Mixed-Dimensional Assembly Strategy to Construct Reduced Graphene Oxide/Carbon Foams Heterostructures for Microwave Absorption, Anti-Corrosion and Thermal Insulation

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

Published: June 17, 2024

Abstract Considering the serious electromagnetic wave (EMW) pollution problems and complex application condition, there is a pressing need to amalgamate multiple functionalities within single substance. However, effective integration of diverse functions into designed EMW absorption materials still faces huge challenges. Herein, reduced graphene oxide/carbon foams (RGO/CFs) with two-dimensional/three-dimensional (2D/3D) van der Waals (vdWs) heterostructures were meticulously engineered synthesized utilizing an efficient methodology involving freeze-drying, immersing absorption, secondary followed by carbonization treatment. Thanks their excellent linkage effect amplified dielectric loss optimized impedance matching, 2D/3D RGO/CFs vdWs demonstrated commendable performances, achieving broad bandwidth 6.2 GHz reflection − 50.58 dB low matching thicknesses. Furthermore, obtained also displayed significant radar stealth properties, good corrosion resistance performances as well outstanding thermal insulation capabilities, displaying great potential in variable environments. Accordingly, this work not only straightforward method for fabricating heterostructures, but outlined powerful mixed-dimensional assembly strategy engineering multifunctional protection, aerospace other conditions.

Language: Английский

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Recent progress in smart electromagnetic interference shielding materials

Journal of Material Science and Technology, Journal Year: 2024, Volume and Issue: 186, P. 256 - 271

Published: Jan. 25, 2024

Language: 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, Journal Year: 2024, Volume and Issue: 16(1)

Published: June 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.

Language: Английский

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Manipulating cellulose-based dual-network coordination for enhanced electromagnetic wave absorption in magnetic porous carbon nanocomposites

Composites Communications, Journal Year: 2024, Volume and Issue: 48, P. 101922 - 101922

Published: April 30, 2024

Language: Английский

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Enhancing electromagnetic wave absorption with core‐shell structured SiO₂@MXene@MoS₂ nanospheres

Carbon Energy, Journal Year: 2024, Volume and Issue: 6(8)

Published: Feb. 15, 2024

Abstract Material composition and structural design are important factors influencing the electromagnetic wave (EMW) absorption performance of materials. To alleviate impedance mismatch attributed to high dielectric constant Ti 3 C 2 T x MXene, we have successfully synthesized core‐shell structured SiO @MXene@MoS nanospheres. This architecture, comprising as core, MXene intermediate layer, MoS outer shell, is achieved through an electrostatic self‐assembly method combined with a hydrothermal process. complex structure not only provides variety loss mechanisms that effectively dissipate energy but also prevents self‐aggregation nanosheets. Notably, synergistic combination highly conductive enables suitable composites, ensuring optimal matching. Therefore, nanospheres exhibit excellent EMW performance, featuring remarkable minimum reflection (RL min ) −52.11 dB (2.4 mm). It noteworthy these achieve ultra‐wide effective bandwidth (EAB) 6.72 GHz. work novel approach for designing synthesizing high‐performance absorbers characterized by “wide strong loss.”

Language: Английский

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Enhanced electromagnetic wave absorption and mechanical performances of graphite nanosheet/PVDF foams via ice dissolution and normal pressure drying

Journal of Materials Chemistry C, Journal Year: 2024, Volume and Issue: 12(21), P. 7775 - 7783

Published: Jan. 1, 2024

An ice dissolution-normal pressure drying strategy based on graphite nanosheet was proposed to prepare porous PVDF foams, which own exceptional microwave absorption (RL max = −57.68 dB, EAB 6.86 GHz) and compression strength (300.9 kPa).

Language: Английский

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Construction of three-dimensional porous network Fe-rGO aerogels with monocrystal magnetic Fe3O4@C core-shell structure nanospheres for enhanced microwave absorption

Materials Today Physics, Journal Year: 2024, Volume and Issue: 42, P. 101383 - 101383

Published: March 1, 2024

Language: Английский

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Phase Engineering on MoS₂ to Realize Dielectric Gene Engineering for Enhancing Microwave Absorbing Performance

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(32)

Published: March 28, 2024

Abstract Polarization relaxation loss caused by defects and interfaces has become a fascinating electromagnetic wave (EMW) mechanism. However, the logical relationship between impedance matching various mechanisms requires further elucidation to facilitate more comprehensive in‐depth research. Herein, phase engineering on molybdenum disulfide (MoS 2 ) is proposed as main controller of permittivity, offering straightforward highly effective method for regulating permittivity. Through control engineering, small gradient, monotonic change permittivity across substantial area achieved, leading gradual transition material system from strong but mismatching weak EMW transparent phase. Thanks fundamental regulation characteristic attenuation capacity dielectric gene controlled combined with ingenious coordination sulfur vacancy‐induced polarization interfacial polarization, t‐60 harvests an absorption band 6.8 GHz minimum reflection −59.8 dB. This study effectively expands pool improves research logic mechanisms, valuable insights development advanced absorbing materials.

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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Regulating the electromagnetic balance of materials by electron transfer for enhanced electromagnetic wave absorption

Journal of Material Science and Technology, Journal Year: 2024, Volume and Issue: 195, P. 63 - 73

Published: Feb. 24, 2024

Language: Английский

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