Citation: Yanan Liu, Xiaogang Su, Di Lan, Jiangyong Liu, Weihai Ma, Yaqing Liu. Bimetallic MOF-derived CoZn-C/MWCNTs composite for lightweight and wideband microwave absorption[J]. Acta Physico-Chimica Sinica, ;2026, 42(6): 100276. doi: 10.1016/j.actphy.2026.100276 shu

Bimetallic MOF-derived CoZn-C/MWCNTs composite for lightweight and wideband microwave absorption

Yanan Liu ¹ ,
Xiaogang Su ^1,, ,
Di Lan ² ,
Jiangyong Liu ¹ ,
Weihai Ma ^3,, ,
Yaqing Liu ^1,,

1.
Shanxi Key Laboratory of Functional Polymer Composite Material, College of Materials Science and Engineering, North University of China, Taiyuan 030051, Shanxi Province, China;
2.
School of Automotive Materials, Hubei University of Automotive Technology, Shiyan 442002, Hubei Province, China;
3.
China-Belarus "Belt and Road Initiative" Joint Laboratory on Electromagnetic Environmental Effects, The 33rd Research Institute of China Electronics Technology Group Corporation, Taiyuan 030032, Shanxi Province, China

Corresponding author: Xiaogang Su, Weihai Ma, Yaqing Liu,
Received Date: 13 February 2026
Revised Date: 2 March 2026
Accepted Date: 2 March 2026

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.
- Bimetallic MOF derivatives,
- Microwave absorption,
- Impedance matching,
- Carbon-based materials
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