Dorontić Slađana and Marković Olivera and Kleut Duška and Jovanovic Svetlana: Amino functionalized graphene quantum dots - new fluorescent sensor for Co2+ ions.
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Abstract
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.
Item Type: | Conference or Workshop Item |
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Journal or Publication Title: | Proceedings of the International Symposium on Analytical and Environmental Problems |
Date: | 2021 |
Volume: | 27 |
ISBN: | 978-963-306-835-9 |
Page Range: | pp. 107-111 |
Language: | English |
Publisher: | University of Szeged |
Place of Publication: | Szeged |
Event Title: | International Symposium on Analytical and Environmental Problems (27.) (2021) (Szeged) |
Related URLs: | http://acta.bibl.u-szeged.hu/75798/ |
Uncontrolled Keywords: | Környezetkémia, Kémia |
Additional Information: | Bibliogr.: 111. p. ; ill. ; összefoglalás angol nyelven |
Subjects: | 01. Natural sciences 01. Natural sciences > 01.04. Chemical sciences |
Date Deposited: | 2022. May. 30. 08:20 |
Last Modified: | 2022. Aug. 08. 15:40 |
URI: | http://acta.bibl.u-szeged.hu/id/eprint/75937 |
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