Facile preparation and excellent microwave absorption properties of an RGO/Co0.33Ni0.67 lightweight absorber

被引:20
|
作者
Pan, Hai [1 ]
Xu, Mingzhen [1 ]
Qi, Qing [1 ]
Liu, Xiaobo [1 ]
机构
[1] Univ Elect Sci & Technol China, Sch Microelect & Solid State Elect, High Temp Resistant Polymers & Composites Key Lab, Res Branch Adv Funct Mat, Chengdu 610054, Sichuan, Peoples R China
关键词
ENHANCED WAVE ABSORPTION; REDUCED GRAPHENE OXIDE; NANOCOMPOSITES; FABRICATION; MICROSPHERES; COMPOSITES;
D O I
10.1039/c7ra06849b
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Novel microwave absorbers combining Co0.33Ni0.67 alloy and reduced graphene oxide (RGO) are fabricated and their excellent microwave absorption properties demonstrated. Co0.33Ni0.67 alloy particles are prepared by a one-pot solvent-thermal method from CoCl2 center dot 6H(2)O and NiCl2 center dot 6H(2)O. The prepared Co0.33Ni0.67 alloy particles are confirmed from SEM observation, EDS analysis and XRD measurements. RGO/Co0.33Ni0.67 composites are then fabricated by adding the Co0.33Ni0.67 alloy particles into a colloidal dispersion of GO and thermally reducing at 210 degrees C. The composition of RGO/Co0.33Ni0.67 is characterized by Raman, XPS, VSM, XRD and FTIR measurements. An SEM micrograph indicates the sandwich-like structure of RGO/Co0.33Ni0.67 with Co0.33Ni0.67 alloy particles intercalated into the RGO sheets. By suitably adjusting the dielectric loss and magnetic loss derived from different contents of the RGO and Co0.33Ni0.67, an RGO/Co0.33Ni0.67 composite with excellent microwave absorption properties is obtained. The maximum reflection loss is up to -50 dB at a thickness of only 1.8 mm. In addition, the absorption bandwidth exceeding -10 dB reaches up to 14.0 GHz with matching thicknesses of 5.0-1.4 mm and covers the whole Ku band at a thickness of only 2.0 mm.
引用
收藏
页码:43831 / 43838
页数:8
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