Fabrication of nitrogen-doped reduced graphene oxide/tricobalt tetraoxide composite aerogels with high efficiency, broadband microwave absorption, and good compression recovery performance

Journal of Material Science and Technology, Год журнала: 2024, Номер 190, С. 106 - 116

Опубликована: Янв. 23, 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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Electrostatically fabricated heterostructure of interfacial-polarization-enhanced Fe3O4/C/MXene for ultra-wideband electromagnetic wave absorption

Journal of Colloid and Interface Science, Год журнала: 2024, Номер 662, С. 796 - 806

Опубликована: Фев. 18, 2024

Язык: Английский

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

Chemical Engineering Journal, Год журнала: 2024, Номер 488, С. 150893 - 150893

Опубликована: Апрель 3, 2024

Язык: Английский

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Scalable fabrication of lightweight carbon nanotube aerogel composites for full X-band electromagnetic wave absorption

Carbon, Год журнала: 2024, Номер 219, С. 118811 - 118811

Опубликована: Янв. 10, 2024

Язык: Английский

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Two-phase magnetic nanospheres with magnetic coupling effect encapsulated in porous carbon to achieve lightweight and efficient microwave absorbers

Journal of Colloid and Interface Science, Год журнала: 2024, Номер 671, С. 56 - 66

Опубликована: Май 22, 2024

Язык: Английский

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Fabrication of Micro‐Mesopores on Spiral Carbon Nanocoils and Simultaneous Doping with Oxygen to Expand Microwave Absorption Bandwidth

Advanced Functional Materials, Год журнала: 2024, Номер unknown

Опубликована: Авг. 6, 2024

Abstract The exceptional benefits of structural defects and doped atoms in carbon network regarding electromagnetic properties inspire the design advanced carbon‐based microwave absorption (MA) materials. However, excessive decline physical materials, especially their conductivity. Therefore, it is a great challenge to balance optimize conductive behavior for MA spiral nanocoil (CNC), with coexisting amorphous polycrystalline structures moderate conductivity, has significant but lacks pores atoms. Herein, parts relatively weak C─C bond energies are preferentially oxidized at 500 °C air atmosphere create combine O bodies CNCs. Furthermore, mechanism prioritizing formation doping over discovered. Benefiting from synergistic interplay dopants, O‐enriched porous CNCs demonstrate enhanced conduction polarization losses than pure CNCs, realizing wide effective bandwidth 7.3 GHz filling ratio only 3 wt.%. Theoretical calculations further support these experimental results. combination may serve as an pathway unlocking tunable dielectric

Язык: Английский

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Tunable 1D–2D Carbon Nanomaterials for Broadband and High-Performance Microwave Absorption via Ultrasonic Spray Ice Template

ACS Applied Materials & Interfaces, Год журнала: 2025, Номер unknown

Опубликована: Фев. 3, 2025

Polymer-based one- and two-dimensional (1D-2D) carbon nanomaterials are considered promising microwave-absorbing materials (MAMs) due to their high atomic utilization efficiency tunable microscopic/macroscopic morphology. The design of 1D-2D through a facile method meet the requirements advanced MAMs remains challenge. In this work, environmentally friendly processing ultrasonic spray ice template (USIT) is employed fabricate porous based on Kapton-type polyimide, which exhibit intriguing morphology both 1D nanowires 2D nanosheets. Under subsequent carbonization at 700 800 °C, obtained inherit original Furthermore, or nanomorphology can be readily controlled by adjusting concentration precursor solution. For samples fabricated with lower concentrations (0.1%), nanowire structures predominant. Interconnected conductive networks heterogeneous interfaces formed intertwining stacking nanowires, thereby enhancing conductivity loss. Additionally, abundant structure provides an effective channel for electromagnetic wave entrance, significantly improving impedance matching ability. results show that nanowire-dominated (700 °C carbonization) excellent microwave absorption performance. reflection loss minimum (RLmin) -67.2 dB 8.1 GHz 4.65 mm, maximum bandwidth (<-10 dB) 7.7 3.03 mm. Exemplified MAMs, USIT strategy has broad prospects, providing enormous potential various practical applications bridging gap between polymer precursors 1D/2D nanomaterials.

Язык: Английский

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Multifunctional Carbon Foam with Nanoscale Chiral Magnetic Heterostructures for Broadband Microwave Absorption in Low Frequency

Nano-Micro Letters, Год журнала: 2025, Номер 17(1)

Опубликована: Фев. 6, 2025

Abstract The construction of carbon nanocoil (CNC)-based chiral-dielectric-magnetic trinity composites is considered as a promising approach to achieve excellent low-frequency microwave absorption. However, it still challenging further enhance the low frequency absorption and elucidate related loss mechanisms. Herein, chiral CNCs are first synthesized on three-dimensional (3D) foam then combined with FeNi/NiFe 2 O 4 nanoparticles form novel foam. 3D porous CNC-carbon network provides impedance matching strong conduction loss. formation FeNi-carbon interfaces induces interfacial polarization loss, which confirmed by density functional theory calculations. Further permeability analysis micromagnetic simulation indicate that nanoscale magnetic heterostructures pinning coupling effects, anisotropy capability. Owing synergistic effect between dielectricity, chirality, magnetism, composite exhibits performance an ultrabroad effective bandwidth (EAB) 14 GHz minimum reflection less than − 50 dB. More importantly, C-band EAB extended GHz, achieving full coverage. This study guidelines for microstructure design broadband

Язык: Английский

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Achieving efficient electromagnetic absorption in multifunctional carbon nanotube aerogels by manipulating radialized network structure

Chemical Engineering Journal, Год журнала: 2024, Номер 498, С. 155629 - 155629

Опубликована: Сен. 12, 2024

Язык: Английский

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