Facile and Green synthesis of Novel Fluorescent CQD’S from Calotropis Gigantea (blue) Leaves for Photocatalytic Degradation of Dyes

A sustainable, economical, and efficient method for producing biocompatible novel fluorescent carbon quantum dots (CQD’s) using the leaves of medicinal plant Calotropis gigantean by using microwave assist method. The obtained CG CQD’S were characterized by UV-Visible spectrophotometer, Fourier Transform Infrared Spectroscopy(FTIR), X-Ray diffraction(XRD), Dynamic light scattering (DLS) and Fluorescence spectroscopy. The synthesized carbon quantum dots (CQD's) are used to study the photo catalytic dye degradation of Bromophenol and Rose Bengal. The photocatalytic degradation of rose bengal by CQD’S with two different concentrations (50μg/ml and 100μg/ml ) was 18.5% and 35.33% degradation respectively. The photocatalytic degradation of bromo phenol blue by CQD’S with two different concentrations (50μg/ml and 100μg/ml) was 19.7% and 36.14 % degradation respectively. Keywords; Green synthesis, Calotropis Gigantea(CG),Carbon quantum dots, Photocatalytic, Rose Bengal, Bromphenol.