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

IF 8.9 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Chinese Chemical Letters Pub Date : 2024-03-26 DOI:10.1016/j.cclet.2024.109835

Xuexia Lin , Yihui Zhou , Jiafu Hong , Xiaofeng Wei , Bin Liu , Chong-Chen Wang

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Abstract

Biomass absorbing materials have received increasing attention for electromagnetic wave (EMW) absorption 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 sorbifolia 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.

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轻松制备 ZIF-8/ZIF-67 衍生生物质碳复合材料，实现高效电磁波吸收

生物质吸波材料因其密度低、介电损耗高而日益受到电磁波（EMW）吸收场吸波材料的关注。然而，生物质电磁波吸收材料往往存在磁损耗和阻抗匹配不足的问题。在这项工作中，基于多组分微、纳米结构金属颗粒和山嵛菊壳衍生生物质多孔碳（BPC），制备了一种简便的 ZIF-8/ZIF-67 衍生生物质复合材料（CoZnO@BPC），用于高性能电磁波吸收。通过改变 Zn2+ 与 Co2+ 离子的质量比来调节 CoZnO@BPC 复合材料的介电损耗和/或磁损能力。在填充量为 20 wt% 的情况下，CoZnO@BPC 具有优异的电磁波吸收能力，在 15.84 GHz 频率下的最小反射损耗（RL）为 -50.2 dB，匹配厚度仅为 1.7 mm。通过调整 ZIFs 的质量比，有效吸收带宽（EAB）可达 5.92 GHz（从 12.08 GHz 到 18 GHz），而匹配厚度仅为 1.9 mm。这些结果为经济、高效地制备轻质、先进的微波吸收材料提供了新的思路。

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来源期刊

Chinese Chemical Letters 化学-化学综合

CiteScore

14.10

自引率

15.40%

发文量

8969

审稿时长

1.6 months

期刊介绍： Chinese Chemical Letters (CCL) (ISSN 1001-8417) was founded in July 1990. The journal publishes preliminary accounts in the whole field of chemistry, including inorganic chemistry, organic chemistry, analytical chemistry, physical chemistry, polymer chemistry, applied chemistry, etc.Chinese Chemical Letters does not accept articles previously published or scheduled to be published. To verify originality, your article may be checked by the originality detection service CrossCheck.