Fig. 13
From: Ionic liquid-assisted biomass-derived N, S-doped carbon dots with enhanced corrosion inhibition
EDS mapping images of the steel surfaces after 6 h of immersion in 0.5 M H2SO4 solution without IL-CDs (a) Fe; (b) O; (c) C; (d) S; and with IL-CDs: (e) Fe; (f) O; (g) C; (h) S; (i) N.
