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Multidimensional construction of 1T-MoS2@graphene nanosheets nanocomposites for enhanced electromagnetic wave absorption
Journal of Materials Science & Technology ( IF 11.2 ) Pub Date : 2024-09-12 , DOI: 10.1016/j.jmst.2024.08.034
Jia Zhao , Mukun He , Hua Guo , Yali Zhang , Hua Qiu , Haoran Lai

The preparation of electromagnetic (EM) wave absorption materials provided with the characteristics of thin matching thickness, broad bandwidth, and mighty absorption intensity is an efficient solution to current EM pollution. Herein, Graphene nanosheets (GN) were firstly fabricated via a facile high-energy ball milling method, subsequently high-purity 1T-MoS2 petals were uniformly anchored on the surface of GN to prepare 1T-MoS2@GN nanocomposites. Plentiful multiple reflection and scattering of EM waves in a distinctive multidimensional structure formed by GN and 1T-MoS2, copious polarization loss consisting of interfacial polarization loss and dipolar polarization loss severally derived from multitudinous heterointerfaces and profuse electric dipoles in 1T-MoS2@GN, and mighty conduction loss originated from plentiful induced current in 1T-MoS2@GN generated via the migration of massive electrons, all of which endowed 1T-MoS2@GN nanocomposites with exceptional EM wave absorption performances. The minimum reflection loss (RLmin) of 1T-MoS2@GN reached –50.14 dB at a thickness of only 2.10 mm, and the effective absorption bandwidth (EAB) was up to 6.72 GHz at an ultra-thin matching thickness of 1.84 mm. Moreover, the radar scattering cross section (RCS) reduction value of 36.18 dB m2 at 0° could be achieved as well, which ulteriorly validated the tremendous potential of 1T-MoS2@GN nanocomposites in practical applications.

中文翻译:


用于增强电磁波吸收的 1T-MoS2@graphene 纳米片纳米复合材料的多维构建



制备具有匹配厚度薄、带宽宽、吸收强度大等特点的电磁 (EM) 波吸收材料是解决当前电磁污染的有效方法。本文首先通过简单的高能球磨法制备了石墨烯纳米片 (GN),随后将高纯度的 1T-MoS2 花瓣均匀地锚定在 GN 表面,制备了 1T-MoS2@GN 纳米复合材料。电磁波在 GN 和 1T-MoS2 形成的独特多维结构中具有丰富的多重反射和散射,由 1T-MoS2@GN 中的多个异质界面和大量电偶极子分别衍生的界面极化损耗和偶极极化损耗组成的大量极化损耗,以及由大质量电子迁移产生的 1T-MoS2@GN 中大量感应电流产生的强大传导损耗, 所有这些都赋予了 1T-MoS2@GN 纳米复合材料卓越的电磁波吸收性能。1T-MoS2@GN 的最小反射损耗 (RLmin) 在厚度仅为 2.10 mm 时达到 –50.14 dB,在 1.84 mm 的超薄匹配厚度下,有效吸收带宽 (EAB) 高达 6.72 GHz。此外,在 0° 时雷达散射截面 (RCS) 的折减值为 36.18 dB m2,这最终验证了 1T-MoS2@GN 纳米复合材料在实际应用中的巨大潜力。
更新日期:2024-09-12
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