Facile synthesis of N-doped carbon dots for direct/indirect detection of heavy metal ions and cell imaging
| Autor: | Binwei Yan, Zijun Xu, Kejia Wang, Shuwen Hu, Jin Liu, Zideng Gao, Xueqin Ren |
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| Rok vydání: | 2020 |
| Předmět: |
inorganic chemicals
Ions Photoluminescence Chemistry Health Toxicology and Mutagenesis Metal ions in aqueous solution Quantum yield General Medicine 010501 environmental sciences 01 natural sciences Pollution Fluorescence Hydrothermal circulation Carbon Spectrometry Fluorescence Metals Heavy Quantum Dots Environmental Chemistry MTT assay Selectivity Cytotoxicity 0105 earth and related environmental sciences Nuclear chemistry |
| Zdroj: | Environmental science and pollution research internationalReferences. 28(16) |
| ISSN: | 1614-7499 |
| Popis: | In this study, an approach for the facile, rapid, energy-saving, and sensitive determination of Fe3+ and Cr(VI) was developed. L-arginine/D-glucose carbon quantum dots (Arg/Glu-CQDs), with a photoluminescence quantum yield of 21%, were synthesized from L-arginine and D-glucose through a facile, hydrothermal process. The maximum emission wavelength of Arg/Glu-CQDs was observed at 450 nm, under an excitation wavelength of 365 nm. In addition, Arg/Glu-CQDs exhibited a sensitive and selective response to Fe3+ compared to Fe2+ and other metal ions. The Arg/Glu-CQDs' fluorescence was noticeably quenched through the inner filter effect (IFE) when Arg/Glu-CQDs were mixed with Fe3+. Accordingly, the Arg/Glu-CQDs/Fe2+ system could selectively detect Cr(VI); Cr(VI) could oxidize Fe2+ to Fe3+ and quench the fluorescence. The fluorescence sensor system (i.e., the Arg/Glu-CQDs/Fe2+ system) showed high sensitivity and excellent selectivity for the detection of Fe3+ and Cr(VI) in river water samples. Satisfactory detection efficiencies ranging from 97.07 to 103.46% were obtained. The cytotoxicity of Arg/Glu-CQDs was evaluated through an MTT assay using A549 cells as the target, to extend the application of Arg/Glu-CQDs to biological systems; the MTT assay indicated that the Arg/Glu-CQDs is non-cytotoxicity. Arg/Glu-CQDs were also successfully imaged in A549 cells indicating further application possibilities in bioimaging. Graphical abstract. |
| Databáze: | OpenAIRE |
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