TY  - JOUR
AU  - Padilla, Luis
AU  - Stojilovic, Nenad
AU  - Grujić-Brojčin, Mirjana
AU  - Šćepanović, Maja
AU  - Tomic, Natasa
AU  - Simović, Bojana
AU  - Potratz, Gregory
AU  - Gopalakrishnan, Gokul
PY  - 2023
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1982
AB  - Non-woven fibers were produced by sol-gel and electrospinning methods, from a solution containing cerium nitrate, zinc acetate, titanium isopropoxide, polyvinylpyrrolidone, acetic acid, ethanol, and water. The fibers were calcined at various temperatures ranging from 300 to 900 °C and were characterized using Scanning Electron Microscopy (SEM), X-Ray diffraction (XRD), Brunauer-Emmett-Teller (BET) surface area analysis, Energy Dispersive X-ray (EDX), Raman spectroscopy, Thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). Structural characterization revealed the fluorite nanocrystalline phase of ceria (CeO2) at all temperatures, the wurtzite zinc oxide (ZnO) phase in the 300–500 °C range, and a variety of zinc titanate phases (such as ZnTiO3, Zn2Ti3O8 and Zn2TiO4) at higher temperatures. Titania (TiO2) phases were not observed following calcination up to 900 °C. The average ceria nanocrystallite size increases with calcination temperature, as revealed by XRD and confirmed by the Phonon Confinement Model (PCM) of Raman spectra. The opposite trend is observed for the BET specific surface area of the nanofibers, where this value decreases with calcination temperatures above 400 °C. These nanofibers containing ceria and zinc titanates are potential candidates for photocatalytic applications.
PB  - Elsevier Ltd
T2  - Journal of Physics and Chemistry of Solids
T1  - Composite nanofibers electrospun from cerium, titanium, and zinc precursors
SP  - 111410
VL  - 179
DO  - 10.1016/j.jpcs.2023.111410
ER  - 

@article{
author = "Padilla, Luis and Stojilovic, Nenad and Grujić-Brojčin, Mirjana and Šćepanović, Maja and Tomic, Natasa and Simović, Bojana and Potratz, Gregory and Gopalakrishnan, Gokul",
year = "2023",
abstract = "Non-woven fibers were produced by sol-gel and electrospinning methods, from a solution containing cerium nitrate, zinc acetate, titanium isopropoxide, polyvinylpyrrolidone, acetic acid, ethanol, and water. The fibers were calcined at various temperatures ranging from 300 to 900 °C and were characterized using Scanning Electron Microscopy (SEM), X-Ray diffraction (XRD), Brunauer-Emmett-Teller (BET) surface area analysis, Energy Dispersive X-ray (EDX), Raman spectroscopy, Thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). Structural characterization revealed the fluorite nanocrystalline phase of ceria (CeO2) at all temperatures, the wurtzite zinc oxide (ZnO) phase in the 300–500 °C range, and a variety of zinc titanate phases (such as ZnTiO3, Zn2Ti3O8 and Zn2TiO4) at higher temperatures. Titania (TiO2) phases were not observed following calcination up to 900 °C. The average ceria nanocrystallite size increases with calcination temperature, as revealed by XRD and confirmed by the Phonon Confinement Model (PCM) of Raman spectra. The opposite trend is observed for the BET specific surface area of the nanofibers, where this value decreases with calcination temperatures above 400 °C. These nanofibers containing ceria and zinc titanates are potential candidates for photocatalytic applications.",
publisher = "Elsevier Ltd",
journal = "Journal of Physics and Chemistry of Solids",
title = "Composite nanofibers electrospun from cerium, titanium, and zinc precursors",
pages = "111410",
volume = "179",
doi = "10.1016/j.jpcs.2023.111410"
}

Padilla, L., Stojilovic, N., Grujić-Brojčin, M., Šćepanović, M., Tomic, N., Simović, B., Potratz, G.,& Gopalakrishnan, G.. (2023). Composite nanofibers electrospun from cerium, titanium, and zinc precursors. in Journal of Physics and Chemistry of Solids
Elsevier Ltd., 179, 111410.
https://doi.org/10.1016/j.jpcs.2023.111410

Padilla L, Stojilovic N, Grujić-Brojčin M, Šćepanović M, Tomic N, Simović B, Potratz G, Gopalakrishnan G. Composite nanofibers electrospun from cerium, titanium, and zinc precursors. in Journal of Physics and Chemistry of Solids. 2023;179:111410.
doi:10.1016/j.jpcs.2023.111410 .

Padilla, Luis, Stojilovic, Nenad, Grujić-Brojčin, Mirjana, Šćepanović, Maja, Tomic, Natasa, Simović, Bojana, Potratz, Gregory, Gopalakrishnan, Gokul, "Composite nanofibers electrospun from cerium, titanium, and zinc precursors" in Journal of Physics and Chemistry of Solids, 179 (2023):111410,
https://doi.org/10.1016/j.jpcs.2023.111410 . .

TY  - JOUR
AU  - Armaković,Sanja J.
AU  - Jovanoski Kostić,Aleksandra
AU  - Bilić,Andrijana
AU  - Savanović,Maria M.
AU  - Tomić,Nataša
AU  - Kremenović,Aleksandar
AU  - Šćepanović,Maja
AU  - Grujić-Brojčin,Mirjana
AU  - Ćirković, Jovana
AU  - Armaković,Stevan
PY  - 2023
AB  - Due to the inability of conventional wastewater treatment procedures to remove organic
pharmaceutical pollutants, active pharmaceutical components remain in wastewater and even reach
tap water. In terms of pharmaceutical pollutants, the scientific community focuses on  -blockers due
to their extensive (over)usage and moderately high solubility. In this study, the photocatalytic activity
of V2O5 was investigated through the degradation of nadolol (NAD), pindolol (PIN), metoprolol
(MET), and their mixture under ultraviolet (UV) irradiation in water. For the preparation of V2O5,
facile hydrothermal synthesis was used. The structural, morphological, and surface properties
and purity of synthesized V2O5 powder were investigated by scanning electron microscopy (SEM),
X-ray, and Raman spectroscopy. SEM micrographs showed hexagonal-shaped platelets with welldefined
morphology of materials with diameters in the range of 10–65 μm and thickness of around
a few microns. X-ray diffraction identified only one crystalline phase in the sample. The Raman
scattering measurements taken on the catalyst confirmed the result of XRPD. Degradation kinetics
were monitored by ultra-fast liquid chromatography with diode array detection. The results showed
that in individual solutions, photocatalytic degradation of MET and NAD was relatively insignificant
(<10%). However, in the PIN case, the degradation was significant (64%). In the mixture, the
photodegradation efficiency of MET and NAD slightly increased (15% and 13%). Conversely, it
reduced the PIN to the still satisfactory value of 40%. Computational analysis based on molecular and
periodic density functional theory calculations was used to complement our experimental findings.
Calculations of the average local ionization energy indicate that the PIN is the most reactive of all
three considered molecules in terms of removing an electron from it.
PB  - MDPI
T2  - Molecules
T1  - Photocatalytic Activity of the V2O5 Catalyst toward Selected
Pharmaceuticals and Their Mixture: Influence of the Molecular
Structure on the Efficiency of the Process
EP  - 18
SP  - 1
VL  - 28
DO  - 10.3390/molecules28020655
ER  - 

@article{
author = "Armaković,Sanja J. and Jovanoski Kostić,Aleksandra and Bilić,Andrijana and Savanović,Maria M. and Tomić,Nataša and Kremenović,Aleksandar and Šćepanović,Maja and Grujić-Brojčin,Mirjana and Ćirković, Jovana and Armaković,Stevan",
year = "2023",
abstract = "Due to the inability of conventional wastewater treatment procedures to remove organic
pharmaceutical pollutants, active pharmaceutical components remain in wastewater and even reach
tap water. In terms of pharmaceutical pollutants, the scientific community focuses on  -blockers due
to their extensive (over)usage and moderately high solubility. In this study, the photocatalytic activity
of V2O5 was investigated through the degradation of nadolol (NAD), pindolol (PIN), metoprolol
(MET), and their mixture under ultraviolet (UV) irradiation in water. For the preparation of V2O5,
facile hydrothermal synthesis was used. The structural, morphological, and surface properties
and purity of synthesized V2O5 powder were investigated by scanning electron microscopy (SEM),
X-ray, and Raman spectroscopy. SEM micrographs showed hexagonal-shaped platelets with welldefined
morphology of materials with diameters in the range of 10–65 μm and thickness of around
a few microns. X-ray diffraction identified only one crystalline phase in the sample. The Raman
scattering measurements taken on the catalyst confirmed the result of XRPD. Degradation kinetics
were monitored by ultra-fast liquid chromatography with diode array detection. The results showed
that in individual solutions, photocatalytic degradation of MET and NAD was relatively insignificant
(<10%). However, in the PIN case, the degradation was significant (64%). In the mixture, the
photodegradation efficiency of MET and NAD slightly increased (15% and 13%). Conversely, it
reduced the PIN to the still satisfactory value of 40%. Computational analysis based on molecular and
periodic density functional theory calculations was used to complement our experimental findings.
Calculations of the average local ionization energy indicate that the PIN is the most reactive of all
three considered molecules in terms of removing an electron from it.",
publisher = "MDPI",
journal = "Molecules",
title = "Photocatalytic Activity of the V2O5 Catalyst toward Selected
Pharmaceuticals and Their Mixture: Influence of the Molecular
Structure on the Efficiency of the Process",
pages = "18-1",
volume = "28",
doi = "10.3390/molecules28020655"
}

Armaković, S. J., Jovanoski Kostić, A., Bilić, A., Savanović, M. M., Tomić, N., Kremenović, A., Šćepanović, M., Grujić-Brojčin, M., Ćirković, J.,& Armaković, S.. (2023). Photocatalytic Activity of the V2O5 Catalyst toward Selected
Pharmaceuticals and Their Mixture: Influence of the Molecular
Structure on the Efficiency of the Process. in Molecules
MDPI., 28, 1-18.
https://doi.org/10.3390/molecules28020655

Armaković SJ, Jovanoski Kostić A, Bilić A, Savanović MM, Tomić N, Kremenović A, Šćepanović M, Grujić-Brojčin M, Ćirković J, Armaković S. Photocatalytic Activity of the V2O5 Catalyst toward Selected
Pharmaceuticals and Their Mixture: Influence of the Molecular
Structure on the Efficiency of the Process. in Molecules. 2023;28:1-18.
doi:10.3390/molecules28020655 .

Armaković,Sanja J., Jovanoski Kostić,Aleksandra, Bilić,Andrijana, Savanović,Maria M., Tomić,Nataša, Kremenović,Aleksandar, Šćepanović,Maja, Grujić-Brojčin,Mirjana, Ćirković, Jovana, Armaković,Stevan, "Photocatalytic Activity of the V2O5 Catalyst toward Selected
Pharmaceuticals and Their Mixture: Influence of the Molecular
Structure on the Efficiency of the Process" in Molecules, 28 (2023):1-18,
https://doi.org/10.3390/molecules28020655 . .