Figure 4

(A) XPS survey spectra of pristine graphite, EOG, GO, annealed EOG and annealed GO. (B) High resolution XPS C1s spectra of pristine graphite, EOG and GO. (C) High resolution XPS C1s spectra of graphite, annealed EOG and annealed GO. Raman spectra (D) and XRD patterns (E) of graphite, annealed EOG and annealed GO.