Quaternary Nanocomposites Consisting of Graphene, Fe3O4@Fe Core@Shell, and ZnO Nanoparticles: Synthesis and Excellent Electromagnetic Absorption Properties
Quaternary Nanocomposites Consisting of Graphene, Fe3O4@Fe Core@Shell, and ZnO Nanoparticles: Synthesis and Excellent Electromagnetic Absorption Properties
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石墨烯、Fe3O4@Fe核@壳和ZnO纳米粒子组成的四元纳米复合材料：合成及其优异的电磁吸收性能
DOI：
10.1021/am3021697
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发表时间：
2012-12-01
影响因子：
9.5
通讯作者：
Ouyang, Qiu-Yun
中科院分区：
文献类型：
--
作者：
Ren, Yu-Lan;Wu, Hong-Yu;Ouyang, Qiu-Yun
本文首次成功合成了由石墨烯、Fe3O4@Fe核/壳纳米粒子和ZnO纳米粒子组成的季系纳米复合材料。透射电镜测量结果表明，Fe3O4@Fe核壳纳米粒子的直径约为18 nm， Fe3O4壳厚度约为5 nm， ZnO纳米粒子的直径在2 ~ 10 nm之间。测量的电磁参数表明，反射损耗小于20 dB的吸收带宽高达7.3 GHz，在该波段范围内衰减了99%以上的电磁波能量。此外，纳米复合材料在基体中的添加量仅为20%。因此，纳米复合材料具有轻量化、宽吸收频带等优异的电磁吸收性能。
This paper presents for the first time a successful synthesis of quaternary nanocomposites consisting of graphene, Fe3O4@Fe core/shell nanopariticles, and ZnO nanoparticles. Transmission electron microscopy measurements show that the diameter of the Fe3O4@Fe core/shell nanoparitcles is about 18 nm, the Fe3O4 shell's thickness is about 5 nm, and the diameter of ZnO nanoparticles is in range of 2-10 nm. The measured electromagnetic parameters show that the absorption bandwidth with reflection loss less than 20 dB is up to 7.3 GHz, and in the band range more than 99% of electromagnetic wave energy is attenuated. Moreover, the addition amount of the nanocomposites in the matrix is only 20 wt %. Therefore, the excellent electromagnetic absorption properties with lightweight and wide absorption frequency band are realized by the nanocomposites.