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Detection of p-phenylenediamine Based on a Glassy Carbon Electrode Modified with Nitrogen Doped Graphene

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Figure

Figure 1.   (a), (b) TEM and AFM image of nitrogen doped graphene.
Figure 3.   (a) XPS spectra of NG, The peaks located at 285, 399, and 534.0 eV indicate the carbon, nitrogen, and oxygen elements, respectively
Figure 4.  Cyclic voltammograms of bare GCE, G@GCE and NG@GCE in 0.1 M KCl solution containing 0.1 mM p-phenylenediamine at a scan rate of 100 mV/s
Figure 5.  (a) Cyclic voltammograms (CVs) of bare GCE, G@GCE and NG@GCE in 0.1 M KCl solution containing 0.1 mM p-phenylenediamine at a scan rate of 100 mV/s
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