Figure 7
The functional groups and structural analysis.
(a) The IR spectra of CNG-DMF, CNG-EtOH, and CNG-H2O, labeled by (a–c), respectively. (b) The IR spectra of the rGO-DMF, rGO-EtOH, and rGO-H2O (labeled by (a–c), respectively) without adding the cobalt oxide precursor. (c) The UV/Vis spectra of 0.2 M cobalt acetate in water (blue curve), and the red curve represents the addition of excess DMF in the 0.2 M cobalt acetate solutions shown in the blue curve. The insets are the solution photographs corresponding to the blue and red curves.
