MoS2 Nanoflowers Decorated with Fe3O4/Graphite Nanosheets for Controllable Electromagnetic Wave Absorption
MoS2 Nanoflowers Decorated with Fe3O4/Graphite Nanosheets for Controllable Electromagnetic Wave Absorption
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Fe3O4/石墨纳米片装饰的 MoS2 纳米花用于可控电磁波吸收
DOI：
10.1021/acsanm.0c03328
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发表时间：
2021-03-25
影响因子：
5.9
通讯作者：
Zhang, Peng
中科院分区：
文献类型：
--
作者：
Qin, Zhaohui;Wang, Chunyu;Zhang, Peng
花状 MoS2 涂层磁性 Fe3O4/石墨纳米片 (GNs) 球用于制备具有可控电磁 (EM) 吸波性能的 Fe3O4/GNs-MoS2 复合材料。 Fe3O4的不同粒径对Fe3O4/GNs-MoS2的形成起着重要作用。 Fe3O4/GNs-1-MoS2 具有电磁波吸收特性，在 3.3 mm 匹配厚度下，最小反射损耗 (RLmin) 值为 -46.67 dB； 2.1 mm 的匹配厚度可实现 4.56 GHz 的有效吸收带宽 (EAB)。同时，Fe3O4/GNs-2-MoS2表现出优异的电磁波吸收性能，2.1 mm处的RLmin为-55.96 dB； EAB 的频率为 4.00 GHz，厚度为 1.5 mm，厚度超薄。优异的电磁波吸收能力与Fe3O4/GNs-MoS2的不同形貌以及各种损耗机制和良好阻抗匹配之间的协同贡献有关。这项工作解释并证明了通过调节和控制不同微观结构增强电磁波吸收性能以增强复合材料的吸收强度并扩大其EAB的前景。这是一种用于制造可控电磁波吸收材料的有前途的方法。
Flower-like MoS2-coated magnetic Fe3O4/graphite nanosheet (GNs) spheres are used to prepare Fe3O4/GNs-MoS2 composites with controllable electromagnetic (EM) wave-absorbing properties. The different particle size of Fe3O4 plays an important role in the formation of Fe3O4/GNs-MoS2. Fe3O4/GNs-1-MoS2 exhibits EM wave absorption properties with a minimum reflection loss (RLmin) value of -46.67 dB at 3.3 mm matching thickness; an effective absorption bandwidth (EAB) of 4.56 GHz can be achieved with 2.1 mm matching thickness. Meanwhile, Fe3O4/GNs-2-MoS2 exhibits excellent EM wave absorption properties with an RLmin of -55.96 dB at 2.1 mm; the EAB is 4.00 GHz at 1.5 mm with ultra-thin thickness. The superior EM wave absorption ability is related to the different morphology of Fe3O4/GNs-MoS2 and the synergistic contribution between the various loss mechanisms and good impedance matching. This work explains and proves the prospect that the enhancement of EM wave absorption performance by different microstructures can be adjusted and controlled to enhance the absorption intensity of the composites and to expand their EAB. This is a promising method for manufacturing EM wave-absorbing materials with controllability.