engleski

Mechanochemical Synhesis Of Graphene Oxide With Variable Degree Of Oxidation

Graphene oxide (GO) is single-atom carbon layer, combination of unsaturated benzene rings and aliphatic heterocycles containing hydrophilic oxygen groups. Lately, GO has attracted significant attention, mostly as a potential material for mass production of graphene, but also for its potential for various other applications such as electronic and energy storage devices, biosensors, optical materials, electronic and energy storage devices and photocatalysts. A great advantage of GO are its tunable physicochemical properties which depend upon the degree of oxidation. Conventional chemical synthesis of GO mostly prefers the Hummers method. As a result, laboratory- and industrial-scale chemical synthesis of GO are inherently generating toxic waste. It is therefore essential to find greener and cheaper ways of its production. Here, we report versatile and eco-friendly approach to prepare high quality GO by use of mechanochemical ball milling of graphite in presence of KMnO4 and the stoichiometric amount of sulfuric acid. We have examined how various conditions of mechanochemical synthesis affect on the GOs degree of oxidation, which we have been able to obtain in the range from 17 % to 62 %. Prepared materials were characterised by powder X-ray diffraction, Raman spectroscopy, thermogravimetric analysis, FTIR spectroscopy and SEM/EDS microscopy.

Mechanochemical Synthesis ; Graphene oxide ; degree of oxidation

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