利用水热还原法在石墨烯(RGO)表面负载磁性金属Ni粒子,通过XRD、FT-IR、拉曼、SEM对其物相、形貌等进行表征分析。结果表明,通过水热原位还原法,直径约100nm的Ni粒子被均匀负载到RGO表面,成功制备了镍负载石墨烯(Ni/RGO)复合材料。利用矢量网络分析仪对其吸波性能进行检测,结果表明,样品1(0.25mmolNi负载RGO)表现出了优异的吸波性能,在吸波涂层厚度为4.5mm,吸波频率为7.2GHz时,最佳反射损耗为-55.9dB,其有效吸波宽度为5.8～9.2GHz。Ni/RGO复合材料是一种很有前途的具有低密度、强吸收、宽频带、厚度薄的微波吸收材料。
Ni nanoparticles anchored on the reduced graphene oxide (RGO) composite were prepared by the hydrothermal in-situ reduction method.The phase and morphology of Ni/RGO composite were analyzed by X-ray diffraction (XRD),Fourier transform infrared spectrometer (FT-IR),Raman spectroscopy and scanning electron microscopy (SEM).The results showed that Ni nanoparticles with the diameter of 100nm were uniformly wrapped by RGO,The electromagnetic wave absorption property of RGO and Ni/RGO composites were investigated by the vector network analyzer.The sample 1(0.25mmol Ni load graphene) showed an excellent wave absorbing property.The best reflection loss was -55.9dB at 7.2GHz and the corresponding thickness is 4.5mm and the effective absorption bandwidth was 5.8 to 9.2GHz.Ni/RGO may be a promising microwave absorber with the characteristics of the low density,strong absorption,wide band and thin thickness.
[1] Chandrasekaran S,Ramanathan S,Basak T.Microwave material processing—a review[J].Aiche Journal,2012,58(2):330-363.
[2] Tong Guoxiu,Liu Fangting,Wu Wenhua,et al.Rambutan-like Ni/MWCNT heterostructures:easy synthesis,formation mechanism,and controlled static magnetic and microwave electromagnetic characteristics[J].Journal of Materials Chemistry A,2014,2(20):7373-7382.
[3] Novoselov K S,Geim A K,Morozov S V,et al.Two-dimensional gas of massless dirac fermions in graphene[J].Nature,2005,438(7035):197-200.
[4] Novoselov K S,Geim A K,Morozov S V,et al.Electric field effect in atomically thin carbon films[J].Science,2004,306(5696):666-669.
[5] Vivekchand S R C,Rout C S,Subrahmanyam K S,et al.Graphene-based electrochemical supercapacitors[J].Journal of Chemistry Science,2008,120(1):9-13.
[6] Stoller M D,Park S,Zhu Y,et al.Graphene-based ultracapacitors[J].Nano Letters,2008,8(10):3498-3502.
[7] Guo Junling,Wang Xiaoling,Miao Penglong,et al.One-step seeding growth of controllable Ag@Ni core-shell nanoparticles on skin collagen fiber with introduction of plant tannin and their application in high-performance microwave absorption[J].Journal of Materials Chemistry,2012,22(24):11933-11942.
[8] Chen Tingting,Deng Fang,Zhu Jia,et al.Hexagonal and cubic Ni nanocrystals grown on graphene:phase-controlled synthesis,characterization and their enhanced microwave absorption properties[J].Journal of Materials Chemistry,2012,22(30):15190-15197.
[9] Zhu Zetao,Sun Xin,Li Guoxian,et al.Microwave-assisted synthesis of grapheme-Ni composites with enhanced microwave absorption properties in Ku-band[J].Journal of Magnetism and Magnetic Materials,2015,377:95-103.
[10] Zhu Zetao,Sun Xin,Xue Hairong,et al.Graphene-carbonyl iron cross-linked composites with excellent electromagnetic wave absorption properties[J].Journal of Materials Chemistry C,2014,32(2):6582-6591.
[11] Sun Xin,He Jianping,Li Guoxian,et al.Laminated magnetic graphene with enhanced electromagnetic wave absorption properties[J].Journal of Materials Chemistry C,2013,1(4):765-777.
[12] Yan De,Cheng Shuang,Zhuo Renfu,et al.Nanoparticles and 3D sponge-like porous networks of manganese oxides and their microwave absorption properties[J].Nanotechnology,2009,20(10):105706.
[13] Sun Genban,Dong Bingxiang,Cao Minhua,et al.Hierarchical dendrite-like magnetic materials of Fe3O4,γ-Fe2O3,and Fe with high performance of microwave absorption[J].Chemistry of Materials,2011,23(6):1587-1593.
[14] Zhao Biao,Shao Gang,Fan Bingbing,et al.Facile synthesis of crumpled ZnS net-wrapped Ni walnut spheres with enhanced microwave absorption properties[J].RSC Advances,2015(5):9806-9814.
[15] Wang Zhijiang,Wu Lina,Zhou Jigang,et al.Magnetite nanocrystals on multiwalled carbon nanotubes as a synergistic microwave absorber[J].Journal of Physical Chemistry C,2013,117(10):5446-5452.
[16]1 Zhao Biao,Shao Gang,Fan Bingbing,et al.Synthesis of flower-like CuS hollow microspheres based on nanoflakes self-assembly and their microwave absorption properties[J].Journal of Materials Chemistry A,2015,3(19):10345-10352.
PDF
(4211KB)
