Synthesis Of Graphene Nanosheets By Electrochemical Exfoliation Of Graphite

759 words - 4 pages

A green, simple, and cost effective two step method to develop graphene nanosheets (GNS) by electrochemical exfoliation of graphite and its successive reduction by microwave is reported in present work. The morphology and microstructure of prepared GNS is studied by atomic force microscopy (AFM), X-ray diffraction (XRD), ultra violet spectroscopy (UV) and Fourier transform infrared spectroscopy (FT-IR); the experiments confirm the formation of high quality graphene nanosheets (GNS).
Our method is simple as well as versatile. This is a rapid, as a large production of graphene nano-sheets could be done in short time as compare to chemical reduction of graphene oxide. Secondly, it’s cost ...view middle of the document...

Usually, the GO is reduced by chemical methods using different reducing agents, e.g. hydrazine [14], hydroquinone [15], dimethylhydrazine [16], Ascorbic acid [17] and NaBH4, [18]. The reduction process has several demerits that the reactions are very slow and used reductants are so much hazardous. In recent times, the reduction of GO has been performed under various conditions such as alkaline condition [19], ultraviolet-assisted methods [20] and thermal methods [21]. Among these methods the thermal treatment is a green method in which no hazardous reductants are used but this process requires a rapid heating (>2000˚C min-1) up to 1050 ˚C in an oven under inert gas [22] or up to 800 ˚C under the existence of hydrogen gas [23]. On the other hand, rapid reduction of GO under an ambient condition is seems to be very difficult process. It is reported that graphite, in powdered form to a high temperature, in a short time can be heated in microwave and it had been efficiently applied in the pre-exfoliation of the graphite [24]. The production of well-dispersed graphene in a solvent without the assistant of surfactant or stabilizers is also a striking topic for its potential application or further modification for novel materials [25]. Though, the GO is hydrophilic and graphene is hydrophobic in nature, as a result the reduction of GO in water generally results in the...

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