Fu Chen, He Dawei, Wang Yongsheng, Zhao Xuan
Key Laboratory of Luminescence and Optical Information, Ministry of Education, Institute of Optoelectronic Technology, Beijing Jiaotong University Beijing 100044 China
RSC Adv. 2018 Apr 24;8(28):15358-15365. doi: 10.1039/c8ra01838c. eCollection 2018 Apr 23.
Porous FeO@C core/shell nanorods decorated with reduced graphene oxide (RGO) were fabricated through a facile one-pot method. The microwave absorption properties of the samples can be adjusted by the weight ratio of RGO. The addition of RGO not only effectively reduces the agglomeration of FeO@C, but also has a great effect on impedance matching and dielectric loss, resulting in enhanced microwave absorption abilities. The thickness corresponding to optimum reflection loss ( ) decreases as the weight ratio of RGO increases. For the FeO@C/RGO composite, a maximum value of -48.6 dB can be obtained at 13.9 GHz with a thickness of 3.0 mm, and the absorption bandwidth with below -10 dB is 7.1 GHz from 10.9 GHz to 18 GHz. These results demonstrate a facile method to prepare a highly efficient microwave absorption material with special microstructure.
通过一种简便的一锅法制备了用还原氧化石墨烯（RGO）修饰的多孔FeO@C核壳纳米棒。样品的微波吸收性能可通过RGO的重量比进行调节。RGO的加入不仅有效减少了FeO@C的团聚，而且对阻抗匹配和介电损耗有很大影响，从而提高了微波吸收能力。随着RGO重量比的增加，对应最佳反射损耗（ ）的厚度减小。对于FeO@C/RGO复合材料，在厚度为3.0 mm时，在13.9 GHz可获得-48.6 dB的最大 值，并且在10.9 GHz至18 GHz范围内，低于-10 dB的吸收带宽为7.1 GHz。这些结果证明了一种制备具有特殊微观结构的高效微波吸收材料的简便方法。
