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Volume 30 Issue 3
Mar.  2023

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Yahui Wang, Minghui Zhang, Xuesong Deng, Zhigang Li, Zongsheng Chen, Jiaming Shi, Xijiang Han, and Yunchen Du, Reduced graphene oxide aerogel decorated with Mo2C nanoparticles toward multifunctional properties of hydrophobicity, thermal insulation and microwave absorption, Int. J. Miner. Metall. Mater., 30(2023), No. 3, pp. 536-547. https://doi.org/10.1007/s12613-022-2570-9
Cite this article as:
Yahui Wang, Minghui Zhang, Xuesong Deng, Zhigang Li, Zongsheng Chen, Jiaming Shi, Xijiang Han, and Yunchen Du, Reduced graphene oxide aerogel decorated with Mo2C nanoparticles toward multifunctional properties of hydrophobicity, thermal insulation and microwave absorption, Int. J. Miner. Metall. Mater., 30(2023), No. 3, pp. 536-547. https://doi.org/10.1007/s12613-022-2570-9
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研究论文

具有疏水、隔热和微波吸收性能的多功能Mo2C修饰的rGO气凝胶

  • 通讯作者:

    时家明    E-mail: shijiaming17@nudt.edu.cn

    杜耘辰    E-mail: yunchendu@hit.edu.cn

文章亮点

  • (1) 制备了具有三维多孔网状结构的Mo2C/rGO气凝胶复合材料,系统研究了Mo2C含量的变化对材料性能的影响。
  • (2) Mo2C/rGO气凝胶的三维交联网状结构和可变的化学成分使其表现出可调的疏水性和隔热性能。
  • (3)通过调控Mo2C含量,可以实现衰减能力和阻抗匹配之间的良好平衡,优化吸波性能。
  • 还原氧化石墨烯(rGO)气凝胶因其丰富的导电网络和复杂的内部微观结构,以及与其他电磁衰减组分的良好兼容性,可以用作高效微波吸收材料,以缓解日益严重的电磁污染问题。然而,rGO气凝胶损耗单一,无法在自由空间中产生匹配良好的特性阻抗,使得电磁波难以在材料内部发生有效衰减。本文旨在开发一种具有多功能特性的Mo2C修饰rGO气凝胶复合材料作为高效微波吸收材料。本文通过水热组装、冷冻干燥和高温热解过程,制备了Mo2C纳米颗粒修饰的rGO气凝胶复合材料,研究了组成变化对复合材料形貌、结构和性能的影响。结果表明,当Mo2C/rGO气凝胶质量填充为9%时,在7.3 GHz处最小反射损耗值可达到−63.3 dB,最大有效吸收带宽为5.1 GHz。优异吸波性能主要来自于Mo2C纳米颗粒带来的衰减能力和阻抗匹配之间的良好平衡,尽管相对复介电常数随着Mo2C负载的增加而逐渐减小导致介电损耗下降,但Mo2C优化了电磁波入射界面处的阻抗匹配特性。引入Mo2C纳米颗粒后,rGO气凝胶的疏水性和隔热性也得到了有效改善。本文中Mo2C纳米颗粒对多功能特性的积极影响增强了Mo2C/rGO气凝胶的环境适用性,使其成为多功能高性能微波吸收材料的候选材料。
  • Research Article

    Reduced graphene oxide aerogel decorated with Mo2C nanoparticles toward multifunctional properties of hydrophobicity, thermal insulation and microwave absorption

    + Author Affiliations
    • Reduced graphene oxide (rGO) aerogels are emerging as very attractive scaffolds for high-performance electromagnetic wave absorption materials (EWAMs) due to their intrinsic conductive networks and intricate interior microstructure, as well as good compatibility with other electromagnetic (EM) components. Herein, we realized the decoration of rGO aerogel with Mo2C nanoparticles by sequential hydrothermal assembly, freeze-drying, and high-temperature pyrolysis. Results show that Mo2C nanoparticle loading can be easily controlled by the ammonium molybdate to glucose molar ratio. The hydrophobicity and thermal insulation of the rGO aerogel are effectively improved upon the introduction of Mo2C nanoparticles, and more importantly, these nanoparticles regulate the EM properties of the rGO aerogel to a large extent. Although more Mo2C nanoparticles may decrease the overall attenuation ability of the rGO aerogel, they bring much better impedance matching. At a molar ratio of 1:1, a desirable balance between attenuation ability and impedance matching is observed. In this context, the Mo2C/rGO aerogel displays strong reflection loss and broad response bandwidth, even with a small applied thickness (1.7 mm) and low filler loading (9.0wt%). The positive effects of Mo2C nanoparticles on multifunctional properties may render Mo2C/rGO aerogels promising candidates for high-performance EWAMs under harsh conditions.
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    • Supplementary Information-s12613-022-2570-9.docx
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