基于锌/钴基双金属金属有机框架的具有高效电磁波吸收性能的多孔磁性碳钴铁合金@氧化锌@碳复合材料

Porous magnetic carbon CoFe alloys@ZnO@C composites based on Zn/Co-based bimetallic MOF with efficient electromagnetic wave absorption.

作者信息

Kong Mingyue, Liu Xuehua, Jia Zirui, Wang Bingbing, Wu Xiaomeng, Wu Guanglei

机构信息

Institute of Materials for Energy and Environment, State Key Laboratory of Bio-fibers and Eco-textiles, College of Materials Science and Engineering, Qingdao University, Qingdao 266071, PR China.

Institute of Materials for Energy and Environment, State Key Laboratory of Bio-fibers and Eco-textiles, College of Materials Science and Engineering, Qingdao University, Qingdao 266071, PR China; College of Chemistry and Chemical Engineering, Qingdao University, Shandong, Qingdao 266071, PR China; Weihai Innovation Institute, Qingdao University, Shandong 264200, PR China.

出版信息

J Colloid Interface Sci. 2021 Dec 15;604:39-51. doi: 10.1016/j.jcis.2021.07.003. Epub 2021 Jul 6.

DOI:10.1016/j.jcis.2021.07.003

PMID:34261018

Abstract

To obtain lightweight and efficient electromagnetic wave absorbing materials, FeO@ZnCo-MOF composites were prepared in this paper by in-situ growth method, and CoFe alloys@ZnO@C composites were obtained by subsequent annealing process. By varying the loading of FeO during the synthesis process, a series of composites were obtained. Among them, CoFe alloys@ZnO@C-0.1 has the best electromagnetic wave absorption performance, which can reach a reflection loss (RL) of -40.63 dB at a thickness of 2.2 mm, while the reflection loss is -44.13 dB at a thickness of 5.0 mm, and the maximum effective absorption bandwidth (EAB) is 5.84 GHz at a thickness of 2.4 mm. The excellent performance can be attributed to the synergistic effect of the dielectric and magnetic properties of the composites as well as the effective impedance matching properties. Thus, the CoFe alloys@ZnO@C composite is expected to be a lightweight and efficient material for electromagnetic wave absorption.

摘要

为了获得轻质高效的电磁波吸收材料，本文采用原位生长法制备了FeO@ZnCo-MOF复合材料，并通过后续退火工艺获得了CoFe合金@ZnO@C复合材料。通过改变合成过程中FeO的负载量，得到了一系列复合材料。其中，CoFe合金@ZnO@C-0.1具有最佳的电磁波吸收性能，在2.2 mm厚度时反射损耗（RL）可达-40.63 dB，在5.0 mm厚度时反射损耗为-44.13 dB，在2.4 mm厚度时最大有效吸收带宽（EAB）为5.84 GHz。优异的性能可归因于复合材料介电和磁性能的协同效应以及有效的阻抗匹配性能。因此，CoFe合金@ZnO@C复合材料有望成为一种轻质高效的电磁波吸收材料。