An efficientfficient, controllable and facile two-step synthesis strategy： Fe3O4@RGO composites with various Fe3O4 nanoparticles and their supercapacitance properties

• Published in: Nano research 2017-10, Vol.10 (10), p.3303-3313
• Main Authors: Lian, Chao, Wang, Zhuo, Lin, Rui, Wang, Dingsheng, Chen, Chen, Li, Yadong
• Format: Article
• Language: English
• Subjects: Atomic/Molecular Structure and Spectra; Biomedicine; Biotechnology; Capacitance; Chemistry and Materials Science; Condensed Matter Physics; Crystals; Electrochemical analysis; Electrochemistry; Electron microscopy; Graphene; Iron oxides; Materials Science; Nanocomposites; Nanocrystals; Nanoparticles; Nanotechnology; Raman spectroscopy; Research Article; Transmission electron microscopy; X-ray diffraction; 两步合成; 可控性; 四氧化三铁; 氧化石墨; 电容性能; 简便; 纳米Fe3O4; 纳米复合材料
• ISSN: 1998-0124; 1998-0000
• DOI: 10.1007/s12274-017-1543-8

An efficient, controllable, and facile two-step synthetic strategy to prepare graphene-based nanocomposites is proposed. A series of Fe3O4-decorated reduced graphene oxide （Fe3O4@RGO） nanocomposites incorporating Fe3O4 nanocrystals of various sizes were prepared by an ethanothermal method using graphene oxide （GO） and monodisperse Fe3O4 nanocrystals with diameters ranging from 4 to 10 nm. The morphologies and microstructures of the as-prepared composites were characterized by X-ray diffraction, Raman spectroscopy, nitrogen adsorption measurements, and transmission electron microscopy. The results show that GO can be reduced to graphene during the ethanothermal process, and that the Fe3O4 nanocrystals are well dispersed on the graphene sheets generated in the process. The analysis of the electrochemical properties of the Fe3O4@RGO materials shows that nanocomposites prepared with Fe3O4 nanocrystals of different sizes exhibit different electrochemical performances. Among all samples, FegO4@RGO prepared with Fe3O4 nanocrystals of 6 nm diameter possessed the highest specific capacitance of 481 F/g at 1 A/g, highlighting the excellent capability of this material. This work illustrates a promising route to develop graphene-based nanocomposite materials with a wide range of potential applications.