Figure 7.
(a) CV responses of bare GCE and Ag-ZnO/GCE (b) 4-NP sensing activity of the bare GCE and Ag-ZnO/GCE electrode with presence of 500 µM 4-NP containing 0.1 M PBS (pH = 7) solution. (Accumulation time: 2 min, catalyst loading volume: 10 µL).
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