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http://hdl.handle.net/2080/3718
Title: | Silver Nanoparticles Embedded Sulfur Doped Graphitic Carbon Nitride Quantum Dots for Fluorescence Sensing of Mercury Ions in Aqueous Media |
Authors: | Pattnayak, Samarjit Sahoo, Ugrabadi Choudhury, Shubhalaxmi Hota, Garudadhwaj |
Keywords: | Graphitic carbon nitride silver nanoparticles Nanosensor Hg2+ ions Static quenching |
Issue Date: | Aug-2022 |
Citation: | Frontiers In Materials for Technological Applications(FIMTA),CSIR-IMMT, Bhubaneswar, 3-5 August 2022 |
Abstract: | Graphitic carbon nitride (gCN) quantum dots, in recent years, have captivated immense interest in the field of sensing due to their unique optical and electronic properties. Here, we present a facile synthesis of silver nanoparticles embedded sulfur doped gCN quantum dots (Ag-S-gCN QDs) from thiourea, trisodium citrate, and silver nitrate by a low-temperature thermal treatment. The synthesized Ag-S-gCN QDs, with an average size of 3.7 nm, emitted strong blue fluorescence with a high relative quantum yield of 36.5 %. They exhibited significant stability against photobleaching and high ionic strength. The aforementioned quantum dots, under optimal conditions, were employed for fast, sensitive, and selective sensing of Hg2+ ions in distilled water as well as real water samples. A static quenching mechanism was established from the average lifetime calculation via a time-resolved decay experiment. The presence of silver nanoparticles resulted in a redox reaction with Hg2+ ions via electron transfer from metallic Ag to Hg2+ ions. Moreover, the proposed sensor was anticipated to open up a new avenue for convenient, sensitive, and selective sensing of potentially hazardous Hg2+ ions with substantial results. |
Description: | Copyright belongs to proceeding publisher |
URI: | http://hdl.handle.net/2080/3718 |
Appears in Collections: | Conference Papers |
Files in This Item:
File | Description | Size | Format | |
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2022_FIMTA_SPattnayak_Silver.pdf | Poster | 1.39 MB | Adobe PDF | View/Open |
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