TY  - JOUR
AU  - Ognjanović, Miloš
AU  - Jaćimović, Željko
AU  - Kosović-Perutović, Milica
AU  - Besu Žižak, Irina
AU  - Stanojković, Tatjana
AU  - Žižak, Željko
AU  - Dojčinović, Biljana
AU  - Stanković, Dalibor M.
AU  - Antić, Bratislav
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10733
AB  - Partial cation substitution can significantly change the physical properties of parent compounds. By controlling the chemical composition and knowing the mutual relationship between composition and physical properties, it is possible to tailor the properties of materials to those that are superior for desired technological application. Using the polyol synthesis procedure, a series of yttrium-substituted iron oxide nanoconstructs, γ-Fe2−xYxO3 (YIONs), was prepared. It was found that Y3+ could substitute Fe3+ in the crystal structures of maghemite (γ-Fe2O3) up to a limited concentration of ~1.5% (γ-Fe1.969Y0.031O3). Analysis of TEM micrographs showed that crystallites or particles were aggregated in flower-like structures with diameters from 53.7 ± 6.2 nm to 97.3 ± 37.0 nm, depending on yttrium concentration. To be investigated for potential applications as magnetic hyperthermia agents, YIONs were tested twice: their heating efficiency was tested and their toxicity was investigated. The Specific Absorption Rate (SAR) values were in the range of 32.6 W/g to 513 W/g and significantly decreased with increased yttrium concentration in the samples. Intrinsic loss power (ILP) for γ-Fe2O3 and γ-Fe1.995Y0.005O3 were ~8–9 nH·m2/Kg, which pointed to their excellent heating efficiency. IC50 values of investigated samples against cancer (HeLa) and normal (MRC-5) cells decreased with increased yttrium concentration and were higher than ~300 μg/mL. The samples of γ-Fe2−xYxO3 did not show a genotoxic effect. The results of toxicity studies show that YIONs are suitable for further in vitro/in vivo studies toward to their potential medical applications, while results of heat generation point to their potential use in magnetic hyperthermia cancer treatment or use as self-heating systems for other technological applications such as catalysis.
T2  - Nanomaterials
T1  - Self-Heating Flower-like Nanoconstructs with Limited Incorporation of Yttrium in Maghemite: Effect of Chemical Composition on Heating Efficiency, Cytotoxicity and Genotoxicity
VL  - 13
IS  - 5
SP  - 870
DO  - 10.3390/nano13050870
ER  - 

@article{
author = "Ognjanović, Miloš and Jaćimović, Željko and Kosović-Perutović, Milica and Besu Žižak, Irina and Stanojković, Tatjana and Žižak, Željko and Dojčinović, Biljana and Stanković, Dalibor M. and Antić, Bratislav",
year = "2023",
abstract = "Partial cation substitution can significantly change the physical properties of parent compounds. By controlling the chemical composition and knowing the mutual relationship between composition and physical properties, it is possible to tailor the properties of materials to those that are superior for desired technological application. Using the polyol synthesis procedure, a series of yttrium-substituted iron oxide nanoconstructs, γ-Fe2−xYxO3 (YIONs), was prepared. It was found that Y3+ could substitute Fe3+ in the crystal structures of maghemite (γ-Fe2O3) up to a limited concentration of ~1.5% (γ-Fe1.969Y0.031O3). Analysis of TEM micrographs showed that crystallites or particles were aggregated in flower-like structures with diameters from 53.7 ± 6.2 nm to 97.3 ± 37.0 nm, depending on yttrium concentration. To be investigated for potential applications as magnetic hyperthermia agents, YIONs were tested twice: their heating efficiency was tested and their toxicity was investigated. The Specific Absorption Rate (SAR) values were in the range of 32.6 W/g to 513 W/g and significantly decreased with increased yttrium concentration in the samples. Intrinsic loss power (ILP) for γ-Fe2O3 and γ-Fe1.995Y0.005O3 were ~8–9 nH·m2/Kg, which pointed to their excellent heating efficiency. IC50 values of investigated samples against cancer (HeLa) and normal (MRC-5) cells decreased with increased yttrium concentration and were higher than ~300 μg/mL. The samples of γ-Fe2−xYxO3 did not show a genotoxic effect. The results of toxicity studies show that YIONs are suitable for further in vitro/in vivo studies toward to their potential medical applications, while results of heat generation point to their potential use in magnetic hyperthermia cancer treatment or use as self-heating systems for other technological applications such as catalysis.",
journal = "Nanomaterials",
title = "Self-Heating Flower-like Nanoconstructs with Limited Incorporation of Yttrium in Maghemite: Effect of Chemical Composition on Heating Efficiency, Cytotoxicity and Genotoxicity",
volume = "13",
number = "5",
pages = "870",
doi = "10.3390/nano13050870"
}

Ognjanović, M., Jaćimović, Ž., Kosović-Perutović, M., Besu Žižak, I., Stanojković, T., Žižak, Ž., Dojčinović, B., Stanković, D. M.,& Antić, B.. (2023). Self-Heating Flower-like Nanoconstructs with Limited Incorporation of Yttrium in Maghemite: Effect of Chemical Composition on Heating Efficiency, Cytotoxicity and Genotoxicity. in Nanomaterials, 13(5), 870.
https://doi.org/10.3390/nano13050870

Ognjanović M, Jaćimović Ž, Kosović-Perutović M, Besu Žižak I, Stanojković T, Žižak Ž, Dojčinović B, Stanković DM, Antić B. Self-Heating Flower-like Nanoconstructs with Limited Incorporation of Yttrium in Maghemite: Effect of Chemical Composition on Heating Efficiency, Cytotoxicity and Genotoxicity. in Nanomaterials. 2023;13(5):870.
doi:10.3390/nano13050870 .

Ognjanović, Miloš, Jaćimović, Željko, Kosović-Perutović, Milica, Besu Žižak, Irina, Stanojković, Tatjana, Žižak, Željko, Dojčinović, Biljana, Stanković, Dalibor M., Antić, Bratislav, "Self-Heating Flower-like Nanoconstructs with Limited Incorporation of Yttrium in Maghemite: Effect of Chemical Composition on Heating Efficiency, Cytotoxicity and Genotoxicity" in Nanomaterials, 13, no. 5 (2023):870,
https://doi.org/10.3390/nano13050870 . .

TY  - JOUR
AU  - Vlahović, Filip
AU  - Ognjanović, Miloš
AU  - Đurđić, Slađana
AU  - Kukuruzar, Andrej
AU  - Antić, Bratislav
AU  - Dojčinović, Biljana
AU  - Stanković, Dalibor M.
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10919
AB  - We have set-up an electrochemical advanced oxidation process for ethidium bromide (1), based on the Eu-doped MnWO4 (Eu:MnWO4), obtained through a template-driven synthesis, along with developing a suitable monitoring method. Under galvanostatic conditions, Eu:MnWO4-coated graphite electrode serves as anode, applicable for removal of 1. To go further and augment the catalytic method, we have applied a modified carbon paste electrode for the monitoring of 1 with the limit of detection (LOD) of 54 nM. Enhancement of the hydrogen evolution reaction is an indication of electrocatalytic properties of the material, whereby developed method emerges as a candidate for straightforward application in electrochemical advanced oxidation processes (EAOPs). We have enriched experimental data with theoretical insights, provided by Density Functional Theory (DFT), and proposed oxidation mechanism of 1. Based on obtained results, we propose the new nanomaterial as a potent electrochemical modifier, suitable for catalytic treatment and process monitoring of the 1-polluted waters.
T2  - Applied Catalysis B: Environmental
T1  - Design of an ethidium bromide control circuit supported by deep theoretical insight
VL  - 334
SP  - 122819
DO  - 10.1016/j.apcatb.2023.122819
ER  - 

@article{
author = "Vlahović, Filip and Ognjanović, Miloš and Đurđić, Slađana and Kukuruzar, Andrej and Antić, Bratislav and Dojčinović, Biljana and Stanković, Dalibor M.",
year = "2023",
abstract = "We have set-up an electrochemical advanced oxidation process for ethidium bromide (1), based on the Eu-doped MnWO4 (Eu:MnWO4), obtained through a template-driven synthesis, along with developing a suitable monitoring method. Under galvanostatic conditions, Eu:MnWO4-coated graphite electrode serves as anode, applicable for removal of 1. To go further and augment the catalytic method, we have applied a modified carbon paste electrode for the monitoring of 1 with the limit of detection (LOD) of 54 nM. Enhancement of the hydrogen evolution reaction is an indication of electrocatalytic properties of the material, whereby developed method emerges as a candidate for straightforward application in electrochemical advanced oxidation processes (EAOPs). We have enriched experimental data with theoretical insights, provided by Density Functional Theory (DFT), and proposed oxidation mechanism of 1. Based on obtained results, we propose the new nanomaterial as a potent electrochemical modifier, suitable for catalytic treatment and process monitoring of the 1-polluted waters.",
journal = "Applied Catalysis B: Environmental",
title = "Design of an ethidium bromide control circuit supported by deep theoretical insight",
volume = "334",
pages = "122819",
doi = "10.1016/j.apcatb.2023.122819"
}

Vlahović, F., Ognjanović, M., Đurđić, S., Kukuruzar, A., Antić, B., Dojčinović, B.,& Stanković, D. M.. (2023). Design of an ethidium bromide control circuit supported by deep theoretical insight. in Applied Catalysis B: Environmental, 334, 122819.
https://doi.org/10.1016/j.apcatb.2023.122819

Vlahović F, Ognjanović M, Đurđić S, Kukuruzar A, Antić B, Dojčinović B, Stanković DM. Design of an ethidium bromide control circuit supported by deep theoretical insight. in Applied Catalysis B: Environmental. 2023;334:122819.
doi:10.1016/j.apcatb.2023.122819 .

Vlahović, Filip, Ognjanović, Miloš, Đurđić, Slađana, Kukuruzar, Andrej, Antić, Bratislav, Dojčinović, Biljana, Stanković, Dalibor M., "Design of an ethidium bromide control circuit supported by deep theoretical insight" in Applied Catalysis B: Environmental, 334 (2023):122819,
https://doi.org/10.1016/j.apcatb.2023.122819 . .

TY  - JOUR
AU  - Mutić, Tijana
AU  - Ognjanović, Miloš
AU  - Kodranov, Igor
AU  - Robić, Marko
AU  - Savić, Slađana
AU  - Krehula, Stjepko
AU  - Stanković, Dalibor M.
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10737
AB  - In this work, we investigated the morphological and electrochemical properties of gallium/bismuth mixed oxide. The bismuth concentration was varied from 0 to 100%. The correct ratio was determined with inductively coupled plasma-optical emission spectroscopy (ICP-OES), while surface characteristics were determined using scanning electron microscopy (SEM) and X-ray diffraction (XRD) measurement. Electrochemical characteristics were studied using electrochemical impedance spectroscopy (EIS) in the Fe2+/3+ couple. The obtained materials were tested for adrenaline detection. After square wave voltammetry (SWV) optimization, the best electrode showed a wide linear working range from 7 to 100 µM at pH 6 of the Britton–Robinson buffer solution (BRBS) supporting electrolyte. The limit of detection (LOD) for the proposed method was calculated as 1.9 µM, with a limit of quantification (LOQ) of 5.8 µM. The excellent selectivity of the proposed method, with good repeatability and reproducibility, strongly suggests the possible application of the procedure for the determination of adrenaline in artificially prepared real samples. The practical applicability with good recovery values indicates that the morphology of the materials is closely connected with other parameters, which further suggests that the developed approach can offer a low-cost, rapid, selective, and sensitive method for adrenaline monitoring. Graphical abstract: [Figure not available: see fulltext.] © 2023, Springer-Verlag GmbH Germany, part of Springer Nature.
T2  - Analytical and Bioanalytical Chemistry
T1  - The influence of bismuth participation on the morphological and electrochemical characteristics of gallium oxide for the detection of adrenaline
VL  - 415
SP  - 4445
EP  - 4458
DO  - 10.1007/s00216-023-04617-7
ER  - 

@article{
author = "Mutić, Tijana and Ognjanović, Miloš and Kodranov, Igor and Robić, Marko and Savić, Slađana and Krehula, Stjepko and Stanković, Dalibor M.",
year = "2023",
abstract = "In this work, we investigated the morphological and electrochemical properties of gallium/bismuth mixed oxide. The bismuth concentration was varied from 0 to 100%. The correct ratio was determined with inductively coupled plasma-optical emission spectroscopy (ICP-OES), while surface characteristics were determined using scanning electron microscopy (SEM) and X-ray diffraction (XRD) measurement. Electrochemical characteristics were studied using electrochemical impedance spectroscopy (EIS) in the Fe2+/3+ couple. The obtained materials were tested for adrenaline detection. After square wave voltammetry (SWV) optimization, the best electrode showed a wide linear working range from 7 to 100 µM at pH 6 of the Britton–Robinson buffer solution (BRBS) supporting electrolyte. The limit of detection (LOD) for the proposed method was calculated as 1.9 µM, with a limit of quantification (LOQ) of 5.8 µM. The excellent selectivity of the proposed method, with good repeatability and reproducibility, strongly suggests the possible application of the procedure for the determination of adrenaline in artificially prepared real samples. The practical applicability with good recovery values indicates that the morphology of the materials is closely connected with other parameters, which further suggests that the developed approach can offer a low-cost, rapid, selective, and sensitive method for adrenaline monitoring. Graphical abstract: [Figure not available: see fulltext.] © 2023, Springer-Verlag GmbH Germany, part of Springer Nature.",
journal = "Analytical and Bioanalytical Chemistry",
title = "The influence of bismuth participation on the morphological and electrochemical characteristics of gallium oxide for the detection of adrenaline",
volume = "415",
pages = "4445-4458",
doi = "10.1007/s00216-023-04617-7"
}

Mutić, T., Ognjanović, M., Kodranov, I., Robić, M., Savić, S., Krehula, S.,& Stanković, D. M.. (2023). The influence of bismuth participation on the morphological and electrochemical characteristics of gallium oxide for the detection of adrenaline. in Analytical and Bioanalytical Chemistry, 415, 4445-4458.
https://doi.org/10.1007/s00216-023-04617-7

Mutić T, Ognjanović M, Kodranov I, Robić M, Savić S, Krehula S, Stanković DM. The influence of bismuth participation on the morphological and electrochemical characteristics of gallium oxide for the detection of adrenaline. in Analytical and Bioanalytical Chemistry. 2023;415:4445-4458.
doi:10.1007/s00216-023-04617-7 .

Mutić, Tijana, Ognjanović, Miloš, Kodranov, Igor, Robić, Marko, Savić, Slađana, Krehula, Stjepko, Stanković, Dalibor M., "The influence of bismuth participation on the morphological and electrochemical characteristics of gallium oxide for the detection of adrenaline" in Analytical and Bioanalytical Chemistry, 415 (2023):4445-4458,
https://doi.org/10.1007/s00216-023-04617-7 . .

TY  - JOUR
AU  - Knežević, Sara
AU  - Ostojić, Jelena
AU  - Ognjanović, Miloš
AU  - Savić, Slađana
AU  - Kovačević, Aleksandra
AU  - Manojlović, Dragan
AU  - Stanković, Vesna
AU  - Stanković, Dalibor M.
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10468
AB  - Triclosan (TCS) is a polychlorinated phenoxy phenol (PCPPs) used as a disinfectant and a broad-spectrum antibacterial and antifungal agent in personal hygiene products. TCS easily forms diphenyl ethers and dioxins, which are persistent organic pollutants. This work used a double approach for the TSC sensing: a) screen-printed (SPE) electrochemical platform for on-site application, modified with lanthanum iron oxide and graphitic carbon nitride composite (LaFeO3/Fe2O3@g-C3N4/SPE); and b) carbon paste electrode (CPE), modified with the same material and used in laboratory conditions. Linear range from 0.1 μM to 10 μM, the limit of detection (LOD) of 29 nM and the limit of quantification (LOQ) of 91 nM were obtained for CP electrode in BRBS pH 8. SPE showed the best analytical parameters in BRBS at pH 3, with a linear range from 0.3 μM to 7 μM, LOD of 0.09 μM and LOQ of 0.28 μM. Furthermore, the influence of potential interferents was investigated and proven to be negligible. Determination of TSC was performed to estimate the environmental impact of this compound as well as the practical usefulness of the proposed sensor in the real sample analysis, confirmed with a HPLC analysis. © 2022 Elsevier B.V.
T2  - Science of the Total Environment
T1  - The environmentally friendly approaches based on the heterojunction interface of the LaFeO3/Fe2O3@g-C3N4 composite for the disposable and laboratory sensing of triclosan
VL  - 857
DO  - 10.1016/j.scitotenv.2022.159250
ER  - 

@article{
author = "Knežević, Sara and Ostojić, Jelena and Ognjanović, Miloš and Savić, Slađana and Kovačević, Aleksandra and Manojlović, Dragan and Stanković, Vesna and Stanković, Dalibor M.",
year = "2023",
abstract = "Triclosan (TCS) is a polychlorinated phenoxy phenol (PCPPs) used as a disinfectant and a broad-spectrum antibacterial and antifungal agent in personal hygiene products. TCS easily forms diphenyl ethers and dioxins, which are persistent organic pollutants. This work used a double approach for the TSC sensing: a) screen-printed (SPE) electrochemical platform for on-site application, modified with lanthanum iron oxide and graphitic carbon nitride composite (LaFeO3/Fe2O3@g-C3N4/SPE); and b) carbon paste electrode (CPE), modified with the same material and used in laboratory conditions. Linear range from 0.1 μM to 10 μM, the limit of detection (LOD) of 29 nM and the limit of quantification (LOQ) of 91 nM were obtained for CP electrode in BRBS pH 8. SPE showed the best analytical parameters in BRBS at pH 3, with a linear range from 0.3 μM to 7 μM, LOD of 0.09 μM and LOQ of 0.28 μM. Furthermore, the influence of potential interferents was investigated and proven to be negligible. Determination of TSC was performed to estimate the environmental impact of this compound as well as the practical usefulness of the proposed sensor in the real sample analysis, confirmed with a HPLC analysis. © 2022 Elsevier B.V.",
journal = "Science of the Total Environment",
title = "The environmentally friendly approaches based on the heterojunction interface of the LaFeO3/Fe2O3@g-C3N4 composite for the disposable and laboratory sensing of triclosan",
volume = "857",
doi = "10.1016/j.scitotenv.2022.159250"
}

Knežević, S., Ostojić, J., Ognjanović, M., Savić, S., Kovačević, A., Manojlović, D., Stanković, V.,& Stanković, D. M.. (2023). The environmentally friendly approaches based on the heterojunction interface of the LaFeO3/Fe2O3@g-C3N4 composite for the disposable and laboratory sensing of triclosan. in Science of the Total Environment, 857.
https://doi.org/10.1016/j.scitotenv.2022.159250

Knežević S, Ostojić J, Ognjanović M, Savić S, Kovačević A, Manojlović D, Stanković V, Stanković DM. The environmentally friendly approaches based on the heterojunction interface of the LaFeO3/Fe2O3@g-C3N4 composite for the disposable and laboratory sensing of triclosan. in Science of the Total Environment. 2023;857.
doi:10.1016/j.scitotenv.2022.159250 .

Knežević, Sara, Ostojić, Jelena, Ognjanović, Miloš, Savić, Slađana, Kovačević, Aleksandra, Manojlović, Dragan, Stanković, Vesna, Stanković, Dalibor M., "The environmentally friendly approaches based on the heterojunction interface of the LaFeO3/Fe2O3@g-C3N4 composite for the disposable and laboratory sensing of triclosan" in Science of the Total Environment, 857 (2023),
https://doi.org/10.1016/j.scitotenv.2022.159250 . .

TY  - JOUR
AU  - Marković, Aleksandar
AU  - Savić, Slađana
AU  - Kukuruzar, Andrej J.
AU  - Konya, Zoltan
AU  - Manojlović, Dragan D.
AU  - Ognjanović, Miloš
AU  - Stanković, Dalibor M.
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10689
AB  - In this paper, electrochemical degradation of Reactive Black 5 (RB5) textile azo dye was examined in regard to different synthesis procedures for making PbO2–graphitic carbon nitride (g-C3N4) electrode. The reaction of with ClO− in the presence of different surfactants, i.e., cetyltrimethylammonium bromide (CTAB) and tetrabutylammonium phosphate (TBAP), under conventional conditions, resulted in the formation of PbO2 with varying morphology. The obtained materials were combined with g-C3N4 for the preparation of the final composite materials, which were then characterized morphologically and electrochemically. After optimizing the degradation method, it was shown that an anode comprising a steel electrode coated with the composite of PbO2 synthesized using CTAB as template and g-C3N4, and using 0.15 M Na2SO4 as the supporting electrolyte, gave the best performance for RB5 dye removal from a 35 mg/L solution. The treatment duration was 60 min, applying a current of 0.17 A (electrode surface 4 cm2, current density of 42.5 mA/cm2), while the initial pH of the testing solution was 2. The reusability and longevity of the electrode surface (which showed no significant change in activity throughout the study) may suggest that this approach is a promising candidate for wastewater treatment and pollutant removal.
T2  - Catalysts
T1  - Differently prepared PbO2/graphitic carbon nitride composites for efficient electrochemical removal of Reactive Black 5 dye
VL  - 13
IS  - 2
SP  - 328
DO  - 10.3390/catal13020328
ER  - 

@article{
author = "Marković, Aleksandar and Savić, Slađana and Kukuruzar, Andrej J. and Konya, Zoltan and Manojlović, Dragan D. and Ognjanović, Miloš and Stanković, Dalibor M.",
year = "2023",
abstract = "In this paper, electrochemical degradation of Reactive Black 5 (RB5) textile azo dye was examined in regard to different synthesis procedures for making PbO2–graphitic carbon nitride (g-C3N4) electrode. The reaction of with ClO− in the presence of different surfactants, i.e., cetyltrimethylammonium bromide (CTAB) and tetrabutylammonium phosphate (TBAP), under conventional conditions, resulted in the formation of PbO2 with varying morphology. The obtained materials were combined with g-C3N4 for the preparation of the final composite materials, which were then characterized morphologically and electrochemically. After optimizing the degradation method, it was shown that an anode comprising a steel electrode coated with the composite of PbO2 synthesized using CTAB as template and g-C3N4, and using 0.15 M Na2SO4 as the supporting electrolyte, gave the best performance for RB5 dye removal from a 35 mg/L solution. The treatment duration was 60 min, applying a current of 0.17 A (electrode surface 4 cm2, current density of 42.5 mA/cm2), while the initial pH of the testing solution was 2. The reusability and longevity of the electrode surface (which showed no significant change in activity throughout the study) may suggest that this approach is a promising candidate for wastewater treatment and pollutant removal.",
journal = "Catalysts",
title = "Differently prepared PbO2/graphitic carbon nitride composites for efficient electrochemical removal of Reactive Black 5 dye",
volume = "13",
number = "2",
pages = "328",
doi = "10.3390/catal13020328"
}

Marković, A., Savić, S., Kukuruzar, A. J., Konya, Z., Manojlović, D. D., Ognjanović, M.,& Stanković, D. M.. (2023). Differently prepared PbO2/graphitic carbon nitride composites for efficient electrochemical removal of Reactive Black 5 dye. in Catalysts, 13(2), 328.
https://doi.org/10.3390/catal13020328

Marković A, Savić S, Kukuruzar AJ, Konya Z, Manojlović DD, Ognjanović M, Stanković DM. Differently prepared PbO2/graphitic carbon nitride composites for efficient electrochemical removal of Reactive Black 5 dye. in Catalysts. 2023;13(2):328.
doi:10.3390/catal13020328 .

Marković, Aleksandar, Savić, Slađana, Kukuruzar, Andrej J., Konya, Zoltan, Manojlović, Dragan D., Ognjanović, Miloš, Stanković, Dalibor M., "Differently prepared PbO2/graphitic carbon nitride composites for efficient electrochemical removal of Reactive Black 5 dye" in Catalysts, 13, no. 2 (2023):328,
https://doi.org/10.3390/catal13020328 . .