Multiphase Molybdenum Carbide Doped Carbon Hollow Sphere Engineering: The Superiority of Unique Double‐Shell Structure in Microwave Absorption

Small, Journal Year: 2022, Volume and Issue: 19(6)

Published: Nov. 27, 2022

In order to achieve excellent electromagnetic wave (EMW) absorption properties, the microstructure design and component control of absorber are critical. this study, three different structures made Mo2 C/C hollow spheres prepared their microwave behavior is investigated. The double-shell consisting an outer thin shell inner rough thick with multiple EMW loss mechanisms exhibit good properties. further improve MoC1-x /C crystalline phases molybdenum carbide optimize capability materials. Finally, α-phase have best When filling 20 wt.%, minimum reflection at 1.8 mm -50.55 dB effective bandwidth 2 5.36 GHz, which expected be a characteristics "thin, light, wide, strong".

Language: Английский

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Defect and interface engineering in core@shell structure hollow carbon@MoS2 nanocomposites for boosted microwave absorption performance

Nano Research, Journal Year: 2022, Volume and Issue: 15(9), P. 7778 - 7787

Published: July 8, 2022

Language: Английский

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Excellent microwave absorption performance of LaFeO3/Fe3O4/C perovskite composites with optimized structure and impedance matching

Carbon, Journal Year: 2023, Volume and Issue: 213, P. 118200 - 118200

Published: June 7, 2023

Language: Английский

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MOF-derived Ni-Co bimetal/porous carbon composites as electromagnetic wave absorber

Advanced Composites and Hybrid Materials, Journal Year: 2022, Volume and Issue: 6(1)

Published: Dec. 29, 2022

Language: Английский

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Liquid‐Metal‐Assisted Programmed Galvanic Engineering of Core–shell Nanohybrids for Microwave Absorption

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(34)

Published: May 17, 2023

Abstract Core–shell nanostructures have received widespread attention because of their potential usage in various technological and scientific fields. However, they still face significant challenges terms fabrication core–shell nanostructure libraries on a controlled, even programmed scale. This study proposes general approach to systematically fabricate nanohybrids using liquid‐metal Ga alloys as reconfigurable templates, the initiation local galvanic replacement reaction is demonstrated utilizing an ultrasonic system. Under agitation, hydrated gallium oxides generated liquid metal droplets, simultaneously delaminated themselves from interfaces. Subsequently, single‐metal or bimetallic components are deposited fresh smooth Ga‐based via reactions form unique metal/metal nanohybrids. Controlled quantitative regulation diversity non‐homogeneous nanoparticle shell layer composition achieved. The obtained used efficient microwave absorbers dissipate unwanted electromagnetic wave pollution. effective absorption bands (90% absorption) GaNi GaCoNi 3.92 3.8 GHz at thickness 1.4 mm, respectively. advanced strategy enables growth other sulfides by spontaneous interfacial redox for functional materials future.

Language: Английский

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Advancements in Microwave Absorption Motivated by Interdisciplinary Research

Advanced Materials, Journal Year: 2023, Volume and Issue: 36(4)

Published: Oct. 23, 2023

Abstract Microwave absorption materials (MAMs) are originally developed for military purposes, but have since evolved into versatile with promising applications in modern technologies, including household use. Despite significant progress bench‐side research over the past decade, MAMs remain limited their scope and yet to be widely adopted. This review explores history of from first‐generation coatings second‐generation functional absorbers, identifies bottlenecks hindering maturation. It also presents potential solutions such as exploring broader spatial scales, advanced characterization, introducing liquid media, utilizing novel toolbox (machine learning, ML), proximity lab end‐user. Additionally, it meticulously compelling medicine, mechanics, energy, optics, sensing, which go beyond efficiency, along current development status prospects. interdisciplinary direction differs previous primarily focused on meeting traditional requirements (i.e., thin, lightweight, wide, strong), can defined next generation smart absorbers. Ultimately, effective utilization ubiquitous electromagnetic (EM) waves, aided by third‐generation MAMs, should better aligned future expectations.

Language: Английский

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Construction of Self-Assembly Based Tunable Absorber: Lightweight, Hydrophobic and Self-Cleaning Properties

Nano-Micro Letters, Journal Year: 2023, Volume and Issue: 15(1)

Published: May 28, 2023

Although multifunctional aerogels are expected to be used in applications such as portable electronic devices, it is still a great challenge confer multifunctionality while maintaining their inherent microstructure. Herein, simple method proposed prepare NiCo/C with excellent electromagnetic wave absorption properties, superhydrophobicity, and self-cleaning by water-induced NiCo-MOF self-assembly. Specifically, the impedance matching of three-dimensional (3D) structure interfacial polarization provided CoNi/C well defect-induced dipole primary contributors broadband absorption. As result, prepared have width 6.22 GHz at 1.9 mm. Due presence hydrophobic functional groups, improve stability humid environments obtain hydrophobicity large contact angles > 140°. This aerogel has promising absorption, resistance water or environments.

Language: Английский

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Morphology control of eco-friendly chitosan-derived carbon aerogels for efficient microwave absorption at thin thickness and thermal stealth

Green Chemistry, Journal Year: 2022, Volume and Issue: 24(13), P. 5280 - 5290

Published: Jan. 1, 2022

In the face of increasingly severe electromagnetic wave pollution, research biomass-based carbon materials due to advantages being green, renewable, environment-friendly, porous and light has become one most attractive topics.

Language: Английский

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Electrospinning of hierarchical carbon fibers with multi-dimensional magnetic configurations toward prominent microwave absorption

Carbon, Journal Year: 2022, Volume and Issue: 202, P. 244 - 253

Published: Nov. 1, 2022

Language: Английский

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Constructing mixed-dimensional lightweight flexible carbon foam/carbon nanotubes-based heterostructures: An effective strategy to achieve tunable and boosted microwave absorption

Carbon, Journal Year: 2023, Volume and Issue: 206, P. 364 - 374

Published: Feb. 25, 2023

Language: Английский

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