Fig. 3. The EIS characterization of GCE, β-CD-rGO/GCE and CP5-rGO/GCE via [Fe(CN)6]3−/4− (2.0 mM) redox couple (1 : 1) with KCl (0.1 M) as supporting electrolyte (A). FTIR spectra of β-CD, β-CD-rGO, rGO, CP5-rGO and CP5 (B). TGA curves of rGO, CP5-rGO and β-CD-rGO (C). Zeta potentials of rGO, β-CD-rGO and CP5-rGO (D). XPS survey spectra of rGO and CP5-rGO (E).
