Hierarchical multi-interface Co1-xS/Co9S8@C hollow microsphere for enhancing dielectric polarization as an efficient microwave absorber

Carbon, Journal Year: 2024, Volume and Issue: 229, P. 119475 - 119475

Published: July 22, 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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Multiple Schottky Contacts Motivated via Defects to Tune the Response Ability of Electromagnetic Waves

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 5, 2025

Abstract Metal‐organic framework (MOF) derivatives employed as novel microwave‐absorbing materials (MAMs) have garnered significant attention due to their diverse in situ or ex coordinated components and the flexibility nano‐microstructure fabrication. A well‐designed heterointerface can provide an optimal balance between impedance high‐loss capability. However, precisely tuning semiconductor‐metal‐carbon heterostructures remains a huge challenge. Herein, multi‐component NiS/Co 3 S 4 /NiCo@CNTs/NC nanohybrid with hollow structure is elaborately fabricated using convenient solvothermal method followed by high‐temperature pyrolysis, forming unique heterostructure multiple Schottky contacts. This demonstrates remarkable reflection loss value of −75.9 dB at thickness 2.6 mm. The transcendent microwave absorption (MA) capacity primarily attributed intense polarization relaxation process superb impedance‐matching properties semiconductor/metal/carbon hybrid barriers. In addition, built‐in electric field established heterointerfaces increases electron transport capabilities. Notably, controllable introduction numerous defects into carbon layer intensifies interfacial effect nanohybrid. study offers innovative insights mechanisms development high‐performance MAMs.

Language: Английский

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Construction of iron manganese metal–organic framework-derived manganese ferrite/carbon-modified graphene composites toward broadband and efficient electromagnetic dissipation

International Journal of Minerals Metallurgy and Materials, Journal Year: 2025, Volume and Issue: 32(3), P. 546 - 555

Published: Feb. 1, 2025

Language: Английский

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MoS₂-Decorated Tubular Carbon Nanostructures with Enhanced Dielectric Loss for Boosting Microwave Absorption

ACS Applied Nano Materials, Journal Year: 2024, Volume and Issue: 7(14), P. 16075 - 16085

Published: July 5, 2024

The construction of hierarchical structures has been demonstrated to be an effective method for achieving high-performance microwave absorption. In this study, a flower-like MoS2 nanosheet-coated tubular carbon composite with average diameter approximately 560 nm was synthesized via straightforward ion-exchange and pyrolysis strategy. growth nanosheets, the presence heterojunction surfaces, hollow structure collectively enhance dielectric loss material, thereby optimizing absorption properties material. C@MoS2 nanocomposite demonstrates minimum reflection −66.8 dB bandwidth 4.8 GHz when thickness is only 1.6 mm. This work presents synergistic strategy design layered structures.

Language: Английский

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Integrated design of multifunctional lightweight magnetic cellulose-based aerogel with 1D/2D/3D hierarchical network for efficient microwave absorption

Composites Communications, Journal Year: 2024, Volume and Issue: 49, P. 101987 - 101987

Published: July 6, 2024

Language: Английский

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In Situ Growth of CoNi Alloy/N-Doped Hollow Carbon Foam for Electromagnetic Wave Absorption

ACS Applied Nano Materials, Journal Year: 2024, Volume and Issue: 7(16), P. 19427 - 19438

Published: July 31, 2024

To meet the demands for high-performance and cost-effective electromagnetic wave absorbers in practical applications, CoNi alloy/N-doped hollow carbon foam (CoNi/NCF) was synthesized using melamine as a precursor through hydrothermal reaction. By introduction of appropriate alloys to form uniform magnetic metal nanoparticles on surface NCF, absorption performance NCF can be adjusted. These formed rich heterogeneous interfaces with enhancing interface polarization loss composite material waves. The alloy increased conductivity materials, which conducive formation three-dimensional conductive network promoted conduction As metal, also brought losses increasing ways consume Additionally, doping N atoms dipole NCF. minimum reflection (RLmin) CoNi/NCF reached −47.35 dB, maximum effective bandwidth (EAB) 5.6 GHz (2.4 mm). effectively reduced radar cross-section (RCS) signal electric conductor layer. This study provides feasible strategy developing materials an efficient performance.

Language: Английский

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Heterointerface between Carbon Nano-Onions and Fluorinated Boron Nitride Nanostructures for Improved Microwave Absorption Properties

ACS Applied Materials & Interfaces, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 7, 2025

Carbon-based materials are considered to be promising candidates for lightweight microwave absorption (MAMs). However, single carbon-based cannot meet the requirements of wide effective bandwidth (EAB) and strong due missing magnetic loss. Combining with via rational design microstructures attends an way achieve high-performance absorption. In this study, core-shell carbon nano-onions@fluorinated boron nitrides (CNOs@F-BNNOs) nanocomposites N-C F-B bridging were obtained by a simple in situ pyrolytic polymerization as well hydrothermal fluorination strategy exhibited excellent properties. Furthermore, results indicate that addition F-BNNOs not only improves polarization loss optimizes impedance matching but also enhances effect, thereby improving electromagnetic wave performance (EWAP). Among these compositions, CNOs@F-BNNOs minimum reflection (RLmin) value -43.23 dB at 17.23 GHz, EAB 10.54 GHz thickness 2.80 mm. Additionally, have thermal conductivity. Therefore, work presents novel approach constructing lightweight, efficient,

Language: Английский

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Constructing Schottky contacts via vertical growth of SnS2 nanosheets on hollow microspheres for efficient microwave absorption

Journal of Material Science and Technology, Journal Year: 2025, Volume and Issue: unknown

Published: March 1, 2025

Language: Английский

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Anion Doping Synergistic Strategy Achieving Multi‐Interfaces and Modulated Dielectric Coupling for Efficient Electromagnetic Response

Small Methods, Journal Year: 2025, Volume and Issue: unknown

Published: April 9, 2025

Abstract Efficient microwave absorbers are needed to address the electromagnetic pollution caused by proliferation of new radio technologies and equipment. Excellent absorption performance can be achieved controlling dielectric constant. Heteroatom‐doped bimetallic materials promising wave (EMA) due their tunable structures low cost. In particular, presence anionic sites significantly affects constant electrical conductivity. Herein, a 1D carbon nanofiber material is prepared encapsulating FeCo nanoparticles in fiber cavity electrostatic spinning. Subsequently, tellurization, vulcanization, selenization processes carried out. FeTe 2 / CoTe @C exhibits stronger conductivity loss lower electronegativity Te. The clever configuration , C heterostructures obtained Te doping generates multi‐heterogeneous interfaces that facilitate charge migration enhance interfacial polarization, obtaining excellent EMA performance. /CoTe an optimum minimum reflection (RL min ) −51.1 dB with matching thickness 2.0 mm, effective bandwidth (EAB) reaches 4.2 GHz. Radar cross‐section (RCS) calculations show great potential for practical military stealth technology. This study offers novel guidance improving properties transition metal matrix composites via coordination modulation.

Language: Английский

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