In recent years, two-dimensional layered transition metal dichalcogenides-based multicomponent composites (MCCs) acting as electromagnetic wave (EMW) materials have received intensive investigations. However, the vulcanication of metal greatly hindered their enhancement of EMW absorption performances (EMWAPs). Herein, a combined metal-organic frameworks-derived and hydrothermal strategy was presented to produce yolk-shell structure (YSS) CoNi@Air@C@MoS₂ MCCs. The results showed that the thermal and hydrothermal treatments resulted in the generation of YSS and two-dimensional MoS₂ nanosheets, which maintained the original morphology of CoNi Prussian blue analogues. The protection of thick C layer well inhibited the vulcanization of inner CoNi alloy. The formed sheet-like MoS₂ further optimized impedance matching characteristics, which led to the satisfactory EMWAPs of CoNi@Air@C@MoS₂ MCCs. Furthermore, the EMWAPs could be further improved by optimizing the Ni:Co atom ratios CoNi@Air@C@MoS₂ MCCs, which stemmed from their boosted impedance matching performances, EMW attention and polarization loss abilities. The absorption bandwidth and reflection loss values for YSS CoNi@Air@C@MoS₂ MCCs are 8 GHz and -60.83 dB, which covered almost all C-Ku bands. In general, our research work provided a valid strategy to produce YSS magnetic CoNi@Air@C@MoS₂ MCCs with high efficiency, which well avoided the vulcanization of metal nanoparticles, made best of hollow engineering and atomic ratio optimization strategy to boost the comprehensive EMWAPs.

近年来，作为电磁波（EMW）材料的二维层状过渡金属二硫化物基多组分复合材料（MCC）受到了广泛的研究。然而，金属的硫化极大地阻碍了其电磁波吸收性能（EMWAP）的增强。在此，提出了一种组合的金属有机框架衍生和水热策略来生产蛋黄壳结构（YSS）CoNi@Air@C@MoS ₂ MCC。结果表明，热处理和水热处理导致生成YSS和二维MoS ₂ 纳米片，保持了CoNi普鲁士蓝类似物的原始形貌。厚C层的保护很好地抑制了内部CoNi合金的硫化。形成的片状MoS ₂ 进一步优化了阻抗匹配特性，从而使CoNi@Air@C@MoS ₂ MCCs获得了令人满意的EMWAP。此外，通过优化 Ni:Co 原子比 CoNi@Air@C@MoS ₂ MCC 可以进一步提高 EMWAP，这源于其增强的阻抗匹配性能、EMW 注意力和极化损耗能力。 YSS CoNi@Air@C@MoS ₂ MCC的吸收带宽和反射损耗值为8 GHz和-60.83 dB，几乎覆盖了所有C-Ku频段。总的来说，我们的研究工作为高效生产YSS磁性CoNi@Air@C@MoS ₂ MCC提供了有效的策略，很好地避免了金属纳米颗粒的硫化，充分利用了中空工程和原子比优化战略，推进综合EMWAP。