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.
TY - CONF
AU - Dorontić, Slađana
AU - Marković, Olivera
AU - Kleut, Duška
AU - Jovanović, Svetlana
PY - 2021
UR - https://cer.ihtm.bg.ac.rs/handle/123456789/4882
AB - 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.
PB - Szeged, Hungary : University of Szeged
C3 - Proceedings - The 27th International Symposium on Analytical and Environmental Problems
T1 - Amino functionalized graphene quantum dots - new fluorescent sensor for Co2+ ions
SP - 107
EP - 111
UR - https://hdl.handle.net/21.15107/rcub_cer_4882
ER -
@conference{
author = "Dorontić, Slađana and Marković, Olivera and Kleut, Duška and Jovanović, Svetlana",
year = "2021",
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.",
publisher = "Szeged, Hungary : University of Szeged",
journal = "Proceedings - The 27th International Symposium on Analytical and Environmental Problems",
title = "Amino functionalized graphene quantum dots - new fluorescent sensor for Co2+ ions",
pages = "107-111",
url = "https://hdl.handle.net/21.15107/rcub_cer_4882"
}
Dorontić, S., Marković, O., Kleut, D.,& Jovanović, S.. (2021). Amino functionalized graphene quantum dots - new fluorescent sensor for Co2+ ions. in Proceedings - The 27th International Symposium on Analytical and Environmental Problems
Szeged, Hungary : University of Szeged., 107-111.
https://hdl.handle.net/21.15107/rcub_cer_4882
Dorontić S, Marković O, Kleut D, Jovanović S. Amino functionalized graphene quantum dots - new fluorescent sensor for Co2+ ions. in Proceedings - The 27th International Symposium on Analytical and Environmental Problems. 2021;:107-111.
https://hdl.handle.net/21.15107/rcub_cer_4882 .
Dorontić, Slađana, Marković, Olivera, Kleut, Duška, Jovanović, Svetlana, "Amino functionalized graphene quantum dots - new fluorescent sensor for Co2+ ions" in Proceedings - The 27th International Symposium on Analytical and Environmental Problems (2021):107-111,
https://hdl.handle.net/21.15107/rcub_cer_4882 .
