Please use this identifier to cite or link to this item: 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

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