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• W4292156847 endingPage "126633" @default.
• W4292156847 startingPage "126633" @default.
• W4292156847 abstract "Carbon dots (CDs) can be obtained from different sources including wastes and green biomass materials, which, together with the method of preparation, can contribute to reduce the cost of production of these nanomaterials. In this work we have prepared different CDs from cellulose and using hydrothermal carbonization. The obtained nanocarbons were functionalized to enhance the quantum yield (QY) by two different methods: in a one pot reaction where the CDs were obtained in the presence of certain amount of ammonia or through a reaction with a oligomeric poly(ethylene glycol) diamine (PEG1500 N) after the preparation of CDs. The obtained CDs were characterized by different techniques including Fourier transform infrared spectroscopy (FTIR), Transmission electron microscopy (TEM), UV-VIS spectroscopy, Fluorescence, and Potentiometric Titration. Size distribution measurements from isolated nanoparticles showed that the different obtained CDs presented a narrow size distribution, with the diameters in the range 0.7–3.0 nm. The CDs which presented high values of QY were used as probes for different metal ions, showing considerable selectivity and sensitivity for Fe 3+ ions and a limit of detection of 0.15 μM in the case of CDs modified with PEG1500 N oligomers. Finally, the results presented here show the possibility to obtain CDs with a relatively low cost method, using only water as solvent and with potential applications in different areas including those as probe for metal ions. • Carbon dots (CDs) were obtained from cellulose using hydrothermal carbonization. • The nanocarbons were functionalized by different methods to enhance the quantum yield. • The modified CDs were used as sensitive and selective probes for iron ions. • The PEG1500N-modified CD showed a limit of detection of 0.15 μM for Fe 3+ ions." @default.
• W4292156847 created "2022-08-18" @default.
• W4292156847 creator A5016964943 @default.
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• W4292156847 date "2022-10-01" @default.
• W4292156847 modified "2023-10-17" @default.
• W4292156847 title "Luminescent carbon dots obtained from cellulose and their applications as sensors for metal ions" @default.
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• W4292156847 doi "https://doi.org/10.1016/j.matchemphys.2022.126633" @default.
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