Construction of CoO/Co9S8/NC composites with low-frequency and broadband electromagnetic wave absorption

Carbon, Journal Year: 2024, Volume and Issue: 228, P. 119338 - 119338

Published: June 13, 2024

Language: Английский

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Structural Engineering of Hierarchical Magnetic/Carbon Nanocomposites via In Situ Growth for High-Efficient Electromagnetic Wave Absorption

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

Published: April 15, 2024

Materials exhibiting high-performance electromagnetic wave absorption have garnered considerable scientific and technological attention, yet encounter significant challenges. Developing new materials innovative structural design concepts is crucial for expanding the application field of absorption. Particularly, hierarchical structure engineering has emerged as a promising approach to enhance physical chemical properties materials, providing immense potential creating versatile materials. Herein, an exceptional multi-dimensional was meticulously devised, unleashing full microwave attenuation capabilities through in situ growth, self-reduction, multi-heterogeneous interface integration. The features three-dimensional carbon framework, where magnetic nanoparticles grow on skeleton, necklace-like structure. Furthermore, nanosheets assemble within this framework. Enhanced impedance matching achieved by precisely adjusting component proportions, intelligent integration diverse interfaces bolstered dielectric polarization. obtain Fe

Language: Английский

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Designing Electronic Structures of Multiscale Helical Converters for Tailored Ultrabroad Electromagnetic Absorption

Nano-Micro Letters, Journal Year: 2024, Volume and Issue: 17(1)

Published: Sept. 26, 2024

Abstract Atomic-scale doping strategies and structure design play pivotal roles in tailoring the electronic physicochemical property of electromagnetic wave absorption (EMWA) materials. However, relationship between configuration (EM) loss mechanism has remained elusive. Herein, drawing inspiration from DNA transcription process, we report successful synthesis novel situ Mn/N co-doped helical carbon nanotubes with ultrabroad EMWA capability. Theoretical calculation EM simulation confirm that orbital coupling spin polarization Mn–N 4 –C configuration, along cross generated by structure, endow converters enhanced loss. As a result, HMC-8 demonstrates outstanding performance, achieving minimum reflection −63.13 dB at an ultralow thickness 1.29 mm. Through precise tuning graphite domain size, HMC-7 achieves effective bandwidth (EAB) 6.08 GHz 2.02 mm thickness. Furthermore, constructing macroscale gradient metamaterials enables ultrabroadband EAB 12.16 only 5.00 mm, maximum radar section reduction value reaching 36.4 m 2 . This innovative approach not advances understanding metal–nonmetal co-doping but also realizes broadband EMWA, thus contributing to development mechanisms applications.

Language: Английский

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Micro-helical Ni3Fe chain encapsulated in ultralight MXene/C aerogel to realize multi-functionality: Radar stealth, thermal insulation, fire resistance, and mechanical properties

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 492, P. 152248 - 152248

Published: May 14, 2024

Language: Английский

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Rail-like heterostructured porous carbon composites derived from vanadium metal-organic framework/butterfly wings for enhanced microwave absorption

Carbon, Journal Year: 2024, Volume and Issue: 221, P. 118930 - 118930

Published: Feb. 13, 2024

Language: Английский

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Simultaneous manipulation of constituent and structure toward MOFs-derived hollow Co3O4/Co/NC@MXene microspheres via pyrolysis strategy for high-performance microwave absorption

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 487, P. 150729 - 150729

Published: March 26, 2024

Language: Английский

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Integrated design of MOFs-derived 0D/1D/2D/3D hierarchical network for high-efficiency electromagnetic wave absorption

Carbon, Journal Year: 2024, Volume and Issue: 224, P. 119049 - 119049

Published: March 14, 2024

Language: Английский

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Combustion-Assisted construction of Defect-Enriched hierarchical carbon composites towards efficient Low-Frequency electromagnetic wave absorption

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 488, P. 150893 - 150893

Published: April 3, 2024

Language: Английский

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Tailoring electromagnetic responsiveness of Tremella-like multi-dimensional heterostructures through a self-decomposition strategy

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: unknown, P. 157121 - 157121

Published: Oct. 1, 2024

Language: Английский

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Enhanced Electromagnetic Energy Conversion in an Entropy‐driven Dual‐magnetic System for Superior Electromagnetic Wave Absorption

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

Published: Oct. 29, 2024

Abstract Thermochemical conversion is a highly effective method for upgrading organic solid wastes into high‐value materials, contributing to carbon neutrality and peak, emission goals. It also serves as pathway develop energy‐efficient electromagnetic wave absorbing (EMWA) materials. In this study, fish skin successfully in situ nitrify Prussian Blue Fe 3 N under external thermal driving condition, resulting high saturation magnetization utilized. The N@C demonstrates outstanding EMWA property, achieving minimum reflection loss of −71.3 dB. Furthermore, by introducing cellulose nanofiber, portion the iron nitride transformed carbide, C/Fe N@C. This composite exhibits enhanced properties owing wider local charge redistribution stronger electronic interactions, an absorption bandwidth ( EAB ) 6.64 GHz. Electromagnetic simulations first‐principles calculations further elucidate mechanism, maximum reduction value radar‐cross section reached 37.34 dB·m 2 . design multilayer gradient metamaterials demonstrated ultra‐broadband 11.78 paper presents efficient strategy atomic‐level biomass waste utilization prepare N, provides novel insights between metal nitrides carbides, offers promising direction development advanced

Language: Английский

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