Amino functionalized graphene quantum dots - new fluorescent sensor for Co2+ ions
Graphene quantum dots (GQDs) were fabricated by simple electrochemical oxidation of graphite electrodes. Modified GQDs were obtained by gamma irradiation of GQDs, EDA, and IPA mixture at a dose of 25 kGy. In this approach, GQDs with the amino groups were produced (25γ-GQDs). These GQDs have shown a...
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| Dokumentumtípus: | Könyv része |
| Megjelent: |
University of Szeged
Szeged
2021
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| Sorozat: | Proceedings of the International Symposium on Analytical and Environmental Problems
27 |
| Kulcsszavak: | Környezetkémia, Kémia |
| Tárgyszavak: | |
| Online Access: | http://acta.bibl.u-szeged.hu/75937 |
| Tartalmi kivonat: | Graphene quantum dots (GQDs) were fabricated by simple electrochemical oxidation of graphite electrodes. Modified GQDs were obtained by gamma irradiation of GQDs, EDA, and IPA mixture at a dose of 25 kGy. In this approach, GQDs with the amino groups were produced (25γ-GQDs). These GQDs have shown a high uniformity, good dispersibility in water, and strong photoluminescence in the blue part of the electromagnetic spectrum. Modified GQDs were studied in the optical detection of Co2+ ions. The PL intensities of GQDs were measured in the presence of Co2+ ions in the concentration range 0-7.5 µmol L-1 . It was demonstrated that PL intensities decreased linearly in the concentration range 0-2.5 µmol L-1 . The value of the coefficient of determination (R2= 0.95949) indicates the potential of 25γ-GQDs for application in optical sensing of Co2+ ions. |
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| Terjedelem/Fizikai jellemzők: | 107-111 |
| ISBN: | 978-963-306-835-9 |