Electrochemical Sensor for o-Nitrophenol Based on β-Cyclodextrin Functionalized Graphene Nanosheets
Figure 4
(a) Cyclic voltammograms of 50 μM o-NP at CD-GNs/GCE in a series of phosphate buffer solutions with different pH (a–e): 4, 5, 6, 7, and 8; (b) the corresponding pH-current plot. (c) The influence of the amount of CD-GNs on the peak currents. (d) The influence of the accumulation time on the peak currents.
