Figure 10

Cyclic voltammetry (CV) of nettle stem carbon nanosheets, (a) char NS, (b) exfoliated by HNO3, (c) exfoliated by H2SO4 and (d) exfoliated by H3PO4.
Cyclic voltammetry (CV) of nettle stem carbon nanosheets, (a) char NS, (b) exfoliated by HNO3, (c) exfoliated by H2SO4 and (d) exfoliated by H3PO4.