Journal of Materials Chemistry C, Год журнала: 2024, Номер unknown
Опубликована: Янв. 1, 2024
The transition metal ion-doped CeO 2 produces abundant oxygen vacancies, leading to excellent MA performance and radar stealth effect.
Язык: Английский
Journal of Advanced Ceramics, Год журнала: 2023, Номер 12(8), С. 1562 - 1576
Опубликована: Май 24, 2023
Two-dimensional (2D) transition metal carbides (MXene) process attractive conductivity and abundant surface functional groups, providing immense potential in the field of electromagnetic wave (EMW) absorption. However, high spontaneous aggregation MXene suffer from limited EMW response. Inspired by dielectric-magnetic synergy effect, strategy decorating with magnetic elements is expected to solve this challenge. In work, zigzag-like Mo2TiC2 nanofiber (Mo-MXene NFs) cross-linked networks are fabricated using HF etching KOH shearing processes. Subsequently, Co-MOF derived CoNi LDH ultrathin nanosheets grown inside Mo-MXene NFs, N-doped carbon matrix anchored alloy nanoparticles formed pyrolysis firmly embedded NFs network. Benefiting synergistic effect highly dispersed small nanoparticles, a 3D conductive network assembled numerous hollow vesicles, dual heterogeneous interface, designed Mo-MXene/CoNi-NC heterostructure provides robust absorption ability reflection loss (RL) value -68.45 dB at matching thickness 4.38 mm. The performance can be attributed excellent dielectric losses, loss, impedance matching, multiple scattering triggered unique structure. This work puts up great developing advanced MXene-based devices.
Язык: Английский
Процитировано
112
ACS Nano, Год журнала: 2024, Номер 18(6), С. 5040 - 5050
Опубликована: Янв. 29, 2024
High entropy alloys (HEA) have garnered significant attention in electromagnetic wave (EMW) absorption due to their efficient synergism among multiple components and tunable electronic structures. However, high density limited chemical stability hinder progress as lightweight absorbers. Incorporating HEA with carbon offers a promising solution, but synthesizing stable HEA/carbon composite faces challenges the propensity for phase separation during conventional heat treatments. Moreover, EMW mechanisms HEAs may be different from established empirical models high-entropy effect. This underscores urgent need synthesize absorbers uncover intrinsic mechanisms. Herein, we successfully integrated quinary FeCoNiCuMn into honeycomb-like porous nanofiber (HCNF) using electrostatic spinning Joule-heating method. Leveraging inherent lattice distortion effects honeycomb structure, HCNF/HEA demonstrates outstanding properties at an ultralow filler loading of 2 wt %. It achieves minimum reflection loss −65.8 dB boasts maximum bandwidth up 7.68 GHz. study not only showcases effectiveness combining HCNF HEA, also potential synthesis developing HEA-based
Язык: Английский
Процитировано
75
Small, Год журнала: 2024, Номер 20(20)
Опубликована: Янв. 11, 2024
Abstract This study addresses the challenge of designing simple and environmentally friendly methods for preparation effective electromagnetic wave (EMW) absorbing materials with tailored microstructures multi‐component regulation. N, O doped walnut‐like porous carbon composite microspheres loaded FeCo nanoparticles (WPCM/Fe–Co) are synthesized through high‐temperature carbonization combined soap‐free emulsion polymerization hydrothermal methods, avoiding use toxic solvents complex conditions. The incorporation magnetic components enhances loss, complementing dielectric loss to optimize EMW attenuation. unique morphology further improves impedance matching. proportions Fe Co can be adjusted regulate material's reflection thickness, bandwidth, allowing fine‐tuning absorption performance. At a low filling ratio (16.7%), optimal WPCM/Fe–Co composites exhibit minimum ( RL min ) −48.34 dB (10.33 GHz, 3.0 mm) an overall bandwidth (EAB) covering entire C bands, X Ku bands. work introduces novel approach composition regulation presents green synthesis method absorbers high‐performance at loading.
Язык: Английский
Процитировано
44
Journal of Materials Chemistry C, Год журнала: 2024, Номер 12(21), С. 7775 - 7783
Опубликована: Янв. 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).
Язык: Английский
Процитировано
41
Advanced Science, Год журнала: 2024, Номер unknown
Опубликована: Июль 16, 2024
The excellent dielectric properties and tunable structural design of metal sulfides have attracted considerable interest in realizing electromagnetic wave (EMW) absorption. However, compared with traditional monometallic bimetallic that are extensively studied, the unique physical characteristics solid-solution-type response to EMW not been revealed yet. Herein, a method for preparing high-purity is proposed based on solid-phase situ exsolution different ions from hybrid precursors. Utilizing CoAl-LDH/MIL-88A composite as precursor, Fe
Язык: Английский
Процитировано
31
Sustainable materials and technologies, Год журнала: 2024, Номер 39, С. e00830 - e00830
Опубликована: Янв. 17, 2024
Язык: Английский
Процитировано
21
Carbon, Год журнала: 2025, Номер 235, С. 120076 - 120076
Опубликована: Фев. 1, 2025
Язык: Английский
Процитировано
15
Advanced Functional Materials, Год журнала: 2024, Номер unknown
Опубликована: Ноя. 12, 2024
Abstract Freeze casting is a solidification technique utilized in the fabrication of porous materials. However, freeze process quite complex, and significant challenges remain precisely controlling pore size shape structures. This study aims to investigate customization multifunctional electromagnetic wave (EMW) absorbers with 3D structures via casting. review initially presents fundamental principles underlying examines correlation between internal external factors during preparation porosity. The emerging trends constructing novel intricate macroscopic through are subsequently outlined. Furthermore, this focuses on composites various microstructures low‐dimensional building blocks, their EMW response properties. By regulating influencing mechanisms casting, absorption materials exhibit outstanding advantages such as property manipulation, controllable structure, high porosity, specific surface area, lightweight, flexibility. These features broaden applications shielding, mechanical property, radar stealth, thermal insulation fire prevention, flexible sensors, antifreeze ability, etc. In addition, we discuss prospects high‐performance using techniques.
Язык: Английский
Процитировано
17
Small, Год журнала: 2024, Номер 20(31)
Опубликована: Март 10, 2024
Abstract An emerging carbothermal shock method is an ultra‐convenient strategy for synthesizing high‐entropy alloys (HEAs), in which the intelligent combination of carbon support and HEAs can be serve as a decisive factor interpreting trade‐off relationship between conductive gene dielectric gene. However, feedback mechanism ordering degree on electromagnetic (EM) response 2–18 GHz has not been comprehensively demystified. Herein, while lignin‐based fiber paper (L‐CFP) support, L‐CFP/FeCoNiCuZn‐X with prepared by method. The reflection loss −82.6 dB thickness 1.31 mm achieved means pointing electron enrichment within L‐CFP/FeCoNiCuZn heterointerfaces verified theoretical calculations. Simultaneously, low‐frequency evolution high‐intensity broadband EM relies “sacrificing” construction polymorphic L‐CFP/semi‐disordered‐HEAs heterointerfaces. practicality complex environments given prominence to thermal conductivity, hydrophobicity, electrocatalytic property. This work great significance insightful analysis application wave absorption.
Язык: Английский
Процитировано
15
Journal of Alloys and Compounds, Год журнала: 2024, Номер 1001, С. 175030 - 175030
Опубликована: Май 29, 2024
Язык: Английский
Процитировано
10