| 초록 |
The exfoliation of three-dimensional graphite into two-dimensional graphene or graphene-like sheet(s) has so far remained the greatest challenge to the graphene research community. Hence, general approach is oxidation of graphite in strong acids to afford graphite oxide (GO). However, the GO, which contains a considerable amount of oxidized defects and GO becomes electrically insulating material, cannot be completely reduced to graphene. To overcome this problem, edge-functionalization of graphite is an alternative approach to minimize basal plane damage. Hence, graphite was reacted with 4-ethylbenzoic acid (EBA) in poly(phosphoric acid) (PPA)/phosphorous pentoxide (P2O5) medium at 130 °C as a “direct” Friedel-Crafts acylation reaction condition. The resultant edge-functionalized graphite (EFG) is expected to have minimum defects on its basal plane. To prove the scenario, various experimental techniques such as EA, XRD, TGA, TEM, Raman and AFM are to be studied. |
