Fig. 9.

(a) DPASV graph of N, S-nanocarbon in the presence of different metal ions viz., Ca, K⁺, Cd²⁺, Fe²⁺, Ag⁺, Ni²⁺, Fe³⁺, Al³⁺, Pb²⁺, Co²⁺, Na⁺ and Hg²⁺ at a concentration (a) 1 mM (b) 5–150 μM in acetate buffer and (c) 10–60 μM in tap water.