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Exfoliation of poly(ethylene glycol)-intercalated graphite oxide composite in water without sonication
International Journal of Minerals, Metallurgy and Materials ( IF 4.8 ) Pub Date : 2020-06-10 , DOI: 10.1007/s12613-019-1932-4
Yang Hu , Chun-bao Sun , Jue Kou

A novel method for exfoliating graphite oxide (GrO) was implemented through the mass water absorption of a GrO—poly(ethylene glycol) (GrO—PEG) composite. The GrO—PEG composite was prepared by intercalating PEG into the lamellae of GrO, and the variation of the basal spacing was measured by X-ray diffraction analysis. The yield of graphene was measured with an ultraviolet—visible spectrophotometer, and the properties of graphene oxide (GO) were characterized by atomic force microscopy, transmission electron microscopy (TEM), Raman spectrometry, and Fourier transform infrared spectroscopy. Increasing intercalation time was found to improve the yield of GO, whereas increasing the PEG molecular weight had the opposite effect. The GO sheets produced from the intercalation-absorption-exfoliation process were found to be a four-layer structure. TEM and Raman analyses indicate that the graphitized structure and oxygen groups of GO were preserved during the exfoliation process. Most importantly, the results show that good-quality GO could be prepared via a mild method involving water absorption of a GrO—PEG composite.



中文翻译:

无需超声处理的水中聚(乙二醇)插层氧化石墨复合材料的剥离

通过大量吸收GrO-聚乙二醇(GrO-PEG)复合材料的吸水率,实现了一种新的剥落氧化石墨(GrO)的方法。通过将PEG嵌入GrO的薄片中来制备GrO-PEG复合材料,并通过X射线衍射分析测量基间距的变化。用紫外可见分光光度计测量石墨烯的产率,并通过原子力显微镜,透射电子显微镜(TEM),拉曼光谱和傅里叶变换红外光谱对氧化石墨烯(GO)的性质进行表征。发现增加插入时间可提高GO的产率,而增加PEG分子量则具有相反的效果。由插入-吸收-剥离过程产生的GO片材被发现是四层结构。TEM和拉曼分析表明,GO的石墨化结构和氧基在剥离过程中得以保留。最重要的是,结果表明可以通过温和的方法制备高质量的GO,该方法涉及GrO-PEG复合材料的吸水率。

更新日期:2020-06-10
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