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. 2022 Jan 7;12:117. doi: 10.1038/s41598-021-03495-2

Figure 7.

Figure 7

(A) Square wave voltammograms of p-NP (1.66 × 10–6 M) at GN:ZnO NC /GCE at different pH values (5.8, 6.2, 6.8, 7.4, 8 from right to left). Deposition potential: − 1 V. Deposition time 300 s. (B) Plot of pH against peak current (Ip) and peak potential (Ep).