Facile Synthesis of Copper-Coated-Reduced-Graphene-Oxide and Its Application as a Highly Sensitive Electrochemical Sensor for Hydroquinone

Figure 8

Cyclic voltammograms at Cu/rGO/GCE in 0.1 M PBS (pH 6.5) containing 5.0 μM HQ with different scan rates of 10, 20, 40, 60, 80, 100, 120, 150, 180, 200, 220, and 240 mV·s⁻¹, respectively. Plots of peak currents vs. the square root of scan rates for HQ (inset).