Facile Synthesis of Mesoporous Graphene Materials from Potassium Humate for Supercapacitor Electrodes

Figure 3

Full-range XPS spectra of MG-X and MC (a), C1s XPS spectra of MC (b), C1s XPS spectra of MG-3 (c), and Raman spectra of MG-X (d).

(a)

(b)

(c)

(d)