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张海琴,徐双双,陈元,肇研.钴纳米粒子改性石墨烯复合材料的电磁性能[J].稀有金属材料与工程(英文),2017,46(12):3785~3791.[Zhang Haiqin,Xu Shuangshuang,Chen Yuan and Zhao Yan.Electromagnetic properties of graphene composites modified with cobalt nanoparticles[J].Rare Metal Materials and Engineering,2017,46(12):3785~3791.]
Electromagnetic properties of graphene composites modified with cobalt nanoparticles
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Received:October 26, 2015  Revised:January 21, 2016
Key words: graphene  composites  cobalt  nanoparticles  electromagnetic properties
Foundation item:北京市科学技术委员会(D141100002414001)及航空基金(No.2013ZF51073)
Author NameAffiliation
Zhang Haiqin,Xu Shuangshuang,Chen Yuan and Zhao Yan  
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      In this paper, cobalt nanoparticles were deposited on the surface of graphene by electroless plating,first sensitization and then activation using stannous chloride and palladium chloride respectively. XRD and TEM results showed that the concentrations of cobalt precursor and reductant affected the structures and yield of cobalt crystals. Electromagnetic tests results showed that the increasing cobalt content and reduction of graphene both improved the conductivity of Co-RGO. Meanwhile, Co-RGO nanocomposites had excellent absorbing properties because of magnetic loss and dielectric loss by lots of interfaces. For instance, the bandwidth of reflection below -10dB for Co-RGO*1 during 1~18GHz was about 4GHz, and the reflection for Co-RGO*2 was below -23dB from 26.5 to 40 GHz.