Amino functionalized graphene quantum dots - new fluorescent sensor for Co2+ ions

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
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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