Figure 6
From: Facile reduction of graphene oxide suspensions and films using glass wafers
Illustration of the formation of intermediates consisting of the silicate anion (denoted by purple) and (a) epoxide (denoted by red), (b) hydroxyl (denoted by blue) or (c) carboxyl groups (denoted by green). (d,e) Elimination of the formed intermediates in the case of alkali silicate glass, resulting in removal of oxygen-containing groups with simultaneous perforation of the GO structure and formation of new carbonyl groups. (f–h) Removal of the intermediate formed by epoxide, hydroxyl and carboxyl groups in the presence of alkaline-earth cations.
