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B,N-Co-doped graphene quantum dots as fluorescence sensor for detection of Hg2+ and F− ions
| Content Provider | Semantic Scholar |
|---|---|
| Author | Yang, Panxing Su, Jie Hui. Guo, Ruiwei Yao, Fanglian Yuan, Caideng |
| Copyright Year | 2019 |
| Abstract | Herein, we develop a fluorescence sensing platform based on boron and nitrogen co-doped graphene quantum dots (B,N-GQDs), which are synthesized by a one-step bottom-up hydrothermal method. The prepared B,N-GQDs exhibit high-fluorescence quantum yield (75%) and long fluorescence lifetime (12.86 ns). In the B,N-GQDs–Hg2+ system, the fluorescence of B,N-GQDs is quenched with increasing Hg2+ concentration due to the affinity interaction between the surface functional groups of B,N-GQDs and Hg2+. Subsequently, the quenched fluorescence of the B,N-GQDs–Hg2+ system is gradually recovered with the addition of F− ions due to their strong affinity with Hg2+. The linear ranges for the detection of Hg2+ and F− ions are 0.2–2.6 μM and 0.25–7.0 mM, respectively, and the detection limits are 0.16 μM and 0.18 mM for Hg2+ and F− ions, respectively, which are below the regulatory level of 0.25 μM and 0.526 mM in the Integrated Wastewater Discharge Standard. Therefore, B,N-GQDs provide a facile and effective approach for the detection of both Hg2+ and F− ions with real-time monitoring and high-speed measuring. |
| Starting Page | 1879 |
| Ending Page | 1883 |
| Page Count | 5 |
| File Format | PDF HTM / HTML |
| DOI | 10.1039/C9AY00249A |
| Volume Number | 11 |
| Alternate Webpage(s) | http://www.rsc.org/suppdata/c9/ay/c9ay00249a/c9ay00249a1.pdf |
| Alternate Webpage(s) | https://doi.org/10.1039/C9AY00249A |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
