Self-Assembly MXene-rGO/CoNi Film with Massive Continuous Heterointerfaces and Enhanced Magnetic Coupling for Superior Microwave Absorber

Highlights The rGO/CoNi nanosheets embedded between the MXene layers can continue to serve as a conductive channel, ensuring carrier migration and proper conductive loss capability. Owing to the strong magnetic coupling between the magnetic FeCo alloy nanoparticles on the rGO substrate, the entire M...

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Bibliographic Details
Published in:Nano-micro letters Vol. 14; no. 1; pp. 73 - 14
Main Authors: Li, Xiao, Wu, Zhengchen, You, Wenbin, Yang, Liting, Che, Renchao
Format: Journal Article
Language:English
Published: Singapore Springer Nature Singapore 01.12.2022
Springer Nature B.V
Springer Singapore
SpringerOpen
Subjects:
Composite materials
Coupling
Dielectric strength
Electromagnetic shielding
Electron holography
Electrostatic shielding
Engineering
Ferrous alloys
Graphene
Intermetallic compounds
Magnetic shielding
Microwave absorbers
Microwave absorption
Microwave absorption and EMI shielding
MXene
MXenes
Nanoalloys
Nanoparticles
Nanoscale Science and Technology
Nanostructure
Nanotechnology
Nanotechnology and Microengineering
Permittivity
Self-assembly
Substrates
Synthesis
Two dimensional materials
Microwave absorption
Composite materials
Graphene
MXene
Electron holography
ISSN:2311-6706, 2150-5551, 2150-5551
Online Access:Get full text
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Summary:Highlights The rGO/CoNi nanosheets embedded between the MXene layers can continue to serve as a conductive channel, ensuring carrier migration and proper conductive loss capability. Owing to the strong magnetic coupling between the magnetic FeCo alloy nanoparticles on the rGO substrate, the entire MXene-rGO/CoNi film exhibits a strong magnetic loss capability. Self-assembly MXene-rGO/CoNi films hold excellent microwave absorption performance − 54.1 dB at 13.28 GHz. MXene, as a rising star of two-dimensional (2D) materials, has been widely applied in fields of microwave absorption and electromagnetic shielding to cope with the arrival of the 5G era. However, challenges arise due to the excessively high permittivity and the difficulty of surface modification of few-layered MXenes severely, which infect the microwave absorption performance. Herein, for the first time, a carefully designed and optimized electrostatic self-assembly strategy to fabricate magnetized MXene-rGO/CoNi film was reported. Inside the synthesized composite film, rGO nanosheets decorated with highly dispersed CoNi nanoparticles are interclacted into MXene layers, which effectively suppresses the originally self-restacked of MXene nanosheets, resulting in a reduction of high permittivity. In addition, owing to the strong magnetic coupling between the magnetic FeCo alloy nanoparticles on the rGO substrate, the entire MXene-rGO/CoNi film exhibits a strong magnetic loss capability. Moreover, the local dielectric polarized fields exist at the continuous hetero-interfaces between 2D MXene and rGO further improve the capacity of microwave loss. Hence, the synthesized composite film exhibits excellent microwave absorption property with a maximum reflection loss value of − 54.1 dB at 13.28 GHz. The electromagnetic synergy strategy is expected to guide future exploration of high-efficiency MXene-based microwave absorption materials.
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ISSN:2311-6706
2150-5551
2150-5551
DOI:10.1007/s40820-022-00811-x