Constructing realistic models for GO is crucial for understanding its behavior and properties. Despite the large number of experimental (e.g., NMR, FTIR, X-ray photoelectron spectroscopy) and theoretical studies that aimed at revealing the possible GO structures, the issue is still controversial, with many GO models being used currently, see for example Sheka et al. The state of affairs can be summarized as follows: (1) Different types of oxygencontaining groups are distributed on the graphene surface and a relatively small number of these groups could be attached to the edges. (2) There is no correlation between the oxygen content and the types of these functional groups. (3) The oxidants on the basal plane of the graphene sheet are mostly epoxide (C-O-C) and hydroxyl (OH) groups, whereas other functional groups like COOH and C=O are found at the edges. (4) To date, there is no agreement on a specific spatial arrangement of the functional groups on the surface of the graphene sheet.