Synthesis and microwave absorption enhancement of graphene@Fe 3O4@SiO2@NiO nanosheet hierarchical structures

Lei Wang, Ying Huang, Xu Sun, Haijian Huang, Panbo Liu, Meng Zong, Yan Wang

科研成果: 期刊稿件文章同行评审

417 引用 (Scopus)

摘要

Hierarchical structures of graphene@Fe3O4@SiO 2@NiO nanosheets were prepared by combining the versatile sol-gel process with a hydrothermal reaction. Graphene@Fe3O4 composites were first synthesized by the reduction reaction between FeCl 3 and diethylene glycol (DEG) in the presence of GO. Then, graphene@Fe3O4 was coated with SiO2 to obtain graphene@Fe3O4@SiO2. Finally, NiO nanosheets were grown perpendicularly on the surface of graphene@Fe3O 4@SiO2 and graphene@Fe3O4@SiO 2@NiO nanosheet hierarchical structures were formed. Moreover, the microwave absorption properties of both graphene@Fe3O4 and graphene@Fe3O4@SiO2@NiO nanosheets were investigated between 2 and 18 GHz microwave frequency bands. The electromagnetic data demonstrate that graphene@Fe3O4@SiO2@NiO nanosheet hierarchical structures exhibit significantly enhanced microwave absorption properties compared with graphene@Fe3O4, which probably originate from the unique hierarchical structure with a large surface area and high porosity.

源语言英语
页(从-至)3157-3164
页数8
期刊Nanoscale
6
6
DOI
出版状态已出版 - 21 3月 2014

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