Controlled synthesis of porous Fe3O4-decorated graphene with extraordinary electromagnetic wave absorption properties

被引：177

作者：

Sun, Danping ^{[1
]}

Zou, Quan ^{[1
]}

Qian, Guoqiang ^{[1
]}

Sun, Chen ^{[1
]}

Jiang, Wei ^{[1
]}

Li, Fengsheng ^{[1
]}

机构：

[1] Nanjing Univ Sci & Technol, Natl Special Superfine Powder Engn Res Ctr, Nanjing 210094, Jiangsu, Peoples R China

来源：

ACTA MATERIALIA | 2013年 / 61卷 / 15期

基金：

中国国家自然科学基金;

关键词：

Fe3O4; Composites; Microstructure; Electromagnetic wave absorption; EXFOLIATED GRAPHITE OXIDE; COMPLEX PERMITTIVITY; CORE/SHELL NANORODS; LITHIUM STORAGE; COMPOSITES; REDUCTION; NANOTUBES; DISPERSIONS; RESONANCE; DELIVERY;

D O I：

10.1016/j.actamat.2013.06.030

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Porous Fe3O4-decorated graphene (GN-Fe3O4) composites with different microstructures were successfully synthesized by a modified two-step method. The microstructure and morphology were confirmed by X-ray diffraction (XRD), transmission electron microscopy and scanning electron microscopy. XRD studies show that the products consist of highly crystallized Fe3O4 but disorderedly stacked GN sheets. Electron microscopy images reveal that Fe3O4 nanoparticles with different sizes and microstructures are uniformly coated on both sides of GN sheets, without large vacancies or apparent aggregation. Electromagnetic wave absorption properties of epoxy containing 30 wt.% GN-Fe3O4 composites were investigated at room temperature in the frequency range of 0.5-18 GHz. In particular, the porous, flower-like Fe3O4-decorated GN sample exhibits an enhanced dielectric loss due to the porous microstructure of Fe3O4. The multiple absorbing mechanisms attribute to the improved impedance matching which indicates the as-prepared porous GN-Fe3O4 composites could be a potential candidate for lightweight electromagnetic wave absorption materials. (C) 2013 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：5829 / 5834

页数：6

共 35 条

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