物理化学学报2026，Vol.42Issue(6)：157-169,13.DOI:10.1016/j.actphy.2026.100276
双金属MOF衍生的CoZn-C/MWCNTs复合材料用于轻质宽带微波吸收
Bimetallic MOF-derived CoZn-C/MWCNTs composite for lightweight and wideband microwave absorption
摘要
Abstract
Achieving high-performance microwave absorbers characterized by wide bandwidth,robust absorption,lightweight properties,and thin profiles remains a critical challenge within modern radar stealth and electromagnetic compatibility domains.In this study,we introduce a straightforward and cost-effective strategy for fabricating lightweight and efficient microwave absorbers utilizing composites derived from bimetallic zeolitic imidazolate frameworks(ZIFs).A variety of ZIF-8@ZIF-67 precursors incorporating multi-walled carbon nanotubes(MWCNTs)were synthesized through a sequential wet-chemical process.These precursors underwent conversion into porous bimetallic MOF-derived CoZn-C/MWCNTs composites via subsequent pyrolysis.The composition,microstructure,and electromagnetic characteristics of the pyrolyzed materials were precisely regulated by varying the Co/Zn molar ratio within the precursors.Due to the synergistic magnetic and dielectric dissipations,the 3:1 Co/Zn composite exhibited the best attenuation constant and impedance matching among all synthesized samples.Thus,the optimized composite provided a significant effective absorption bandwidth of 5.29 GHz at a thickness of 1.9 mm,coupled with an outstanding minimum reflection loss of-23.78 dB at 2.0 mm,even with a minimal filler loading of 20 wt.％.The enhanced scattering suppression behavior was additionally verified through radar cross-section simulation.This research provides a novel viewpoint on the rational design of lightweight MOF-based composites for broadband electromagnetic wave absorption performance.关键词
双金属MOF衍生物/微波吸收/阻抗匹配/碳基材料Key words
Bimetallic MOF derivatives/Microwave absorption/Impedance matching/Carbon-based materials分类
化学化工引用本文复制引用
刘亚楠,苏晓岗,兰笛,刘江涌,马卫海,刘亚青..双金属MOF衍生的CoZn-C/MWCNTs复合材料用于轻质宽带微波吸收[J].物理化学学报,2026,42(6):157-169,13.基金项目
山西省1331工程高分子功能新材料重点创新团队、山西省新材料产业创新学科群、国家超级计算太原中心、山西省重点研发计划项目(202302040201007)、中国博士后科学基金(2024M764319)及陕西省人工结构功能材料与器件重点实验室基础研究基金(AFMD-KFJJ-23203)提供的资助支持. （202302040201007）
