Fig. 8From: Carbon Dots as an Effective Fluorescent Sensing Platform for Metal Ion Detectiona Schematic of N-doped graphene-(Hg2+) complex and N-doped graphene on the addition of I-ions. b The change in the fluorescence emission of N-doped graphene (5 μg L−1) in water on the addition of Hg2+ ions. c Fluorescence quenching of Hg2+ ions compared to that of other metal ions [86]Back to article page