The Elaborate Design of Multi‐Polarization Effect by Non‐Edge Defect Strategy for Ultra‐Broad Microwave Absorption

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(44)

Published: May 21, 2024

Abstract Anion defect engineering is proven to be an efficient approach reconstruct the electronic configuration of carbon‐based magnetoelectric materials for targeted modulation electromagnetic (EM) performance. However, traditional mono‐anionic doping suffers from low concentration and lacks diverse polarization mechanisms. In this work, multi‐anions (N/S/F) stepwise‐doped carbon/Fe 3 C composites are elaborately constructed, wherein predesigned N defects serve as activated sites anomalously adopting S anions (Step I) subsequent F II) in non‐marginal areas carbon layer. It found that prefers replace pyrrolic while tends form dangling bonds with site adjacent pyridinic N. Intriguingly, besides inherent polarized resonance at ≈15 GHz, customized induce new resonances ≈10 GHz ≈15+ respectively. Under a typical multi‐polarization effect synergetic magnetic response, N/S/F harvest broadest bandwidth 8.28 (9.72–18 GHz) 2.55 mm, covering wide frequency range almost X Ku bands. This work demonstrates positive impact localized multi‐defects customization on expanding microwave absorption bandwidth, providing valuable insights advanced design ultra‐broadband absorbers.

Language: Английский

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Recent progress in carbon-based materials and loss mechanisms for electromagnetic wave absorption

Carbon, Journal Year: 2024, Volume and Issue: 219, P. 118834 - 118834

Published: Jan. 18, 2024

Language: Английский

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A Liquid‐Metal‐Assisted Competitive Galvanic Reaction Strategy Toward Indium/Oxide Core−Shell Nanoparticles with Enhanced Microwave Absorption

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(18)

Published: Jan. 14, 2024

Abstract The preparation of core–shell structured nanoparticles using the galvanic replacement reaction liquid metals is a simple and efficient method. However, precise modulation core shell components to regulate microwave absorption performance still needs be further explored. In this study, various types indium/oxide are prepared based on competitive gallium‐indium metals. exhibit superior electromagnetic (EM) wave properties with minimum reflection loss (RL) −40.25 dB at 1.7 mm widest effective band 6.12 GHz 2.1 mm. wave‐absorbing originate from dielectric losses interfacial dipole polarizations. addition, an externally applied magnetic field improves polarization dissipation achieve RL −45.65 2.4 liquid‐metal‐assisted strategies extend variety for applications.

Language: Английский

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Dual Cross‐Linked Magnetic MXene Aerogel with High Strength and Durability Enables Multifunctionality

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(33)

Published: April 1, 2024

Abstract The construction of lightweight yet robust, durable magnetic transition metal carbides and/or nitride (MXene) aerogels is highly desired for assembling high‐performance, multifunctional architectures. However, the fabrication and application MXene severely restricted by their inferior mechanical strength poor water/oxygen resistance. Here, sustainable cellulose nanofibrils (CNFs) are employed assisting in physical chemical dual cross‐linking to strongly bind MXenes MOF‐derived nanoparticles. dual‐crosslinked (D‐MMAs) achieve a density as low 12 mg cm −3 , acquire significantly improved up 1311% over physically crosslinked ones, well remarkably hydrophobicity, oxidation stability. Furthermore, integration efficient tunable electromagnetic wave (EMW) absorption, remarkable photothermal conversion, thermal insulation, prominent oil‐water separation, thin/thick oil dye absorption capability, remote controllability accomplished. Notably, D‐MMA performs maximum intensity −63.9 dB, accomplishes specific reflection loss −1105 dB mm −1 comparable best MXene‐based EMW absorbers ever reported. Given its facile, scalable, manufacturing approach, D‐MMAs hold great prospects various fields next‐generation electronics, special equipment protection, defense, aerospace.

Language: Английский

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MXene@c-MWCNT Adhesive Silica Nanofiber Membranes Enhancing Electromagnetic Interference Shielding and Thermal Insulation Performance in Extreme Environments

Nano-Micro Letters, Journal Year: 2024, Volume and Issue: 16(1)

Published: May 14, 2024

A lightweight flexible thermally stable composite is fabricated by combining silica nanofiber membranes (SNM) with MXene@c-MWCNT hybrid film. The SNM outstanding thermal insulation are prepared from tetraethyl orthosilicate hydrolysis and condensation electrospinning high-temperature calcination; the

Language: Английский

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Fabrication of hollow Ni/NiO/C/MnO2@polypyrrole core-shell structures for high-performance electromagnetic wave absorption

Composites Part B Engineering, Journal Year: 2024, Volume and Issue: 275, P. 111344 - 111344

Published: Feb. 24, 2024

Language: Английский

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Component optimization and microstructure design of carbon nanotube-based microwave absorbing materials: A review

Carbon, Journal Year: 2023, Volume and Issue: 217, P. 118651 - 118651

Published: Nov. 22, 2023

Language: Английский

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A review of how to improve Ti3C2Tx MXene stability

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 496, P. 154097 - 154097

Published: July 19, 2024

Language: Английский

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Dynamic Adaptive Wrinkle‐Structured Silk Fibroin/MXene Composite Fibers for Switchable Electromagnetic Interference Shielding

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Feb. 5, 2024

Abstract Flexible and dynamic adaptive conductive composite fibers are demanded for functional fabrics wearable devices, yet the weak interfaces often impair critical performances complicated application scenarios. Here, a general scalable strategy is proposed to construct robust reversible wrinkle structures on regenerated silk fibroin (RSF) fiber with 2D nanomaterials (i.e., MXene, graphene) by wet‐spinning technique. The conformation transition of core‐shell modulus mismatching together responsible formation wrinkled structures. Then, it effectively optimizes between assembled substrate, which significantly reinforce fibers, complete pathways, endow exceptional robustness durability. MXene‐based shows high conductivity ≈1125 S cm −1 , far superior tensile strength 214.3 ± 6.8 MPa toughness 15.2 1.5 MJ m −3 as compared RSF fiber. More interestingly, transformable structure further modulates surface behaviors properties such switchable shielding from “off‐state” “on‐state” induced humidity. Additionally, integration mechanical flexibility outstanding capacitance (≈829 F ) expects great promise self‐powered electronics, intelligent fabrics.

Language: Английский

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Fabrication of MOF-rGO aerogels to enhance electromagnetic wave absorption by adjusting the morphology and structure of MOFs by electron transfer

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 489, P. 151384 - 151384

Published: April 16, 2024

Language: Английский

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