Interfacial Polarization Loss Improvement Induced by the Hollow Engineering of Necklace‐like PAN/Carbon Nanofibers for Boosted Microwave Absorption

Advanced Functional Materials, Год журнала: 2024, Номер unknown

Опубликована: Фев. 28, 2024

Abstract Rational manipulation of composition and microstructure design is recognized as an effective pathway to realize multifunctional high‐performance microwave absorber. In this work, necklace‐like hollow polyacrylonitrile (PAN)/carbon nanofibers are designed constructed through a simple continuous electrospinning‐carbonization‐etching route. Specifically, by varying the carbonization temperature, ratio PAN carbon content PAN/carbon can be effectively regulated, resulting in tunable electromagnetic parameters conductive loss capacities. After that, structure further introduced improve feature lightweight, impedance‐matching characteristics, interfacial polarization ability. Accordingly, exhibited frequency bandwidth 6.60 GHz minimum reflection −44.73 dB at 1.76 mm. Both experimental theoretical simulation results indicated that obtained possessed high chemical stability excellent absorbing performance, endowing them candidates for absorbers extreme conditions. Therefore, findings not only offered rationally manipulate but also provided novel technique make most engineering strengthening interface loss.

Язык: Английский

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In Situ Atomic Reconstruction Engineering Modulating Graphene-Like MXene-Based Multifunctional Electromagnetic Devices Covering Multi-Spectrum

Nano-Micro Letters, Год журнала: 2024, Номер 16(1)

Опубликована: Апрель 15, 2024

With the diversified development of big data, detection and precision guidance technologies, electromagnetic (EM) functional materials devices serving multiple spectrums have become a hot topic. Exploring multispectral response is challenging meaningful scientific question. In this study, MXene/TiO

Язык: Английский

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Constructing Built-In Electric Fields with Semiconductor Junctions and Schottky Junctions Based on Mo–MXene/Mo–Metal Sulfides for Electromagnetic Response

Nano-Micro Letters, Год журнала: 2024, Номер 16(1)

Опубликована: Июнь 11, 2024

Abstract The exploration of novel multivariate heterostructures has emerged as a pivotal strategy for developing high-performance electromagnetic wave (EMW) absorption materials. However, the loss mechanism in traditional is relatively simple, guided by empirical observations, and not monotonous. In this work, we presented semiconductor–semiconductor–metal heterostructure system, Mo–MXene/Mo–metal sulfides (metal = Sn, Fe, Mn, Co, Ni, Zn, Cu), including semiconductor junctions Mott–Schottky junctions. By skillfully combining these distinct functional components (Mo–MXene, MoS 2 , metal sulfides), can engineer multiple heterogeneous interface with superior capabilities, broad effective bandwidths, ultrathin matching thickness. successful establishment gives rise to built-in electric field that intensifies electron transfer, confirmed density theory, which collaborates dielectric polarization mechanisms substantially amplify EMW absorption. We detailed synthesis series featuring both semiconductor–semiconductor semiconductor–metal interfaces. achievements were most pronounced Mo–MXene/Mo–Sn sulfide, achieved remarkable reflection values − 70.6 dB at thickness only 1.885 mm. Radar cross-section calculations indicate MXene/Mo–metal have tremendous potential practical military stealth technology. This work marks departure from conventional component design limitations presents pathway creation advanced MXene-based composites potent capabilities.

Язык: Английский

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Multifunctional electromagnetic wave absorbing carbon fiber/Ti3C2TX MXene fabric with superior near-infrared laser dependent photothermal antibacterial behaviors

Journal of Colloid and Interface Science, Год журнала: 2024, Номер 676, С. 217 - 226

Опубликована: Июль 14, 2024

Язык: Английский

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Enhanced electromagnetic wave absorption of bacterial cellulose/ reduced graphene oxide aerogel by eco-friendly in-situ construction

Journal of Colloid and Interface Science, Год журнала: 2024, Номер 678, С. 648 - 655

Опубликована: Авг. 26, 2024

Язык: Английский

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Hierarchical Engineering on Built‐In Electric Field of Bimetallic Zeolitic Imidazolate Derivatives Towards Amplified Dielectric Loss

Advanced Functional Materials, Год журнала: 2024, Номер unknown

Опубликована: Окт. 7, 2024

Abstract Construction of built‐in electric field (BIEF) in nanohybrids has been demonstrated as an efficacious strategy to boost the dielectric loss by facilitating oriented transfer and transition charges, thus optimizing electromagnetic wave absorption property. However, specific influence BIEF on interface polarization needs explore thoroughly strength should be further augmented. Herein, several systems incorporated Mott–Schottky heterojunctions hollow structures are designed constructed, where bimetallic zeolitic imidazolate framework employed derive Cu‐ZnO heterojunctions, hierarchical enriched introducing structure reduced graphene oxide. The well‐established “double” verified theoretical calculation engineering can regulate conductivity, enhance relaxation effectively. Especially, there always coexisted both enhanced charge separation reversed distribution this BIEF, boosting polarization. Attributing synergy well‐matched impedance amplified loss, obtained hybrids exhibited superior (reflection −46.29 dB ultra‐wide effective bandwidth 7.6 GHz at only 1.6 mm). This work proves innovative model for dissecting mechanisms pioneers a novel advanced absorbers through enhancing BIEF.

Язык: Английский

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Dual magnetic particles modified carbon nanosheets in CoFe/Co@NC heterostructure for efficient electromagnetic synergy

Soft Science, Год журнала: 2024, Номер 4(4)

Опубликована: Ноя. 30, 2024

Dual magnetic particles-modified carbon materials have great potential in terms of ultrathin thickness (≤ 2 mm) and super electromagnetic wave (EMW) absorption -70 dB). Herein, using CoFe-metal-organic framework (MOF)-derived CoFe/Co@NC heterostructures composed hollow CoFe nanospheres, solid Co nitrogen-doped (NC) nanosheets, we demonstrate how the dual particles regulate response behavior heterostructure thus steer efficient EMW performance. That is, inherits an ultra-strong reflection loss (R L) -73.8 dB at 1.78 mm. The effective bandwidth (EAB) value is also available up to 5.4 GHz. Moreover, computer simulation technology (CST) simulations reveal good radar stealth effect heterostructures. Experimentally, outstanding due a large number heterointerfaces, conductive networks nanoparticles, which bring considerable interface polarization, conduction loss, characteristics. These findings underscore importance synergy induced by for steering absorbers.

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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Porous-Multilayered Ti3C2Tx MXene Hybrid Carbon Foams for Tunable and Efficient Electromagnetic Wave Absorption

Carbon, Год журнала: 2024, Номер 229, С. 119477 - 119477

Опубликована: Июль 22, 2024

Язык: Английский

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Controllable synthesis of CeFeO3/Fe+2Fe2+3O4/C composites with improved microwave absorption performances

Carbon, Год журнала: 2024, Номер 222, С. 118972 - 118972

Опубликована: Фев. 26, 2024

Язык: Английский

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