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

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

G C Asheesh1, G Raman1.2, Vijaya Nirmala Pangi2, Abhinash Marukurti1,2, B Mallikarjuna1*

1 Dept of Chemistry & Central Instrumentation Lab (DST-FIST) , Government College (A)- Rajahmundry

2 School of Life & Health Sciences, Adikavi Nannaya University-Rajahmundry

Corresponding Author

Dr B Mallikarjuna,

Department of Chemistry

DST-FIST Central Instrumentation Lab (CIL)

Government College (A)-Rajahmundry

East Godavari Dt, A.P- India

Email:- drmallichem@gcrjy.ac.in

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Abstract

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.