Lightweight and high-efficiency absorbing materials equipped with tunable electromagnetic properties are the foremost important factors for driving applications of 5 G smart era and military stealth. Stimulated by the remarkable merits of heterogeneous interface engineering, a series of unique flower-like Co-based multiphases nanostructures were successfully synthesized through identical hydrothermal method, and subsequently anchored on the Ti₃C₂T_x nanosheets. The suitable metal ion modulation is feasible to regulate the components, heterogeneous interfaces and defects for tailoring the electromagnetic parameters and microwave absorption (MA) property. Notably, the permittivity decreases of CMOT (CoO/MCo₂O₄/Ti₃C₂T_x, M=Fe, Cu, Zn) composites proceed gradually in the order of Fe²⁺, Cu²⁺, Zn²⁺, while the MA performance with tunable absorption peak could be modulated subtly. The as-obtained CFOT-12 (10 wt%), CCOT-15(10 wt%) and CZOT-15 (15 wt%) exhibit excellent MA capacity with a minimum reflection loss (RL_min) of –41.06,–52.67, –52.52 dB and corresponding effective absorption bandwidth (EAB) of 3.68,4.48,3.92 GHz at 2.10, 1.90, 1.80 mm, respectively. This work expands a novel approach to construct multicomponent heterostructure for tuning the EM parameters and absorbing property, as well as realize the high efficient and light weight.

具有可调谐电磁特性的轻质高效吸波材料是推动5G智能时代和军事隐身应用的最重要因素。受异质界面工程显着优点的刺激，通过相同的水热方法成功合成了一系列独特的花状Co基多相纳米结构，并随后锚定在Ti ₃ C ₂ T _x纳米片上。合适的金属离子调制对于调节电磁参数和微波吸收（MA）特性的成分、异质界面和缺陷是可行的。值得注意的是，CMOT (CoO/MCo ₂ O ₄/Ti ₃ C ₂ T _x ^{, M=Fe, Cu, Zn) 复合材料按Fe 2+}、Cu ²⁺、Zn ²⁺的顺序逐渐发展，而吸收峰可调的MA性能可以得到微妙的调节。所获得的 CFOT-12 (10 wt%)、CCOT-15 (10 wt%) 和 CZOT-15 (15 wt%) 表现出优异的 MA 容量，最小反射损耗 (RL _min ) 为 –41.06,–52.67, –52.52 dB 和相应的有效吸收带宽 (EAB) 分别在 2.10、1.90、1.80 mm 处为 3.68、4.48、3.92 GHz。这项工作扩展了一种构建多组分异质结构的新方法，用于调整电磁参数和吸收特性，并实现高效和轻量化。