@article{Huang2026, 
author = {Bo Huang and Fang Ye and Jingwen Deng and Jingchao Wang and Chen Li and Yuchen Cao and Wenjing Zhang and Xiaomeng Fan},
title = {Cross-scale structural engineering of MOF-derived CoxNiy@C nanorods with controllable electromagnetic response behavior for broadband electromagnetic wave absorption},
year = {2026},
journal = {Journal of Advanced Ceramics},
volume = {15},
number = {2},
pages = {9221224},
keywords = {structure engineering, electromagnetic wave absorption, electromagnetic synergistic, metal−organic framework derivatives, CoxNiy@C nanorods},
url = {https://www.sciopen.com/article/10.26599/JAC.2025.9221224},
doi = {10.26599/JAC.2025.9221224},
abstract = {Metal‒organic framework (MOF) derivatives employed as electromagnetic wave (EMW) absorption materials have gained considerable attention because of their plentiful coordination components and diverse nanomicrostructures. However, achieving broadband EMW absorption solely through nanoscale structural design remains challenging. Herein, a cross-scale structural engineering strategy is proposed to address this limitation. At the nanomicroscale, MOF-derived CoxNiy@C nanorods were fabricated via a solvothermal and pyrolysis process. Systematic manipulation of the built-in electric field (BIEF) heterointerface achieved through adjusting the Co/Ni atomic ratio significantly promotes electron-directed migration, alters the spatial charge distribution, and ultimately enhances the polarization relaxation and magnetic resonance effects, resulting in superior EMW absorption performance (the effective absorption bandwidth of Co2Ni@C is 4.9 GHz at 1.75 mm). The geometric configuration of the electromagnetic metastructures was subsequently optimized via CST software. Through cross-scale structural design, the simulated gradient honeycomb structure metamaterial composed of Co2Ni@C achieves multiband compatibility, and the EAB reaches 38 GHz (covering 2–40 GHz) with a total thickness of 15 mm. This research elucidates the BIEF loss mechanism of MOF-derived CoxNiy@C composites by rationally controlling the Co/Ni atomic ratio and provides novel insights into the structural design of electromagnetic nanomaterials.}
}