A facile, green synthesis of carbon quantum dots from Polyalthia longifolia and its application for the selective detection of cadmium
- Title
- A facile, green synthesis of carbon quantum dots from Polyalthia longifolia and its application for the selective detection of cadmium
- Creator
- Sariga; Ayilliath Kolaprath M.K.; Benny L.; Varghese A.
- Description
- Carbon quantum dots (CQDs) has received world-wide recognition for their outstanding physicochemical properties that have the ability to substitute the semiconductor quantum dots. Herein, we have developed a strategy to determine the presence of Cd2+ using CQDs as a fluorescence probe. The CQDs were synthesized from the leaves of Polyalthia longifolia (a natural source) through a one-step hydrothermal method. The CQDs obtained from Polyalthia longifolia (p-CQDs) was characterized using XRD, TEM, FTIR, Raman Spectroscopy, XPS Studies, UVVisible spectroscopy and PL Spectroscopy. The p-CQDs displayed bright red fluorescence under the UV light, with good water solubility, and appreciable photostability and a quantum yield of 22%. The p-CQDs had a quasi-spherical morphology with an average particle size of 3.33 nm. The p-CQDs showed high selectivity and sensitivity for the detection of Cd2+ with a low limit of detection of 2.4 nM and a wide linear range of 7.3 nM12 ?M. The PL intensity of the p-CQDs showed a quenching effect in presence of Cd2+ and the mechanism of quenching was validated via fluorescence lifetime decay studies. We have also studied the effectiveness of the fluorescent probe developed for Cd2+ sensing in real samples of ground water and industrial effluents. 2022 Elsevier Ltd
- Source
- Dyes and Pigments, Vol-210
- Date
- 2023-01-01
- Publisher
- Elsevier Ltd
- Subject
- Cadmium sensing; Carbon quantum dots; Fluorescence quenching; Hydrothermal synthesis; Industrial effluents
- Coverage
- Sariga, Department of Chemistry, CHRIST (Deemed to be University), Karnataka, Bangalore, 560029, India; Ayilliath Kolaprath M.K., Department of Chemistry, CHRIST (Deemed to be University), Karnataka, Bangalore, 560029, India; Benny L., Department of Chemistry, CHRIST (Deemed to be University), Karnataka, Bangalore, 560029, India; Varghese A., Department of Chemistry, CHRIST (Deemed to be University), Karnataka, Bangalore, 560029, India
- Rights
- Restricted Access
- Relation
- ISSN: 1437208; CODEN: DYPID
- Format
- Online
- Language
- English
- Type
- Article
Collection
Citation
Sariga; Ayilliath Kolaprath M.K.; Benny L.; Varghese A., “A facile, green synthesis of carbon quantum dots from Polyalthia longifolia and its application for the selective detection of cadmium,” CHRIST (Deemed To Be University) Institutional Repository, accessed February 24, 2025, https://archives.christuniversity.in/items/show/14416.