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http://dx.doi.org/10.7464/ksct.2021.27.2.132

A Study on the Preparation and Purification Characteristics of Graphene Oxide by Graphite Type  

Jeong, Kyeom (Department of Chemical Engineering, Hankyong National University)
Kim, Young-Ho (Department of Chemical Engineering, Hankyong National University)
Publication Information
Clean Technology / v.27, no.2, 2021 , pp. 132-138 More about this Journal
Abstract
Research is being conducted on graphene to provide graphene having both excellent physical as well as electrical properties in addition to unique physical properties. In this study, Hummer's method, which is a representative method for chemical exfoliation, was applied in order to investigate the possibility of the mass production of high-quality graphene oxide. Three types of graphite (graphite, crystalline graphite, and expanded graphite) were used in the preparation of graphene oxide with variations in the amount of potassium permanganate added, reaction temperature, and reaction time. Then a Fourier transform infrared spectroscopy (FT-IR), a Raman spectrometer, and a transmission electron microscope (TEM) were used to measure the quality of the prepared graphene oxide. Of the three types of graphite used in this experiment, crystalline graphite showed the highest quality. The prepared graphene oxide was then purified with an organic solvent, and an analysis conducted using energy dispersive X-ray spectroscopy (EDS). From the results of the residual values, we were able to confirm that both acid wastewater and wastewater were best purified using cyclohexane. The method for manufacturing graphene oxide as well as the method of purification using organic solvents that are presented in this study are expected to have less of an environmental impact, making them environmentally friendly. This makes them suitable for use in various industrial fields such as the film industry and for heat dissipation and as coating agents.
Keywords
Graphene; Graphene oxide; Chemical exfoliation; Organic solvent purification;
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