Abstract
The work explores the preparation of graphene oxide (GO) from natural graphite by dry planetary ball milling technique under oxygen atmosphere. The ball milling was carried out between 4 and 8 hrs. The structure and composition were studied by various advanced characterization techniques. X-ray diffraction (XRD) confirms the successful formation of graphene oxide showing C(001) peak. X-ray photoelectron spectroscopy (XPS) agrees with XRD result exhibiting various oxygenated functional groups along with matrix of carbon. The increasing oxidation behaviour was confirmed from Raman study with increasing trend of I2D/IG ratio. The sample prepared by 8 hr ball milling exhibits BET surface area of 454 m2/g. The sheet type and folded morphology confirm the high quality formation of graphene oxide. The GO-8 hr shows a high O/C ratio (58.87). Purity of typical GO sample was confirmed from EDS analysis exhibiting only presence of carbon and oxygen.
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