Modulating magnetic interface layer on porous carbon heterostructures for efficient microwave absorption

作     者：Zirui Jia Lifu Sun Zhenguo Gao Di Lan 

作者机构：School of Materials Science and Engineering Hubei University of Automotive Technology Shiyan 442002 China College of Chemistry and Chemical Engineering Qingdao University Qingdao 266071 China School of Materials Science and Engineering Yingkou Institute of Technology Yingkou 115014 China 

出 版 物：《Nano Research》 (纳米研究（英文版）)

年 卷 期：2024年第17卷第11期

页      面：10099-10108页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：supported by the National Natural Science Foundation of China(No.52301192) Postdoctoral Fellowship Program of CPSF(No.GZB20240327) Shandong Postdoctoral Science Foundation(No.SDCX-ZG-202400275) Qingdao Postdoctoral Application Research Project(No.QDBSH20240102023) China Postdoctoral Foundation(No.2024M751563) Natural Science Foundation of Hubei province(No.2024AFB460) the Scientific Research Foundation for Ph.Ds,Hubei University of Automotive Technology(No.BK202304).Guiding Project of the State Key Laboratory of Materials Processing and Die & Mould Technology,Huazhong University of Science and Technology(No.P2021-023).The Outstanding Young Scientific & Technological Innovation Team Plan of Colleges and Universities in Hubei Province(No.T201518).The Independent Innovation Projects of the Hubei Longzhong Laboratory(No.2022ZZ-30) the Qingchuang Talents Induction Program of Shandong Higher Education Institution(Research and Innovation Team of Structural-Functional Polymer Composites) 

主　　题：microwave absorber porous carbon magnetic compounds interface layer 

摘      要：Modern communication systems call for high performance electromagnetic wave absorption materials capable of mitigating microwaves over a wide frequency band. The synergistic effect of structure and component regulation on the electromagnetic wave absorption capacity of materials is considered. In this paper, a new type of three-dimensional porous carbon matrix composite is reported utilizing a reasonable design of surface impedance matching. Specifically, a thin layer of densely arranged Fe-Cr oxide particles is deposited on the surface of porous carbon via thermal reduction to prepare the Fe-Cr-O@PC composites. The effect of Cr doping on the electromagnetic wave absorption performance of the composites and the underlying attenuation mechanism have been uncovered. Consequently, outstanding electromagnetic wave absorption performance has been achieved in the composite, primarily contributed by the enhanced dielectric loss upon Cr doping. Accordingly, an effective absorption bandwidth of 4.08 GHz is achieved at a thickness of 1.4 mm, with a minimum reflection loss value of −52.71 dB. This work not only provides inspiration for the development of novel absorbers with superior performance but also holds significant potential for further advancement and practical application.