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http://hdl.handle.net/2080/4347
Title: | L-Glutathione Functionalized Graphitic Carbon Nitride Quantum Dots for Fluorescent Sensing of Pb2+ In Water |
Authors: | Pattnayak, Samarjit Hota, Garudadhwaj |
Keywords: | L-Glutathione (GSH) g-C3N4 QDs Pb2+ ions |
Issue Date: | Jan-2024 |
Citation: | 37th Annual Conference of Orissa Chemical Society & National Conference on Molecules to Materials (MTM-2024), Ravenshaw University, Cuttack, Orissa, India, 04 January 2024 |
Abstract: | A facile, sensitive, and selective fluorescence detection method for Pb2+ ions is designed using L-Glutathione (GSH) functionalized graphitic carbon nitride quantum dots (GSH@g-C3N4 QDs). A carbodiimide-activated coupling reaction is used to bind GSH onto g-C3N4 QDs. When excited at 340 nm, the as-obtained passivated quantum dots exhibit strong blue emissions at 420 nm. With a relative quantum yield of 27%, the system demonstrates exceptional stability against ionic strength and photobleaching. Additionally, it is discovered that the fluorescence emission of the sensor is selectively quenched in the presence of Pb2+ ions. The limit of detection (LOD) for Pb2+ is measured to be 0.025 μM in a linear range of 0.01 μM-0.1 μM. The average lifetime calculations from the lifetime decay experiment along with UV–vis. absorption studies suggest that the quenching pattern follows a static quenching mechanism. Finally, the system is used in real water samples to detect Pb2+ with more than 90% recovery percentage. |
Description: | Copyright belongs to proceeding publisher |
URI: | http://hdl.handle.net/2080/4347 |
Appears in Collections: | Conference Papers |
Files in This Item:
File | Description | Size | Format | |
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2024_OCS-MTM_SPattnaik_L-Glutathione.pdf | Poster | 4.4 MB | Adobe PDF | View/Open Request a copy |
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