Fig. 6

CV-based detection results. (a) CVs recorded at the 0.05 V s−1 scan rate in 0.1 M NaOH supporting electrolyte and in the presence of various DCF concentrations ranged from 3.4 to 34 µM on the NiCo2O4/GC electrode. (b) CVs recorded at the 0.05 V s−1 scan rate in 0.1 M NaOH supporting electrolyte and in the presence of various DCF concentrations ranged from 3.4 to 34 µM on the GC electrode. (c) Calibration plots for DCF concentrations ranged from 3.4 to 34 µM on the NiCo2O4/GC. (d) Calibration plots for DCF concentrations ranged from 3.4 to 34 µM on the GC electrode.