Green Synthesis of Multifunctionalized, Nitrogen-Doped, Highly Fluorescent Carbon Dots from Waste Expanded Polystyrene and Its Application in the Fluorimetric Detection of Au3+ Ions in Aqueous Media
| Autor: | Bommana Siddaiah, Kaviyarasan Raji, Vadivel Ramanan, Perumal Ramamurthy |
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| Rok vydání: | 2018 |
| Předmět: |
Green chemistry
Aqueous solution Photoluminescence Materials science Renewable Energy Sustainability and the Environment General Chemical Engineering chemistry.chemical_element Quantum yield 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology Photochemistry 01 natural sciences Fluorescence 0104 chemical sciences Ion chemistry Environmental Chemistry 0210 nano-technology Luminescence Carbon |
| Zdroj: | ACS Sustainable Chemistry & Engineering. 6:1627-1638 |
| ISSN: | 2168-0485 |
| DOI: | 10.1021/acssuschemeng.7b02852 |
| Popis: | Synthesis of highly luminescent carbon dots (CDs) from waste materials gains much attention in the current scenario. We have converted waste expanded polystyrene (EPS), a nonbiodegradable environmental pollutant, into multifunctionalized fluorescent CDs. This can be a good scaling up approach for the large-scale synthesis of nitrogen-doped CDs with a high photoluminescence (PL) quantum yield (QY) of ∼20%. The as prepared CDs exhibit excellent water solubility and a longer PL lifetime (in nanoseconds). They also possess excellent photostability, low cytotoxicity, and stable luminescence QY in different solution environments. Selective and sensitive detection of Au3+ ions is demonstrated using these CDs as fluorescence probes, and a LOD of 53 nM is achieved. A detailed investigation revealed that the observed PL quenching is due to “coordination-induced aggregation caused PL quenching” mechanism. |
| Databáze: | OpenAIRE |
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