Figure 2

EDS spectra of CNS prepared at 650 °C from nettle stems (a) and leaves (b,c) using NaHCO3 as an activating agent. The ratio of nettle powder and NaHCO3 is 1:1 (a,b) and 1:2 (c).

EDS spectra of CNS prepared at 650 °C from nettle stems (a) and leaves (b,c) using NaHCO3 as an activating agent. The ratio of nettle powder and NaHCO3 is 1:1 (a,b) and 1:2 (c).