TY  - JOUR
AU  - Milojkov, Dušan
AU  - Radosavljević-Mihajlović, Ana
AU  - Stanić, Vojislav
AU  - Nastasijević, B.J.
AU  - Radotić, Ksenija
AU  - Janković-Častvan, Ivona
AU  - Živković-Radovanović, Vukosava
PY  - 2023
UR  - https://ritnms.itnms.ac.rs/handle/123456789/653
AB  - Nanomaterials based on metal–doped fluorapatite (FAP) have attracted considerable interest as potential next–generation antimicrobial agents. In this study, Cu2+–doped FAP nanocrystals have been successfully synthesized by a neutralization method at room temperature. Their structural, optical, antimicrobial, and hemcompatible properties have been investigated. XRD, FTIR, FESEM, and N2 adsorption–desorption studies indicate the formation of single–phase FAP mesoporous nanopowders, composed of rod–like particles. TEM images confirmed the formation of nanorodes with a length of 60 nm and a width of about 18 nm. Rietveld analysis shows that the Cu2+ ions preferentially substitute Ca2 (6 h) sites in the hexagonal fluorapatite crystal structure. Fluorescence spectroscopy accompanied by MCR–ALS method confirms substitution of Cu2+ ions in FAP crystal lattice with extracting additional d–d band transition at green color from FAP broadband self–activated luminescence in violet–blue color. Antimicrobial studies conducted on Staphylococcus aureus, Escherichia coli and Micrococcus lysodeikticus showed that FAP nanopowder with the highest Cu2+ content have strong bacteriostatic action on Staphylococcus aureus bacterial strain in mediums containing nutrition matters. In addition, this sample in comparison to pure FAP achieved a high percentage of relative reduction of bacterial population for all three species, being >90% in most cases. Fungistatic action is noticed too, throwgh the slowing down mycelium growth of fungus Aspergillus niger, Aspergillus flavus and Penicillium roqueforti and reduction of sporulation of Aspergillus niger species. Cu2+–doped FAP nanocrystals shows a synergistic antimicrobial effect with Cu2+ and F− ions. Concerning the potential biomedical applications, the hemolysis ratios of the Cu2+–doped FAP samples were below 5%. The obtained results pointed out the possible use of the synthesized nanocrystals as broad–spectrum antimicrobial agents for various biomedical and health care preparations.
PB  - Elsevier B.V.
T2  - Journal of Photochemistry and Photobiology B: Biology
T1  - Synthesis and characterization of luminescent Cu2+–doped fluorapatite nanocrystals as potential broad–spectrum antimicrobial agents
VL  - 239
DO  - 10.1016/j.jphotobiol.2023.112649
UR  - conv_984
ER  - 

@article{
author = "Milojkov, Dušan and Radosavljević-Mihajlović, Ana and Stanić, Vojislav and Nastasijević, B.J. and Radotić, Ksenija and Janković-Častvan, Ivona and Živković-Radovanović, Vukosava",
year = "2023",
abstract = "Nanomaterials based on metal–doped fluorapatite (FAP) have attracted considerable interest as potential next–generation antimicrobial agents. In this study, Cu2+–doped FAP nanocrystals have been successfully synthesized by a neutralization method at room temperature. Their structural, optical, antimicrobial, and hemcompatible properties have been investigated. XRD, FTIR, FESEM, and N2 adsorption–desorption studies indicate the formation of single–phase FAP mesoporous nanopowders, composed of rod–like particles. TEM images confirmed the formation of nanorodes with a length of 60 nm and a width of about 18 nm. Rietveld analysis shows that the Cu2+ ions preferentially substitute Ca2 (6 h) sites in the hexagonal fluorapatite crystal structure. Fluorescence spectroscopy accompanied by MCR–ALS method confirms substitution of Cu2+ ions in FAP crystal lattice with extracting additional d–d band transition at green color from FAP broadband self–activated luminescence in violet–blue color. Antimicrobial studies conducted on Staphylococcus aureus, Escherichia coli and Micrococcus lysodeikticus showed that FAP nanopowder with the highest Cu2+ content have strong bacteriostatic action on Staphylococcus aureus bacterial strain in mediums containing nutrition matters. In addition, this sample in comparison to pure FAP achieved a high percentage of relative reduction of bacterial population for all three species, being >90% in most cases. Fungistatic action is noticed too, throwgh the slowing down mycelium growth of fungus Aspergillus niger, Aspergillus flavus and Penicillium roqueforti and reduction of sporulation of Aspergillus niger species. Cu2+–doped FAP nanocrystals shows a synergistic antimicrobial effect with Cu2+ and F− ions. Concerning the potential biomedical applications, the hemolysis ratios of the Cu2+–doped FAP samples were below 5%. The obtained results pointed out the possible use of the synthesized nanocrystals as broad–spectrum antimicrobial agents for various biomedical and health care preparations.",
publisher = "Elsevier B.V.",
journal = "Journal of Photochemistry and Photobiology B: Biology",
title = "Synthesis and characterization of luminescent Cu2+–doped fluorapatite nanocrystals as potential broad–spectrum antimicrobial agents",
volume = "239",
doi = "10.1016/j.jphotobiol.2023.112649",
url = "conv_984"
}

Milojkov, D., Radosavljević-Mihajlović, A., Stanić, V., Nastasijević, B.J., Radotić, K., Janković-Častvan, I.,& Živković-Radovanović, V.. (2023). Synthesis and characterization of luminescent Cu2+–doped fluorapatite nanocrystals as potential broad–spectrum antimicrobial agents. in Journal of Photochemistry and Photobiology B: Biology
Elsevier B.V.., 239.
https://doi.org/10.1016/j.jphotobiol.2023.112649
conv_984

Milojkov D, Radosavljević-Mihajlović A, Stanić V, Nastasijević B, Radotić K, Janković-Častvan I, Živković-Radovanović V. Synthesis and characterization of luminescent Cu2+–doped fluorapatite nanocrystals as potential broad–spectrum antimicrobial agents. in Journal of Photochemistry and Photobiology B: Biology. 2023;239.
doi:10.1016/j.jphotobiol.2023.112649
conv_984 .

Milojkov, Dušan, Radosavljević-Mihajlović, Ana, Stanić, Vojislav, Nastasijević, B.J., Radotić, Ksenija, Janković-Častvan, Ivona, Živković-Radovanović, Vukosava, "Synthesis and characterization of luminescent Cu2+–doped fluorapatite nanocrystals as potential broad–spectrum antimicrobial agents" in Journal of Photochemistry and Photobiology B: Biology, 239 (2023),
https://doi.org/10.1016/j.jphotobiol.2023.112649 .,
conv_984 .

TY  - JOUR
AU  - Prokić, Danijela
AU  - Vukcević, Marija
AU  - Mitrović, Angelina
AU  - Maletić, Marina
AU  - Kalijadis, Ana
AU  - Janković-Častvan, Ivona
AU  - Durkić, Tatjana
PY  - 2022
UR  - https://ritnms.itnms.ac.rs/handle/123456789/642
AB  - Carbon materials of different structural and textural properties (multi-walled carbon nanotubes, carbon cryogel, and carbonized hydrothermal carbon) were used as adsorbents for the removal of estrone, 17 beta-estradiol, and 17 alpha-ethinylestradiol from aqueous solutions. Chemical modification and/or activation were applied to alter surface characteristics and to increase the adsorption and desorption efficiency of carbon materials. Surfaces of treated and untreated carbon materials were characterized through the examination of the textural properties, the nature of surface functional groups, and surface acidity. It was found that the adsorption capacity of tested carbon materials is not directly proportional to the specific surface area and the content of surface oxygen groups. However, a high ratio of surface mesoporosity affected the adsorption process most prominently, by increasing adsorption capacity and the rate of the adsorption process. Adsorption of estrone, 17 beta-estradiol, and 17 alpha-ethinylestradiol followed pseudo-second-order kinetic model, while the equilibrium adsorption data were best fitted with the Langmuir isotherm model. Calculated mean adsorption energy values, along with the thermodynamic parameters, indicated that removal of selected hormones was dominated by the physisorption mechanism. High values of adsorption efficiency (88-100 %) and Langmuir adsorption capacities (29.45-194.7 mg/g) imply that examined materials, especially mesoporous carbon cryogel and multi-walled carbon nanotubes, can be used as powerful adsorbents for relatively fast removal of estrogen hormones from water.
PB  - Springer Heidelberg, Heidelberg
T2  - Environmental science and pollution research
T1  - Adsorption of estrone, 17 beta-estradiol, and 17 alpha-ethinylestradiol from water onto modified multi-walled carbon nanotubes, carbon cryogel, and carbonized hydrothermal carbon
EP  - 4445
IS  - 3
SP  - 4431
VL  - 29
DO  - 10.1007/s11356-021-15970-4
UR  - conv_913
ER  - 

@article{
author = "Prokić, Danijela and Vukcević, Marija and Mitrović, Angelina and Maletić, Marina and Kalijadis, Ana and Janković-Častvan, Ivona and Durkić, Tatjana",
year = "2022",
abstract = "Carbon materials of different structural and textural properties (multi-walled carbon nanotubes, carbon cryogel, and carbonized hydrothermal carbon) were used as adsorbents for the removal of estrone, 17 beta-estradiol, and 17 alpha-ethinylestradiol from aqueous solutions. Chemical modification and/or activation were applied to alter surface characteristics and to increase the adsorption and desorption efficiency of carbon materials. Surfaces of treated and untreated carbon materials were characterized through the examination of the textural properties, the nature of surface functional groups, and surface acidity. It was found that the adsorption capacity of tested carbon materials is not directly proportional to the specific surface area and the content of surface oxygen groups. However, a high ratio of surface mesoporosity affected the adsorption process most prominently, by increasing adsorption capacity and the rate of the adsorption process. Adsorption of estrone, 17 beta-estradiol, and 17 alpha-ethinylestradiol followed pseudo-second-order kinetic model, while the equilibrium adsorption data were best fitted with the Langmuir isotherm model. Calculated mean adsorption energy values, along with the thermodynamic parameters, indicated that removal of selected hormones was dominated by the physisorption mechanism. High values of adsorption efficiency (88-100 %) and Langmuir adsorption capacities (29.45-194.7 mg/g) imply that examined materials, especially mesoporous carbon cryogel and multi-walled carbon nanotubes, can be used as powerful adsorbents for relatively fast removal of estrogen hormones from water.",
publisher = "Springer Heidelberg, Heidelberg",
journal = "Environmental science and pollution research",
title = "Adsorption of estrone, 17 beta-estradiol, and 17 alpha-ethinylestradiol from water onto modified multi-walled carbon nanotubes, carbon cryogel, and carbonized hydrothermal carbon",
pages = "4445-4431",
number = "3",
volume = "29",
doi = "10.1007/s11356-021-15970-4",
url = "conv_913"
}

Prokić, D., Vukcević, M., Mitrović, A., Maletić, M., Kalijadis, A., Janković-Častvan, I.,& Durkić, T.. (2022). Adsorption of estrone, 17 beta-estradiol, and 17 alpha-ethinylestradiol from water onto modified multi-walled carbon nanotubes, carbon cryogel, and carbonized hydrothermal carbon. in Environmental science and pollution research
Springer Heidelberg, Heidelberg., 29(3), 4431-4445.
https://doi.org/10.1007/s11356-021-15970-4
conv_913

Prokić D, Vukcević M, Mitrović A, Maletić M, Kalijadis A, Janković-Častvan I, Durkić T. Adsorption of estrone, 17 beta-estradiol, and 17 alpha-ethinylestradiol from water onto modified multi-walled carbon nanotubes, carbon cryogel, and carbonized hydrothermal carbon. in Environmental science and pollution research. 2022;29(3):4431-4445.
doi:10.1007/s11356-021-15970-4
conv_913 .

Prokić, Danijela, Vukcević, Marija, Mitrović, Angelina, Maletić, Marina, Kalijadis, Ana, Janković-Častvan, Ivona, Durkić, Tatjana, "Adsorption of estrone, 17 beta-estradiol, and 17 alpha-ethinylestradiol from water onto modified multi-walled carbon nanotubes, carbon cryogel, and carbonized hydrothermal carbon" in Environmental science and pollution research, 29, no. 3 (2022):4431-4445,
https://doi.org/10.1007/s11356-021-15970-4 .,
conv_913 .