The brilliant electromagnetic wave (EMW) absorbers are urgent with the extensive attention of electromagnetic pollution. Herein, the binary Fe₃O₄/MoS₂ composites are successfully synthesized via a facile hydrothermal method, where the different morphologies of 3D MoS₂ nanoflowers decorated with the monodispersed Fe₃O₄ particles by tailoring the molar ratio of Fe₃O₄ to MoS₂. Moreover, we find that the dielectric/magnetic loss and good impedance matching have dramatically contributed to the enhanced EMW absorption ability for binary Fe₃O₄/MoS₂ composites compared to pristine Fe₃O₄ nanoparticles. Meanwhile, the effective absorption bandwidth (EAB, RL< -10 dB, > 90% absorption) of 6.1 GHz at thin thickness of 2.0 mm could be obtained while it exhibits the strongest minimum reflection loss (RL_min) of -64.0 dB with ultra-thin thickness of 1.7 mm. Noticeably, even for the low frequency of C (4-8 GHz) and X (8-12 GHz) bands, the 100% frequency occupy ratio can be realized while the RL intensity is still not severely deteriorated, which is superior than most of MoS₂-based absorbers that have been reported so far. Hence, it can be expected that the Fe₃O₄/MoS₂ composites in this work featured with strong absorption intensity, selectable wide bandwidth (especially for 100% coverage both for C and X bands) as well as ultra-thin thickness (EAB of 6.1 GHz at 2.0 mm) will ensure it an attractive EMW absorber.

灿烂的电磁波（EMW）吸收器迫切需要电磁污染的广泛关注。这里，二进制的Fe ₃ ö ₄ / MOS _2种复合物，成功地合成通过一个浅显的水热法，其中3D的MoS的不同形态_2个纳米花装饰的单分散的Fe ₃ ö _4个颗粒通过调整Fe的摩尔比₃ Ò ₄至MoS ₂。此外，我们发现介电/磁损耗和良好的阻抗匹配对增强二元Fe ₃ O _4的EMW吸收能力做出了巨大贡献。/ MoS ₂复合材料与原始Fe ₃ O ₄纳米颗粒相比。同时，在2.0mm的薄厚度下可获得6.1 GHz的有效吸收带宽（EAB，RL <-10 dB，> 90％吸收），而在超薄时它表现出最强的最小反射损耗（RL _min）为-64.0 dB。 -1.7毫米的薄厚度。值得注意的是，即使对于C（4-8 GHz）和X（8-12 GHz）频段的低频，也可以实现100％的频率占用率，而RL强度仍不会严重恶化，这比大多数硫化钼₂迄今已报道的基于吸收剂的吸收剂。因此，可以预期，这项工作中的Fe ₃ O ₄ / MoS ₂复合材料具有较强的吸收强度，可选的宽带宽（特别是对于C和X波段均100％覆盖）和超薄厚度（EAB）在2.0 mm时的6.1 GHz频率）将确保它是有吸引力的EMW吸收器。