Facile preparation of ZIF-8/ZIF-67-derived biomass carbon composites for highly efficient electromagnetic wave absorption

Xuexia Lin ¹Yihui Zhou ²Jiafu Hong ³Xiaofeng Wei ⁴Bin Liu ⁴Chong-Chen Wang⁵

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作者信息

1. College of Chemical Engineering,Huaqiao University,Xiamen 361021,China
2. College of Chemical Engineering,Huaqiao University,Xiamen 361021,China;Beijing Key Laboratory of Functional Materials for Building Structure and Environment Remediation,Beijing University of Civil Engineering and Architecture,Beijing 100044,China
3. College of Chemical Engineering,Huaqiao University,Xiamen 361021,China;College of Materials Science and Engineering,Huaqiao University,Xiamen 361021,China
4. College of Materials Science and Engineering,Huaqiao University,Xiamen 361021,China
5. Beijing Key Laboratory of Functional Materials for Building Structure and Environment Remediation,Beijing University of Civil Engineering and Architecture,Beijing 100044,China
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Abstract

Biomass absorbing materials have received increasing attention for electromagnetic wave(EMW)absorp-tion field absorbing materials due to its low density and high dielectric loss.However,the biomass EMW absorbing materials often suffer from the insufficient magnetic loss and impedance matching.In this work,a facile ZIF-8/ZIF-67-derived biomass composites(CoZnO@BPC)was prepared for high-performance EMW absorption based on multi-component micro,nano structures metal particles and xanthoce sorbifo-lia bunge shells-derived biomass porous carbon(BPC).The dielectric loss and/or magnetic loss abilities of CoZnO@BPC composites were adjusted by changing the mass ratio of Zn2+to Co2+ions.Under the filled amount of 20 wt％,CoZnO@BPC exhibited excellent EMW absorption with the minimum reflection loss(RL)at 15.84 GHz is-50.2 dB,and the matching thickness is only 1.7 mm.By adjusting the ZIFs mass ratio,the effective absorption bandwidth(EAB)can be up to 5.92 GHz(from 12.08 GHz to 18 GHz),and the matching thickness is only 1.9 mm.The results provide a new insight for the economical and efficient preparation of lightweight and advanced microwave absorbing materials.

Key words

Biomass/Metal organic framework/EMW absorption/Dielectric loss/Magnetic loss

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出版年

2024

中国化学快报(英文版)

中国化学会

中国化学快报(英文版)

CSTPCD

影响因子：0.771

ISSN：1001-8417

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