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dc.creatorDorontić, Slađana
dc.creatorMarković, Olivera
dc.creatorKleut, Duška
dc.creatorJovanović, Svetlana
dc.date.accessioned2021-12-07T15:19:33Z
dc.date.available2021-12-07T15:19:33Z
dc.date.issued2021
dc.identifier.isbn978-86-80321-36-3
dc.identifier.urihttps://cer.ihtm.bg.ac.rs/handle/123456789/4890
dc.description.abstractIn the era of pollution and hazardous materials, new methods for the detection of pollutants in the environment are urgently needed. Due to their specific features such as photoluminescence (PL) in the visible part of the spectrum, dispersibility in water, and organic solvents, nontoxicity, and biocompatibility, graphene quantum dots (GQDs) attract attention in optical sensing of various ions and molecules. In this study, pristine graphene quantum dots (p-GQDs) were produced in a simple single-step electrochemical top-down approach using graphite electrodes as a starting material, and dispersion of sodium-hydroxide in 96% ethanol as a medium for electrochemical reaction. These p-GQDs were gamma-irradiated in a dose of 25 kGy in presence of ethylenediamine in Ar medium to introduce amino groups in their crystal lattice. Results obtained from AFM microscopy indicate the height-uniformity of irradiated GQDs. The presence of amino groups in GQDs was confirmed by FTIR, XPS, and UV-Vis spectroscopies. According to results obtained from PL spectroscopy, a significant narrowing of emission band in irradiated GQDs was observed. In further research, these GQDs were investigated as a potential PL sensor for iron which is one of the most abundant heavy metal in the environment. In the preliminary investigation, a water dispersion of irradiated GQDs was mixed with Fe(III) solution in concentrations of 50 and 100 µM. Using a PL spectroscopy the PL intensity of irradiated GQDs in presence of Fe (III) was measured. From the obtained results, it can be seen that Fe(III) ions lead to quenching of GQDs PL intensity. Then, PL intensities were measured in presence of Fe(III) ions in concentration range 0-100 µM. With an increase of Fe(III) concentration, the PL intensity of GQDs decreased. It can be concluded that gamma-irradiated amino-doped GQDs have significant potential in the so-called ,,turn of“ detection of Fe(III) ions in the aqueous mediumsr
dc.language.isoensr
dc.publisherBelgrade, Serbia : Institute of Technical Sciences of SASAsr
dc.relationinfo:eu-repo/grantAgreement/MESTD/inst-2020/200026/RS//sr
dc.relationinfo:eu-repo/grantAgreement/MESTD/inst-2020/200017/RS//sr
dc.rightsopenAccesssr
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.sourceProgram and the Book of Abstracts - Nineteenth Young Researchers Conference – Materials Science and Engineeringsr
dc.subjectGraphene Quantum Dotssr
dc.subjectFe(III)sr
dc.titleGraphene quantum dots with amino groups as a potential photoluminescent probe for Fe(III) ionssr
dc.typeconferenceObjectsr
dc.rights.licenseBYsr
dc.citation.spage35
dc.citation.epage35
dc.description.otherNineteenth Young Researchers’ Conference - Materials Science and Engineering: December 1-3, 2021, Belgrade, Serbiasr
dc.identifier.rcubhttps://hdl.handle.net/21.15107/rcub_cer_4890
dc.identifier.fulltexthttp://cer.ihtm.bg.ac.rs/bitstream/id/21221/bitstream_21221.pdf
dc.type.versionpublishedVersionsr


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