025, Номер unknown

Опубликована: Фев. 20, 2025

Язык: Английский

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Construction and electromagnetic wave absorption properties of polypyrrole encapsulated Ni-MOF nanoflower derivatives

Journal of Materials Science Materials in Electronics, Год журнала: 2025, Номер 36(9)

Опубликована: Март 1, 2025

Язык: Английский

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Nanoconfinement Strategy for Lightweight Feconi/N-Doped Carbon Nanotubes with Broadband Electromagnetic Absorption

Опубликована: Янв. 1, 2025

Язык: Английский

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Nanoconfinement Strategy for Lightweight FeCoNi/N-Doped Carbon Nanotubes with Broadband Electromagnetic Absorption

Materials Research Bulletin, Год журнала: 2025, Номер unknown, С. 113548 - 113548

Опубликована: Май 1, 2025

Язык: Английский

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Temperature‐Robust Broadband Metamaterial Absorber via Semiconductor MOFs/Paraffin Hybridization

Small, Год журнала: 2024, Номер unknown

Опубликована: Дек. 31, 2024

The demand for temperature-robust electromagnetic wave (EMW) absorption materials is escalating due to the varying operational temperatures of electronic devices, which can easily soar up 100 °C, significantly affecting EMW interference management. Traditional absorbers face performance degradation across broad temperature ranges alterations in mobility and material impedance. This study presented a novel approach by integrating semiconductor metal-organic frameworks (SC-MOFs) with paraffin wax (PW), leveraging precise control interlayer spacing SC-MOFs electron regulation introduction temperature-inert properties. synergistic strategy enhanced dielectric properties impedance matching from ambient °C. A metamaterial shell layer, designed through finite element simulation fabricated 3D printing, encapsulated composite, resulting broadband absorber an 11.81 GHz effective bandwidth nearly unchanged peak position 25-100 paves way advanced management capable operating reliably extreme environments.

Язык: Английский

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