Zeolite imidazolate framework derived efficient absorbers: from morphology modulation to component regulation

Journal of Alloys and Compounds, Год журнала: 2024, Номер 1010, С. 177092 - 177092

Опубликована: Окт. 16, 2024

Язык: Английский

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Mineral-based electromagnetic wave absorbers and shields: Latest progress and perspectives

Journal of Alloys and Compounds, Год журнала: 2025, Номер unknown, С. 179884 - 179884

Опубликована: Март 1, 2025

Язык: Английский

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Constructing core-shell structural bimetallic CoNi alloys doped carbon aerogels for highly efficient electromagnetic wave absorption

Journal of Alloys and Compounds, Год журнала: 2025, Номер unknown, С. 178854 - 178854

Опубликована: Янв. 1, 2025

Язык: Английский

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Highly Mixed Index Facet Engineering Induces Defect Formation and Converts the Wave‐Transmissive Mott Insulator NiO into Electromagnetic Wave Absorbent

Advanced Materials, Год журнала: 2024, Номер unknown

Опубликована: Ноя. 26, 2024

Mott insulator possesses the property of converting into semiconductor under supernormal conditions and achieving insulator-semiconductor transition (IST) holds great scientific value. Nevertheless, current IST methodologies possess certain limitations because they are not capable being implemented conventional conditions, thereby limiting their practical applications. Herein, a highly mixed index facets (HMIF) strategy is proposed to construct homogeneous interfaces with gradient work function (WF) in NiO, accompanied by numerous oxygen vacancies. These vacancies provide additional defect energy levels inhomogeneous charge distributions, resulting 180 fold enhancement conductivity, realizing process, inducing polarization. In addition, HMIF configuration induces electron transport along WF, ultimately leading accumulation on specific facet. This allows this facet can be considered as dipole its adjacent makes NiO attenuate electromagnetic waves (EMW) through Therefore, exposed improved EMW absorption properties (80-fold higher than that commercial NiO), from EMW-transmissive EMW-absorbing materials. research presents an approach for discovers polarization behavior occurred facet, extends potential application absorption.

Язык: Английский

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Electron Migratory Polarization of Interfacial Electric Fields Facilitates Efficient Microwave Absorption

Advanced Functional Materials, Год журнала: 2024, Номер unknown

Опубликована: Окт. 7, 2024

Abstract High‐performance microwave absorption materials (MAM) are often accompanied by synergistic effects of multiple loss mechanisms, but the contribution share various mechanisms has been neglected to provide a template and reference for design MAM. Here, highly conductive 2D structure is designed through functional group‐induced modulation strategy, composite L‐Ni@C can reach an effective bandwidth 6.45 GHz at 15% fill rate, with maximum efficiency 99.9999%. Through layer‐by‐layer analysis mechanism, it found that strong originates from polarization heterogeneous interface. The movement space charge between two‐phase interface forms interfacial electric field, in situ doping nitrogen cleverly achieved introduction amino groups, which significantly enhances rate transfer greatly facilitates electron migration polarization. motion law field also simulated using COMSOL simulation software illustrate mechanism interfaces. This work fills gap structural presents new theories into

Язык: Английский

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Air-microwave simultaneously induced carbon fiber surface oxidation and magnetism adjustment by CoOx nanoparticles rapid assembly for interface enhancement and electromagnetic wave absorption of its composites

Journal of Colloid and Interface Science, Год журнала: 2024, Номер 678, С. 785 - 794

Опубликована: Авг. 28, 2024

Язык: Английский

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High‐Density Dual Atoms Pairs Coupling for Efficient Electromagnetic Wave Absorbers

Small, Год журнала: 2024, Номер unknown

Опубликована: Ноя. 27, 2024

Abstract Dual atoms (DAs), characterized by flexible structural tunability and high atomic utilization, hold significant promise for atom‐level coordination engineering. However, the rational design with high‐density heterogeneous DAs pairs to promote electromagnetic wave (EMW) absorption performance remains a challenge. In this study, Ni─Cu coupled absorbers are precisely constructed on nitrogen‐rich carbon substrate, achieving an impressive metal loading amount of 4.74 wt.%, enabling huge enhancement effective bandwidth (EAB) EMW from 0 7.8 GHz. Furthermore, minimum reflection loss (RL min ) is −70.96 dB at matching thickness 3.60 mm, corresponding >99.99% incident energy. Both experimental results theoretical calculations indicate that synergistic effect sites in transfer electron‐rich initial N Cu sites, which induces strong asymmetric polarization redistribution local charge significantly improves performance. This work not only provides strategy preparation DA but also demonstrates role tuning symmetry level.

Язык: Английский

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Magnetic properties and dual band microwave absorption in conjunction with red shifted resonance of γ-Fe2O3 linked with 2-BOP dispersed on graphene oxide

Materials Research Bulletin, Год журнала: 2025, Номер unknown, С. 113319 - 113319

Опубликована: Янв. 1, 2025

Язык: Английский

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Heterogeneous three-dimensional FeSiAl@SiO₂@MoS₂ composite with a SiO₂ wave-transmitting layer for enhanced electromagnetic wave absorption performance

Journal of Materials Chemistry A, Год журнала: 2024, Номер 12(37), С. 25322 - 25333

Опубликована: Янв. 1, 2024

The incorporation of wave-transparent SiO 2 layer expands the incidence area for EMWs, which significantly enhances electromagnetic wave absorption performance FeSiAl@SiO @MoS .

Язык: Английский

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Improved Interfacial Interactions by Core–Shell CoFe₂O₄@SiO₂ Composites to Enhance the Ability of Corrosion Resistance and Electromagnetic Wave Absorption

Small, Год журнала: 2024, Номер unknown

Опубликована: Окт. 10, 2024

With the rapid development of science and technology, stealth anti-corrosion activities in oceans have attracted widespread attention. This study successfully prepares CoFe

Язык: Английский

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