Fig. 3. DPV for (a) bare and a coated electrode for 2,4-DNT (20 μM in pH 7, 0.1 mM PBS) and a coated electrode for blank 0.1 mM PBS solution. (b) 2,4-DNT (20 μM in pH 7, 0.1 mM PBS) with pure Ag2O and ZnO nanoparticles and ZnO–Ag2O composite nanoflowers coated electrode. (c) CV for 2,4-DNT (20 μM in 0.1 mM, pH 7 PBS) at different scan rates (20–300 mV s−1). (d) Current vs. square root of scan rate (ν1/2) plot. (e) Plot of log current (I) vs. log scan rate (ν) for reduction peaks R1 and R2.
