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ZIF‐67‐Derived Co@Carbon Polyhedra Anchored on Reduced Graphene Oxide with Multiple Attenuation Abilities for Full X‐ and Ku‐Band Microwave Absorption.

Authors :
Yang, Yingjie
Zhao, Xiaoning
Tao, Ye
Lin, Ya
Wang, Zhongqiang
Source :
Physica Status Solidi - Rapid Research Letters. Dec2024, Vol. 18 Issue 12, p1-9. 9p.
Publication Year :
2024

Abstract

High‐performance microwave absorption (MA) materials are attracting growing attention to solve the expanded electromagnetic interference problems. Herein, zeolitic imidazolate organic frameworks (MOF)‐67 (ZIF‐67) are grown in situ on the sheet of graphene oxide (GO) through the coordination of Co2+ with oxygen functional groups. Through carbonization in an inert atmosphere, Co@carbon polyhedra (Co@CP)‐decorated reduced GO composites (Co@CP‐rGO) with a large number of heterogeneous interfaces are successfully obtained. The composites demonstrate excellent MA performance. With a filler loading of 10 wt%, the optimal minimum reflection loss (RL) of the composite can reach −54.6 dB. More importantly, the composites with thickness of 3.5 and 2.5 mm show the effective absorption bandwidth (RL < −10 dB) of 4.75 GHz (8.18–12.93 GHz) and 6.56 GHz (11.44–18 GHz), fully covering the X‐ and Ku‐band. It is proposed that the synergistic effect of multiple dielectric loss, magnetic loss, reflections and scattering contributes to the high MA performance. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
18626254
Volume :
18
Issue :
12
Database :
Academic Search Index
Journal :
Physica Status Solidi - Rapid Research Letters
Publication Type :
Academic Journal
Accession number :
181275947
Full Text :
https://doi.org/10.1002/pssr.202400159