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56 Graphene – Synthesis, Characterization, Properties and Applications Fig. 10. XRD patterns of (a) graphite, oxidized graphite and supercritical fluid reduced graphene oxide, (b) hydrazine reduced graphite oxide and supercritical fluid reduced graphene oxide and (c) graphite and supercritical fluid reduced graphene oxide showing the peak shift after reduction. 6. Conclusion In summary, we have successfully demonstrated the potential application of SCFs as reaction medium for the exfoliation, surface modification and reduction of GO to high quality graphene in one-pot and rapid supercritical fluid method. We have introduced cheaper solvent methanol, as novel SCF for graphite exfoliation as well as for molecular engineering of GO and graphene to restore its original structural and electronic properties. In-situ surface functionalization of graphene under SCF gives efficient route to alter the electronic properties of GS. The SCF reduction of GO to GS shows a promising way of restoring original structure of graphene. The comparative analysis of hydrazine reduced GO and SCF reduced GO shows restoration of G band in the Raman spectra and (002) reflection in the XRD patterns. This result indicates that SCF process is very effective method among any other solution route to produce high quality GO reduced graphene.PDF Image | GRAPHENE SYNTHESIS CHARACTERIZATION PROPERTIES
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