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

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...

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Bibliographic Details
Published in物理化学学报 Vol. 28; no. 11; pp. 2754 - 2760
Main Author 李松梅 王博 刘建华 于美 安军伟
Format Journal Article
LanguageChinese
Published 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 2012
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ISSN1000-6818
DOI10.3866/PKU.WHXB201208292

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Summary: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.
Bibliography:11-1892/06
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
ISSN:1000-6818
DOI:10.3866/PKU.WHXB201208292