Insights into polarization relaxation of electromagnetic wave absorption

Cell Reports Physical Science, Год журнала: 2024, Номер 5(9), С. 102206 - 102206

Опубликована: Сен. 1, 2024

Язык: Английский

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Regulating the Morphology of Mofs-Derived for Broadband Electromagnetic Wave Absorption

Опубликована: Янв. 1, 2025

For adapting to the complex electromagnetic environment, developing materials with tunable morphology enabling broadband wave (EMW) absorption is undoubtedly a challenging task. In this work, Y2O3/Ni@ N-doped carbon (YNC) composites were prepared by solvothermal method and high-temperature carbonization using metal-organic frameworks (MOFs) as raw materials. By adjusting molar ratio of Y3+/Ni2+, changed from microsphere spiky microspheres, then dumbbell-shape, different morphologies achieved tune impedance matching. Especially, microspheres exhibited stronger EMW performance than other morphologies. When Y3+/Ni2+ was 3:7, minimum reflection loss YNC reached −64.74 dB at 25 wt% filling ratio. At thickness 2.02 mm, effective bandwidth value 6.56 GHz (11.44−18.00 GHz), covering entire Ku band. Notably, controllable matching porous structure in multiple bands (C, X, Ku). The superior attributed composites, achieving balance attenuation capacity. Furthermore, presence magnetic Ni nanoparticles provided capability for composites. Density functional theory indicated that formation heterostructures boosted carrier mobility, facilitating electron transfer across interfaces, thus increasing interfacial polarization. Therefore, study offered novel approach designing rare-earth based MOFs derived absorbers capability.

Язык: Английский

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Phase Engineering of MoS₂ via Anderson‐Type Polyoxometalate Precursor for Efficient Electromagnetic Wave Absorption

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Март 10, 2025

Abstract Molybdenum disulfide (MoS 2 ) with tunable phase transformation, especially high 1T‐phase content, has been a promising electromagnetic wave (EMW) absorber. However, precise regulation of MoS transformation still remain challenges. Herein, facile Anderson‐type polyoxometalate (XMo 6 ,X = Cr, Mn, Fe, Co, Ni) precursor strategy is reported to construct ‐based bimetallic sulfide hybridsfor regulating permittivity and EMW absorption. The well‐defined structures tailorable compositions XMo offer the opportunity conduct controllable on engineering . disparity transition metal sulfides (TMSs) in chemical reactivity leads sulfur vacancy (V s ), which induces from 2H 1T. tuning electronic structure enables permittivity, further verified by density‐functional theory (DFT) calculations. optimized FeS/MoS /carbon fiber powder richer 1T‐phase, V , heterointerfaces multi‐component, exhibit minimum reflection loss −51.82 dB (1.72 mm) an effective absorption bandwidth 6.1 GHz (1.64 mm). This work establishes logical relationship between intrinsic absorption, offering method for permittivity.

Язык: Английский

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Tunable 1 T-Phase MoS2/CNT reinforced carbon foams for enhanced low-frequency electromagnetic wave absorption

Chemical Engineering Journal, Год журнала: 2025, Номер unknown, С. 162574 - 162574

Опубликована: Апрель 1, 2025

Язык: Английский

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Electromagnetic Wave Absorption of 1T’ WTe2/SBA-15 Composites in the S Band Enhanced through Heterogeneous Interfaces and Defect Engineering

Ceramics International, Год журнала: 2025, Номер unknown

Опубликована: Апрель 1, 2025

Язык: Английский

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Hetero-structured construction of RGO nanosheets decorated by flower-like MoS2 toward the regulation of electromagnetic wave absorption performance

Materials Today Physics, Год журнала: 2024, Номер unknown, С. 101631 - 101631

Опубликована: Дек. 1, 2024

Язык: Английский

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Preparation of presulfided oil-soluble NiMo catalyst for slurry bed hydrocracking of vacuum residue

Chemical Engineering Journal, Год журнала: 2024, Номер 498, С. 155166 - 155166

Опубликована: Авг. 25, 2024

Язык: Английский

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ZnFe-layered double oxide/MoS2 coated waste cotton fabric with visible-light photocatalytic/photothermal functionality for water purification

Journal of Water Process Engineering, Год журнала: 2024, Номер 69, С. 106874 - 106874

Опубликована: Дек. 27, 2024

Язык: Английский

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