Abstract Electromagnetic wave (EMW) absorbing materials have an important application in people's living environment. EMW absorption properties are affected by the morphology of EMW absorbing materials. MoS2 is two-dimensional layered structure and complex shaped structures can be formed by different stacking between layers. Here, we prepared flower-shaped MoS2 nanoparticles and flake-shaped MoS2 nanoparticles by hydrothermal method, and investigated the EMW absorption performance of both samples. Flower-shaped MoS2 nanoparticles had a larger specific surface area than that of flake-shaped MoS2 nanoparticles, so that the flower-shaped MoS2 nanoparticles had a superior EMW absorption performance. It was found that the samples consisting of 30 wt% flower-shaped MoS2 nanoparticles in the wax matrix based composites exhibited an effective EMW absorption bandwidth of 7.6 GHz (10.32–17.92 GHz) with the thickness of 3.0 mm. The minimum RL value of −39.20 dB was observed at 17.60 GHz for the sample with a thickness of 2.4 mm. The present work has a significant potential for the development of EMW absorbing materials with single metal sulfide.

中文翻译：

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用于电磁波吸收的不同形貌的二硫化钼纳米粒子的一步合成

摘要 电磁波（EMW）吸波材料在人们的生活环境中有着重要的应用。EMW 吸收特性受 EMW 吸收材料的形态影响。MoS2 是二维层状结构，通过层间不同的堆叠可以形成复杂形状的结构。在这里，我们通过水热法制备了花状 MoS2 纳米颗粒和片状 MoS2 纳米颗粒，并研究了两种样品的 EMW 吸收性能。花状MoS2纳米粒子比片状MoS2纳米粒子具有更大的比表面积，因此花状MoS2纳米粒子具有优异的EMW吸收性能。结果表明，蜡基复合材料中含有 30 wt% 花形 MoS2 纳米颗粒的样品表现出 7.6 GHz (10.32-17.92 GHz) 的有效 EMW 吸收带宽，厚度为 3.0 mm。对于厚度为 2.4 mm 的样品，在 17.60 GHz 处观察到的最小 RL 值为 -39.20 dB。目前的工作对于开发具有单一金属硫化物的 EMW 吸收材料具有巨大的潜力。