物理化学学报 >> 2012, Vol. 28 >> Issue (11): 2754-2760.doi: 10.3866/PKU.WHXB201208292

材料物理化学 上一篇    下一篇

不同形貌镍纳米粒子-石墨烯复合材料的制备及微波吸收性能

李松梅, 王博, 刘建华, 于美, 安军伟   

  1. 北京航空航天大学材料科学与工程学院, 空天材料与服役教育部重点实验室, 北京 100191
  • 收稿日期:2012-07-02 修回日期:2012-08-27 发布日期:2012-10-17
  • 通讯作者: 李松梅 E-mail:songmei_li@buaa.edu.cn
  • 基金资助:

    航空科学基金(20110251003)资助项目

Synthesis and Microwave Absorption Properties of Nickel Nanoparticles-Graphene Composites with Different Morphologies

LI Song-Mei, WANG Bo, LIU Jian-Hua, YU Mei, AN Jun-Wei   

  1. Key Laboratory of Aerospace Materials and Performance,Ministry of Education, School of Materials Science and Engineering, Beihang University, Beijing 100191, P. R. China
  • Received:2012-07-02 Revised:2012-08-27 Published:2012-10-17
  • Supported by:

    The project was supported by the Aviation Science Foundation of China (20110251003).

摘要:

采用原位化学还原方法制备出了两种不同形貌的镍纳米粒子-石墨烯(Ni-GNs)复合材料, 并研究了形貌对复合材料电磁吸收性能的影响. 制备过程中通过改变反应物的加入顺序, 制备出球形和刺球形镍纳米粒子-石墨烯复合材料. 利用X射线衍射(XRD)仪、扫描电子显微镜(SEM)、透射电子显微镜(TEM)和矢量网络分析仪(VNA)对复合材料的形貌、结构和微波吸收性能进行了表征. 结果表明: 刺球形镍纳米粒子-石墨烯复合材料相比于球形镍纳米粒子-石墨烯复合材料具有优异的电磁吸收性能, 其原因是由于复合材料中刺球形镍纳米粒子独特的各向同性天线形貌引起的尖端放电效应. 因此利用简单的原位化学还原制备不同形貌镍纳米粒子-石墨烯复合材料的方法可以作为其他复合材料制备的总体路线.

关键词: 石墨烯, 镍, 纳米复合材料, 微波吸收, 原位化学还原方法

Abstract:

Nickel nanoparticles-graphene (Ni-GNs) composites with two different morphologies were successfully synthesized by in situ chemical reduction, and the morphology-dependent electromagnetic absorption properties of the composites was investigated. By changing the sequence of the reactants are added during preparation, spherical and spinous spherical nickel nanoparticle-graphene composites were obtained. The structure, morphology, and microwave absorption properties of the composites were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and vector network analysis (VNA). The results indicated that the spinous spherical nickel nanoparticle-graphene composites had better microwave absorption ability than the spherical nickel nanoparticle-graphene composites. This is due to the unique isotropic antenna morphology of the spinous spherical nickel nanoparticles in the composites, arising from the point discharge effect. This facile in situ chemical reduction method for the preparation of nickel nanoparticle-graphene composites to give different morphologies could be used for the preparation of other composites.

Key words: Graphene, Nickel, Nanocomposite, Microwave absorption, In-situ chemical reduction method

MSC2000: 

  • O641