To effectively utilize the unique properties of layered transition metal dichalcogenide and the attractive morphology of hierarchical flower for the attenuation of electromagnetic wave, herein, high-efficiency flower-like core@shell structure FeSe₂@MoSe₂ nanocomposites were firstly synthesized through a simple in situ hydrothermal reaction on the surfaces of Fe₃O₄ nanoparticles with the adequate amounts of Mo and Se sources. The obtained results indicated that the designed flower-like core@shell structure FeSe₂@MoSe₂ nanocomposites with the filler loadings of 30 wt% and 40 wt% presented the optimal reflection loss (RL_opt) value of −59.87 dB at 11 GHz with a matching thickness of 3.10 mm and −60.53 dB at 13.52 GHz with a matching thickness of 2.47 mm. And their corresponding effective frequency bandwidth (f_b) values were up to 10.0 GHz with a thickness of 3.66 mm and 6.00 GHz with a thickness of 2.12 mm, respectively. It was worth pointing out that the as-prepared flower-like FeSe₂@MoSe₂ nanocomposite with filler loading of 30 wt% could simultaneously present very extraordinary electromagnetic wave absorption capabilities and broad absorption bandwidth with the very thin matching thicknesses, which was desirable for high-efficient microwave absorbers. Therefore, a simple and effective strategy was proposed to produce flower-like core@shell structure MoSe₂-based nanocomposites, which could be applied as the very desirable candidates for high-performance microwave absorption materials.

为了有效利用层状过渡金属二硫属化物的独特性质和分层花的有吸引力的形态来衰减电磁波，本文首先通过简单的合成方法合成了高效的花状核@壳结构 FeSe ₂ @MoSe ₂纳米复合材料。 Fe ₃ O ₄纳米颗粒表面的原位水热反应与足够量的 Mo 和 Se 源。获得的结果表明，设计的花状核@壳结构 FeSe ₂ @MoSe ₂纳米复合材料，填料负载量为 30 wt% 和 40 wt%，呈现最佳反射损耗（RL _opt) 值在 11 GHz 时为 -59.87 dB，匹配厚度为 3.10 毫米，而在 13.52 GHz 时为 -60.53 dB，匹配厚度为 2.47 毫米。并且它们对应的有效频率带宽（f _b）值分别高达10.0 GHz，厚度为3.66 mm和6.00 GHz，厚度为2.12 mm。值得指出的是，所制备的填充量为 30 wt% 的花状 FeSe ₂ @MoSe ₂纳米复合材料可以同时呈现出非常出色的电磁波吸收能力和宽吸收带宽以及非常薄的匹配厚度，这是理想的高效微波吸收剂。因此，提出了一种简单有效的策略来生产花状核@壳结构的 MoSe₂基纳米复合材料，可作为高性能微波吸收材料的理想候选材料。