Figure 1
From: Facile reduction of graphene oxide suspensions and films using glass wafers

(a) Optical photographs of the initial graphene oxide aqueous suspension of 0.01 wt% (GO) and GO aqueous suspensions of 0.01 wt%, reduced using sodium silicate glass (rGO_S-gl), alkali-barium silicate glass (rGO_AB-gl), magnesium silicate glass (rGO_Mg-gl). (b) The UV-Vis spectra of the initial GO and rGOs obtained using various glass wafers as reducing agents. The spectra are vertically offset for clarity.