Hierarchical porous molybdenum carbide synergic morphological engineering towards broad multi-band tunable microwave absorption  

作　　者：Tianbao Zhao Di Lan Zirui Jia Zhenguo Gao Guanglei Wu 

机构地区：[1]School of Materials Science and Engineering, Hubei University of Automotive Technology, Shiyan, 442002, China [2]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, China [3]College of Chemistry and Chemical Engineering, Qingdao University, Qingdao, 266071, China

出　　处：《Nano Research》2024年第11期9845-9856,共12页纳米研究（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(Nos.52377026 and 52301192);Taishan Scholars and Young Experts Program of Shandong Province(No.tsqn202103057);Postdoctoral Fellowship Program of CPSF under Grant Number(No.GZB20240327);Shandong Postdoctoral Science Foundation(No.SDCX-ZG-202400275);Qingdao Postdoctoral Application Research Project(No.QDBSH20240102023);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).

摘　　要：With the accelerating development of electronic technology, how to effectively eliminate electromagnetic radiation pollution has become a critical issue. Electromagnetic wave (EMW) absorption materials have an irreplaceable position in the field of military stealth as well as in the field of electromagnetic pollution control. In order to cope with the complicated electromagnetic environment, the design of multifunctional and multiband high-efficiency EMW absorbers remains a daunting challenge. In this work, a hierarchical porous molybdenum carbide matrix with a three-dimensional porous structure was designed by salt melt synthesis (SMS) strategy. Furthermore, the relationship between the structure and the impedance matching performance was explored by stepwise modification via ultrathin layered MoS_(2) nanoflakes. Analysis indicates that the extent of modification of hierarchical porous molybdenum carbide by MoS_(2) nanoflakes modulates the dielectric performance due to differences in morphology and the introduction of heterogeneous structures, along with a dramatic impact on the impedance matching performance. In particular, the prepared MS/MC/PNC-2 composite exhibits a reflection loss (RL) of -55.30 dB at 2.4 mm, and an ultra-broad effective absorption bandwidth (EAB) of 7.60 GHz is obtained at 2.0 mm. The coordination of structure and component enables the absorber to exhibit strong absorption, wide bandwidth, thin thickness, and multi-band absorption characteristics. Noticeably, the effective absorption performance in the broadband for X and Ku is also satisfying, as well as possessing moderate marine anti-corrosion performance. This study contributes to an in-depth understanding of the relationship between impedance matching and EMW absorber performance and provides a reference for the design of multifunctional, multiband microwave absorbing materials.

关 键 词：electromagnetic wave absorber impedance matching MULTIBAND Schottky barrier 

分 类 号：TB34[一般工业技术—材料科学与工程]