Effects of oxidation on the defect of reduced graphene oxides in graphene preparation

Yang Hu; Shaoxian Song; Alejandro Lopez-Valdivieso

doi:10.1016/j.jcis.2015.02.059

Effects of oxidation on the defect of reduced graphene oxides in graphene preparation

J Colloid Interface Sci. 2015 Jul 15:450:68-73. doi: 10.1016/j.jcis.2015.02.059. Epub 2015 Mar 2.

Authors

Yang Hu¹, Shaoxian Song², Alejandro Lopez-Valdivieso³

Affiliations

¹ School of Resources and Environmental Engineering, Wuhan University of Technology, Luoshi Road 122, Wuhan, Hubei 430070, China; Instituto de Metalurgia, Universidad Autonoma de San Luis Potosi, Av. Sierra Leona 550, San Luis Potosi C.P. 78210, Mexico.
² School of Resources and Environmental Engineering, Wuhan University of Technology, Luoshi Road 122, Wuhan, Hubei 430070, China. Electronic address: shaoxian@uaslp.mx.
³ Instituto de Metalurgia, Universidad Autonoma de San Luis Potosi, Av. Sierra Leona 550, San Luis Potosi C.P. 78210, Mexico.

PMID: 25801134
DOI: 10.1016/j.jcis.2015.02.059

Abstract

The relationship between the defects of reduced graphene oxide (RGO) and the oxidation degree of graphite in the preparation of graphene with chemical conversion method has been studied in this work. This study was performed on an artificial graphite through the measurements of X ray diffraction, Raman spectroscopy and particle size analysis. The experimental results have shown that there indeed was a close relationship between the defects and the oxidation degree, which appeared in the form of S-type curve. Also, it was found that a low KMnO4 addition would lead to a partial oxidation of graphite, leaving defects mainly on the edges of RGO; with a high KMnO4 addition, the defects on RGO mostly appeared on the surfaces.

Keywords: Graphene defects; Graphite oxidation; Raman spectroscopy; Reduced graphene oxide.