Graphene-enhanced microwave absorption properties of Fe₃O₄/SiO₂ nanorods

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• 作者：Xiaofang Liu^a ; ^{liux05@buaa.edu.cn" class="auth_mail" title="E-mail the corresponding author} ; Yaxin Chen^a ; Chengcheng Hao^a ; Jinrui Ye^b ; Ronghai Yu^a ; Daqing Huang^c
• 关键词：A. Graphene ; A. Hybrid ; B. Electrical properties ; B. Magnetic properties
• 刊名：Composites Part A: Applied Science and Manufacturing
• 出版年：2016
• 出版时间：October 2016
• 年：2016
• 卷：89
• 期：Complete
• 页码：40-46
• 全文大小：2478 K

文摘

Fe₃O₄/SiO₂/graphene composite composed of Fe₃O₄/SiO₂ core–shell nanorods and graphene nanosheets were synthesized by a facile wet chemical method. Structure and morphology studies reveal that the Fe₃O₄/SiO₂ nanorods with porous structure and large aspect ratio are densely wrapped by the graphene nanosheets. By changing the graphene content, the electromagnetic properties of the Fe₃O₄/SiO₂/graphene composite can be well tuned. When the weight ratio of Fe₃O₄/SiO₂ to graphene reaches an appropriate value, excellent microwave absorption performance is achieved due to the large electromagnetic losses and good impedance matching. The Fe₃O₄/SiO₂/graphene composite with graphene content of 5 wt.% shows the minimum reflection loss of −27.1 dB at 12.2 GHz when the coating layer thickness is only 1.5 mm.