Electrochemical Sensor for o-Nitrophenol Based on β-Cyclodextrin Functionalized Graphene Nanosheets

Figure 2

Cyclic voltammograms of 50 μM o-NP at GCE (curve a), GNs/GCE (curve b), and CD-GNs/GCE (curve c) in 0.1 M phosphate buffer (pH 7.0). Scan rate: 50 mV s⁻¹.