Materials and Structures, Journal Year: 2024, Volume and Issue: 58(1)
Published: Dec. 13, 2024
Language: Английский
Carbon, Journal Year: 2024, Volume and Issue: 227, P. 119244 - 119244
Published: May 13, 2024
Electromagnetic waves constitute an essential element of societal progress, and the environmental impact resulting from using electromagnetic warrants significant considerations. Carbon materials have garnered considerable attention in functional domain owing to their remarkable electrical conductivity dielectric characteristics. Notably, spherical carbon materials, characterized by substantial specific surface area tunable properties, emerged as efficient additives for microwave absorbers. These excel absorbing energy while minimizing dissipation. When incorporated into absorbers varying compositions, sizes, morphologies, these spheres facilitate synergistic operation multiple loss mechanisms, containing conductive loss, magnetic polarization loss. This concerted action significantly enhances wave absorption performance. paper offers a comprehensive review advancements sphere-based designed waves. It also furnishes intricate exposition methodologies employed preparation meticulous analysis The summarizes microstructural attributes mechanisms governing various sphere configurations, considering factors such composition, morphology, size, structure. In conclusion, this study forecasts potentials nanomaterials realm waves, along with assessment forthcoming research focal points conceivable challenges.
Language: Английский
Citations
49
Langmuir, Journal Year: 2024, Volume and Issue: 40(23), P. 12148 - 12158
Published: May 28, 2024
During the past decade, ever-increasing electromagnetic pollution has excited a global concern. A sustainable resource, facile experimental scenario, fascinating reflection loss (RL), and broad efficient bandwidth are substantial factors that intrigue researchers. This research led to achievement of brilliant microwave-absorbing material by treating pampas as biomass. The carbon-based microfibers attained biowaste were treated plasma under diverse environments amplify their features. Moreover, pyrolysis scenario was performed compare results. reductive processes H2 carbonization. However, CO2 regulate heteroatoms defects. Interestingly, polystyrene (PS) applied matrix. aromatic rings existing in absorbing medium establish electrostatic interactions, elevating interfacial polarization, physical characteristics PS augment practical applications final product. manipulated biomasses characterized Raman, X-ray diffraction, energy-dispersive spectroscopy, field emission scanning electron microscopy, diffuse spectroscopy analyses. Eventually, features estimated vector network analyzer. plasma-treated H2/Ar blended with gained maximum RL −90.65 dB at 8.79 GHz an (RL ≤ −10 dB) 4.24 thickness 3.20 mm; meanwhile, treatment 97.99 14.92 7.74 2.05 mm thickness. Particularly, biomass plasmolyzed Ar covered entire X Ku bands 2.10 mm. Notably, total shielding efficiencies bioinspired materials up ≈99%, desirable for applications.
Language: Английский
Citations
21
Nano Research, Journal Year: 2024, Volume and Issue: 17(8), P. 7290 - 7300
Published: June 1, 2024
Abstract High-temperature carbonized metal-organic frameworks (MOFs) derivatives have demonstrated their superiority for promising electromagnetic wave (EMW) absorbers, but they still suffer from limited EMW absorption capacity and narrow bandwidth. Considering the advantage of microstructure chemical composition regulation design absorber, hierarchical heterostructured MoS 2 /CoS -Co 3 O 4 @cabonized cotton fabric (CF) (MCC@CCF) is prepared by growing ZIF-67 MOFs onto CF surface, etching, carbonization. Aside dual loss mechanism magnetic-dielectric multicomponent MOFs, etching carbonization process can effectively introduce abundant micro-gap structure that result in better impedance matching stronger via internal reflection, doped heteroatoms (Mo, N, S) to supply additional dipolar polarization loss, numerous heterointerfaces among , CoS Co CCF produce promoted conduction interfacial loss. Thus, a minimal reflection −52.87 dB broadest effective bandwidth 6.88 GHz were achieved tunning sample thickness filler loading, showing excellent performances. This research great value guiding on based absorbing materials.
Language: Английский
Citations
20
Carbon, Journal Year: 2024, Volume and Issue: 229, P. 119477 - 119477
Published: July 22, 2024
Language: Английский
Citations
16
ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(25), P. 32713 - 32726
Published: June 11, 2024
Metal-organic frameworks (MOFs) have attracted attention due to their designable structures. However, recently reported MOF microwave-absorbing materials (MAMs) are dominated by powders. It remains a challenge design MOF/carbon nanotube (CNT) composite structures that combine the mechanical properties of self-supporting flexibility with excellent microwave absorption. This work involves hydrothermal approach grow Ni-MOF different microstructures in situ on CNT monofilament adjusting molar ratio nickel ions organic ligands. Subsequently, an ultraflexible Ni-MOF/CNT buckypaper (BP) is obtained directional gas pressure filtration technology. The BP porous skeleton and unique structure provide effective impedance matching. CNTs contribute conduction loss, cross-scale heterogeneous interface generated provides rich interfacial polarization complicates propagation path. All factors together give absorption capacity. minimum reflection losses BPs decorated granular-, hollow prism-, prism-shaped Ni-MOFs reach -50.8, -57.8, -43.3 dB, respectively. corresponding bandwidths 4.5, 6.3, 4.8 GHz, Furthermore, show remarkable as they can be wound hundreds times around glass rod diameter 4 mm without structural damage. presents new concept for creating self-supported MOF-based MAMs hierarchical interpenetrating structures, potential application advantages field flexible electronics.
Language: Английский
Citations
13
Soft Science, Journal Year: 2024, Volume and Issue: 4(4)
Published: Dec. 24, 2024
Microwaves are currently used in many fields, including the military, medical, and communication. However, ensuing electromagnetic radiation has seriously threatened human life. Therefore, design of high-performance microwave absorbing materials (MAMs) become an important development direction. Metal-organic frameworks (MOFs) regarded as a bright new star among MAMs with broad application prospects due to their advantages tunable structure, large specific surface area, high porosity, etc . This paper reviews research progress derived from MOFs recent years, preparation methods, properties absorption mechanisms. Finally, problems MOF-derived discussed.
Language: Английский
Citations
11
ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(31), P. 41596 - 41615
Published: July 27, 2024
MXene emerges as a premier candidate for electromagnetic shielding owing to its unique properties novel two-dimensional material. Its exceptional electrical conductivity, chemical reactivity, surface tunability, and facile processing render it highly suitable diverse applications. The research status of MXene-based materials is systematically discussed in this paper. First, the single-component material briefly introduced. Subsequently, composite structures constructed by with polymers, carbon derivatives, ferrites introduced detail. Furthermore, progress ternary quaternary further focused. Finally, application prospected. A deeper understanding MXene's facilitated paper, providing direction future development design materials.
Language: Английский
Citations
10
ACS Applied Nano Materials, Journal Year: 2025, Volume and Issue: 8(4), P. 1978 - 1990
Published: Jan. 21, 2025
Microwave absorbing materials (MAMs) play critical roles in electromagnetic interference (EMI) shielding, stealth technology, and wireless communication systems. This study introduces a bidirectionally grown hybrid aerogel microwave absorber comprising Mo4/3CTx MXene, graphene-augmented inorganic nanofibers (GAIN), poly(vinyl alcohol) (PVA). The resulting demonstrates anisotropic properties exceptional absorption efficiency relative to its weight thickness with dielectric relaxation serving as the primary loss mechanism. research highlights fabrication process of explores underlying mechanisms, emphasizing dipolar interactions polarization mechanisms. Experimental theoretical results reveal that interaction MXene within PVA matrix significantly enhances GHz range through multitude mechanisms architectural features working synergistically. Notably, an 2.1 mm only 5 vol % achieved outstanding effective bandwidth 4.2 minimum reflection −37 dB. nature structure plays pivotal role capabilities, while chemical between inclusions amplify dominance how careful design precise material selection can produce lightweight, high-performance minimal content, leveraging low dimensionality versatility maximize highlighting potential for electronic telecommunication
Language: Английский
Citations
1
Applied Materials Today, Journal Year: 2025, Volume and Issue: 43, P. 102647 - 102647
Published: Feb. 20, 2025
Language: Английский
Citations
1
FlatChem, Journal Year: 2024, Volume and Issue: 48, P. 100759 - 100759
Published: Oct. 10, 2024
Language: Английский
Citations
5