Reduced Graphene Oxide-Wrapped Super Dense Fe3O4 Nanoparticles with Enhanced Electromagnetic Wave Absorption Properties

Nanomaterials

Yiyi Wang¹  Weicheng Nie¹  Jun Zhou²  Qi Yu³  Ping Chen³  Hanlin Chen⁴ 

[1] Liaoning Key Laboratory of Advanced Polymer Matrix Composites, Shenyang Aerospace University, Shenyang 110136, China;State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116024, China;;Faculty of Materials Science and Engineering &;School of Chemical Engineering &

关键词: RGO/Fe₃O₄ nanocomposite;    micromorphology;    electromagnetic characteristics;    microwave absorption properties;   

DOI  :  10.3390/nano9060845

来源: DOAJ

【 摘 要 】

The efficient preparation of electromagnetic wave absorbing materials with low density and excellent electromagnetic wave absorption remains a considerable challenge. In this study, reduced graphene oxide (RGO) wrapped Fe₃O₄ nanoparticles (NPs) were synthesized based on one-step reaction by the reduction of graphene oxide (GO), and the generation of super-fine Fe₃O₄ NPs was achieved. The phase structure, chemical composition, micromorphology, and magnetism were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscope (XPS), scanning electron microscope (SEM), transmission electron microscope (TEM), and vibrating sample magnetometer (VSM), respectively. The electromagnetic characteristics were evaluated on a vector network analyzer by the coaxial line method. The results showed that super-fine Fe₃O₄ NPs with an average size of 6.18 nm are densely distributed on the surface of graphenes. The RGO/Fe₃O₄ nanocomposites exhibited excellent microwave absorption properties with a minimum reflection loss (RL) of up to −55.71 dB at 6.78 GHz at 3.5 mm thickness and the highest effective absorption bandwidth with RL values exceeding −10 dB is 4.76 GHz between 13.24 and 18 GHz at 1.7 mm thickness. This work provides a concise method for the development of RGO supported super dense Fe₃O₄ nanocomposites for high performance electromagnetic absorption applications.

【 授权许可】

Unknown