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Time-efficient syntheses of nitrogen and sulfur co-doped graphene quantum dots with tunable luminescence and their sensing applications
| Content Provider | Semantic Scholar |
|---|---|
| Author | Xu, Hongbo Zhou, Shenghai Xiao, Lili Yuan, Qunhui |
| Copyright Year | 2016 |
| Abstract | Heteroatom doped graphene quantum dots (GQDs) are particularly promising in bioimaging and fluorescent sensing because of their better photoluminescence tunability compared to pristine GQDs. Herein, two nitrogen and sulfur co-doped GQDs (N,S-GQDs) with varied fluorescence emission wavelength were synthesized via HNO3 vapour cutting route, in which a porous polythiophene-derived carbon served as the sulfur source while the HNO3 vapour was presented as the scissor and the nitrogen source. The as-prepared N,S-GQDs exhibited blue and yellow-green coloured fluorescence, owing to their varied morphologies and surface states resulted from varied reaction temperature. Compared to the typical top-down syntheses via hydrothermal or solvothermal routes, the present HNO3 vapour cutting method is prominently efficient in time expense and product separation. An application of the obtained greenish-yellow N,S-GQDs for highly selective and sensitive fluorescent detection of Fe3+ was demonstrated, with a linear range of 0–130 μM and a detection limit of 0.07 μM. The protocol reported here can also be readily applied for facial synthesis of other heteroatom doped GQDs. |
| Starting Page | 36554 |
| Ending Page | 36560 |
| Page Count | 7 |
| File Format | PDF HTM / HTML |
| DOI | 10.1039/C6RA05175H |
| Volume Number | 6 |
| Alternate Webpage(s) | http://www.rsc.org/suppdata/c6/ra/c6ra05175h/c6ra05175h1.pdf |
| Alternate Webpage(s) | https://doi.org/10.1039/C6RA05175H |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
