TY  - JOUR
AU  - Kovačević, Marija
AU  - Živković, Sanja
AU  - Ognjanović, Miloš
AU  - Momčilović, Miloš
AU  - Relić, Dubravka
AU  - Vasić Anićijević, Dragana
PY  - 2023
UR  - http://cherry.chem.bg.ac.rs/handle/123456789/6328
AB  - (1) Background: An increasing use of pharmaceutics imposes a need for the permanent development of efficient strategies, including the tailoring of highly specific new materials for their removal from the environment. Photocatalytic degradation has been the subject of increasing interest of the researchers in the field. (2) Methods: This paper is focused on the investigation of the possibility to deposit a thin metal layer on a TiO2 surface and study its photocatalytic performance for the degradation of ciprofloxacin using a combination of theoretical and experimental methods. (3) Results: Based on the extensive DFT screening of 24 d-metals’ adhesion on TiO2, Cu was selected for further work, due to the satisfactory expected stability and good availability. The (Cu)TiO2 was successfully synthesized and characterized with XRD, SEM+EDS and UV-Vis spectrophotometry. The uniformly distributed copper on the TiO2 surface corresponds to the binding on high-affinity oxygen-rich sites, as proposed with DFT calculations. The photocatalytic degradation rate of ciprofloxacin was improved by about a factor of 1.5 compared to the bare non-modified TiO2. (4) Conclusions: The observed result was ascribed to the ability of adsorbed Cu to impede the agglomeration of TiO2 and increase the active catalytic area, and bandgap narrowing predicted with DFT calculations.
T2  - Materials
T1  - In Silico Guided Design of Metal/Semiconductor Photocatalysts: A Case of Cu-Modified TiO2 for Ciprofloxacin Degradation
VL  - 16
IS  - 16
SP  - 5708
DO  - 10.3390/ma16165708
ER  - 

@article{
author = "Kovačević, Marija and Živković, Sanja and Ognjanović, Miloš and Momčilović, Miloš and Relić, Dubravka and Vasić Anićijević, Dragana",
year = "2023",
abstract = "(1) Background: An increasing use of pharmaceutics imposes a need for the permanent development of efficient strategies, including the tailoring of highly specific new materials for their removal from the environment. Photocatalytic degradation has been the subject of increasing interest of the researchers in the field. (2) Methods: This paper is focused on the investigation of the possibility to deposit a thin metal layer on a TiO2 surface and study its photocatalytic performance for the degradation of ciprofloxacin using a combination of theoretical and experimental methods. (3) Results: Based on the extensive DFT screening of 24 d-metals’ adhesion on TiO2, Cu was selected for further work, due to the satisfactory expected stability and good availability. The (Cu)TiO2 was successfully synthesized and characterized with XRD, SEM+EDS and UV-Vis spectrophotometry. The uniformly distributed copper on the TiO2 surface corresponds to the binding on high-affinity oxygen-rich sites, as proposed with DFT calculations. The photocatalytic degradation rate of ciprofloxacin was improved by about a factor of 1.5 compared to the bare non-modified TiO2. (4) Conclusions: The observed result was ascribed to the ability of adsorbed Cu to impede the agglomeration of TiO2 and increase the active catalytic area, and bandgap narrowing predicted with DFT calculations.",
journal = "Materials",
title = "In Silico Guided Design of Metal/Semiconductor Photocatalysts: A Case of Cu-Modified TiO2 for Ciprofloxacin Degradation",
volume = "16",
number = "16",
pages = "5708",
doi = "10.3390/ma16165708"
}

Kovačević, M., Živković, S., Ognjanović, M., Momčilović, M., Relić, D.,& Vasić Anićijević, D.. (2023). In Silico Guided Design of Metal/Semiconductor Photocatalysts: A Case of Cu-Modified TiO2 for Ciprofloxacin Degradation. in Materials, 16(16), 5708.
https://doi.org/10.3390/ma16165708

Kovačević M, Živković S, Ognjanović M, Momčilović M, Relić D, Vasić Anićijević D. In Silico Guided Design of Metal/Semiconductor Photocatalysts: A Case of Cu-Modified TiO2 for Ciprofloxacin Degradation. in Materials. 2023;16(16):5708.
doi:10.3390/ma16165708 .

Kovačević, Marija, Živković, Sanja, Ognjanović, Miloš, Momčilović, Miloš, Relić, Dubravka, Vasić Anićijević, Dragana, "In Silico Guided Design of Metal/Semiconductor Photocatalysts: A Case of Cu-Modified TiO2 for Ciprofloxacin Degradation" in Materials, 16, no. 16 (2023):5708,
https://doi.org/10.3390/ma16165708 . .

TY  - JOUR
AU  - Pavlović, Marija
AU  - Šokarda Slavić, Marinela
AU  - Ristović, Marina
AU  - Stojanović, Sanja
AU  - Margetić, Aleksandra
AU  - Momčilović, Miloš
AU  - Vujčić, Zoran
PY  - 2023
UR  - http://cherry.chem.bg.ac.rs/handle/123456789/6321
AB  - The main goal of this study was to examine the efficiency of a newly isolated fungus from quince, Aspergillus tubingensis FAT43, to produce the pectinolytic complex using agricultural and industrial waste as the substrate for solid state fermentation. Sugar beet pulp was the most effective substrate inducer of pectinolytic complex synthesis out of all the waste residues examined. For endo-pectinolytic and total pectinolytic activity, respectively, statistical optimization using Placked-Burman Design and Optimal (Custom) Design increased production by 2.22 and 2.15-fold, respectively. Liquification, clarification, and an increase in the amount of reducing sugar in fruit juices (apple, banana, apricot, orange, and quince) processed with pectinolytic complex were identified. Enzymatic pre-treatment considerably increases yield (14%–22%) and clarification (90%). After enzymatic treatment, the best liquefaction was observed in orange juice, whereas the best clarification was obtained in apricot juice. Additionally, the pectinolytic treatment of apricot juice resulted in the highest increase in reducing sugar concentration (11%) compared to all other enzymatically treated juices. Optimizing the production of a highly active pectinolytic complex and its efficient utilization in the processing of fruit juices, including the generation of an increasing amount of waste, are the significant outcomes of this research.
PB  - Oxford University Press
T2  - Letters in Applied Microbiology
T1  - Optimization of solid-state fermentation for enhanced production of pectinolytic complex by Aspergillus tubingensis FAT43 and its application in fruit juice processing
VL  - 76
IS  - 8
SP  - ovad083
DO  - 10.1093/lambio/ovad083
ER  - 

@article{
author = "Pavlović, Marija and Šokarda Slavić, Marinela and Ristović, Marina and Stojanović, Sanja and Margetić, Aleksandra and Momčilović, Miloš and Vujčić, Zoran",
year = "2023",
abstract = "The main goal of this study was to examine the efficiency of a newly isolated fungus from quince, Aspergillus tubingensis FAT43, to produce the pectinolytic complex using agricultural and industrial waste as the substrate for solid state fermentation. Sugar beet pulp was the most effective substrate inducer of pectinolytic complex synthesis out of all the waste residues examined. For endo-pectinolytic and total pectinolytic activity, respectively, statistical optimization using Placked-Burman Design and Optimal (Custom) Design increased production by 2.22 and 2.15-fold, respectively. Liquification, clarification, and an increase in the amount of reducing sugar in fruit juices (apple, banana, apricot, orange, and quince) processed with pectinolytic complex were identified. Enzymatic pre-treatment considerably increases yield (14%–22%) and clarification (90%). After enzymatic treatment, the best liquefaction was observed in orange juice, whereas the best clarification was obtained in apricot juice. Additionally, the pectinolytic treatment of apricot juice resulted in the highest increase in reducing sugar concentration (11%) compared to all other enzymatically treated juices. Optimizing the production of a highly active pectinolytic complex and its efficient utilization in the processing of fruit juices, including the generation of an increasing amount of waste, are the significant outcomes of this research.",
publisher = "Oxford University Press",
journal = "Letters in Applied Microbiology",
title = "Optimization of solid-state fermentation for enhanced production of pectinolytic complex by Aspergillus tubingensis FAT43 and its application in fruit juice processing",
volume = "76",
number = "8",
pages = "ovad083",
doi = "10.1093/lambio/ovad083"
}

Pavlović, M., Šokarda Slavić, M., Ristović, M., Stojanović, S., Margetić, A., Momčilović, M.,& Vujčić, Z.. (2023). Optimization of solid-state fermentation for enhanced production of pectinolytic complex by Aspergillus tubingensis FAT43 and its application in fruit juice processing. in Letters in Applied Microbiology
Oxford University Press., 76(8), ovad083.
https://doi.org/10.1093/lambio/ovad083

Pavlović M, Šokarda Slavić M, Ristović M, Stojanović S, Margetić A, Momčilović M, Vujčić Z. Optimization of solid-state fermentation for enhanced production of pectinolytic complex by Aspergillus tubingensis FAT43 and its application in fruit juice processing. in Letters in Applied Microbiology. 2023;76(8):ovad083.
doi:10.1093/lambio/ovad083 .

Pavlović, Marija, Šokarda Slavić, Marinela, Ristović, Marina, Stojanović, Sanja, Margetić, Aleksandra, Momčilović, Miloš, Vujčić, Zoran, "Optimization of solid-state fermentation for enhanced production of pectinolytic complex by Aspergillus tubingensis FAT43 and its application in fruit juice processing" in Letters in Applied Microbiology, 76, no. 8 (2023):ovad083,
https://doi.org/10.1093/lambio/ovad083 . .

TY  - JOUR
AU  - Radenković, Marina
AU  - Momčilović, Miloš
AU  - Petrović, Jelena
AU  - Mraković, Ana
AU  - Relić, Dubravka
AU  - Popović, Aleksandar R.
AU  - Živković, Sanja
PY  - 2022
UR  - http://cherry.chem.bg.ac.rs/handle/123456789/5663
AB  - Presented research aimed to develop an alternative approach for the estimation of biosorption capability of sunflower husk. The acid-pretreated sunflower biomass was characterized by scanning electron microscopy combined with energy dispersive X-Ray spectroscopy (SEM-EDX) analysis and Fourier transform infrared (FTIR) spectroscopy. Biosorption efficiency has been evaluated using inductively coupled plasma optical emission spectroscopy (ICP-OES) and laser-induced breakdown spectroscopy (LIBS). The adsorption capacity of the adsorbent was determined as the function of the pH of the solution, the initial concentration of heavy metal solutions, and contact time. The optimal conditions were achieved after 15 min of contact at pH 6, while the percentage of the removal was from 80.0–98.7 %, depending on the element. The results obtained from the kinetic and isotherm studies show that maximum adsorption of ions was quickly reached and followed the pseudo-second-order kinetic model. Real samples were tested and obtained Ni values by LIBS method were 3100±200 and 1240±100 mg kg-1, while estimated values by the ICP-OES were 2995±20 and 1130±10 mg kg-1, respectively. The obtained results prove that LIBS method can be used as a “green alternative“for the evaluation of biosorption efficiency.
PB  - Serbian Chemical Society
T2  - Journal of the Serbian Chemical Society
T1  - Removal of heavy metals from aqueous media by sunflower husk: A comparative study of biosorption efficiency by using ICP-OES and LIBS
VL  - 87
IS  - 7-8
SP  - 939
EP  - 952
DO  - 10.2298/JSC220105022R
ER  - 

@article{
author = "Radenković, Marina and Momčilović, Miloš and Petrović, Jelena and Mraković, Ana and Relić, Dubravka and Popović, Aleksandar R. and Živković, Sanja",
year = "2022",
abstract = "Presented research aimed to develop an alternative approach for the estimation of biosorption capability of sunflower husk. The acid-pretreated sunflower biomass was characterized by scanning electron microscopy combined with energy dispersive X-Ray spectroscopy (SEM-EDX) analysis and Fourier transform infrared (FTIR) spectroscopy. Biosorption efficiency has been evaluated using inductively coupled plasma optical emission spectroscopy (ICP-OES) and laser-induced breakdown spectroscopy (LIBS). The adsorption capacity of the adsorbent was determined as the function of the pH of the solution, the initial concentration of heavy metal solutions, and contact time. The optimal conditions were achieved after 15 min of contact at pH 6, while the percentage of the removal was from 80.0–98.7 %, depending on the element. The results obtained from the kinetic and isotherm studies show that maximum adsorption of ions was quickly reached and followed the pseudo-second-order kinetic model. Real samples were tested and obtained Ni values by LIBS method were 3100±200 and 1240±100 mg kg-1, while estimated values by the ICP-OES were 2995±20 and 1130±10 mg kg-1, respectively. The obtained results prove that LIBS method can be used as a “green alternative“for the evaluation of biosorption efficiency.",
publisher = "Serbian Chemical Society",
journal = "Journal of the Serbian Chemical Society",
title = "Removal of heavy metals from aqueous media by sunflower husk: A comparative study of biosorption efficiency by using ICP-OES and LIBS",
volume = "87",
number = "7-8",
pages = "939-952",
doi = "10.2298/JSC220105022R"
}

Radenković, M., Momčilović, M., Petrović, J., Mraković, A., Relić, D., Popović, A. R.,& Živković, S.. (2022). Removal of heavy metals from aqueous media by sunflower husk: A comparative study of biosorption efficiency by using ICP-OES and LIBS. in Journal of the Serbian Chemical Society
Serbian Chemical Society., 87(7-8), 939-952.
https://doi.org/10.2298/JSC220105022R

Radenković M, Momčilović M, Petrović J, Mraković A, Relić D, Popović AR, Živković S. Removal of heavy metals from aqueous media by sunflower husk: A comparative study of biosorption efficiency by using ICP-OES and LIBS. in Journal of the Serbian Chemical Society. 2022;87(7-8):939-952.
doi:10.2298/JSC220105022R .

Radenković, Marina, Momčilović, Miloš, Petrović, Jelena, Mraković, Ana, Relić, Dubravka, Popović, Aleksandar R., Živković, Sanja, "Removal of heavy metals from aqueous media by sunflower husk: A comparative study of biosorption efficiency by using ICP-OES and LIBS" in Journal of the Serbian Chemical Society, 87, no. 7-8 (2022):939-952,
https://doi.org/10.2298/JSC220105022R . .

TY  - JOUR
AU  - Živković, Sanja
AU  - Momčilović, Miloš
AU  - Staicu, Angela
AU  - Mutić, Jelena
AU  - Trtica, Milan
AU  - Savovic, Jelena
PY  - 2017
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/2413
AB  - The aim of this study was to develop a simple laser induced breakdown spectroscopy (LIBS) method for quantitative elemental analysis of powdered biological materials based on laboratory prepared calibration samples. The analysis was done using ungated single pulse LIBS in ambient air at atmospheric pressure. Transversely-Excited Atmospheric pressure (TEA) CO2 laser was used as an energy source for plasma generation on samples. The material used for the analysis was a blue-green alga Spirulina, widely used in food and pharmaceutical industries and also in a few biotechnological applications. To demonstrate the analytical potential of this particular LIBS system the obtained spectra were compared to the spectra obtained using a commercial LIBS system based on pulsed Nd:YAG laser. A single sample of known concentration was used to estimate detection limits for Ba, Ca, Fe, Mg, Mn, Si and Sr and compare detection power of these two LIES systems. TEA CO2 laser based LIES was also applied for quantitative analysis of the elements in powder Spirulina samples. Analytical curves for Ba, Fe, Mg, Mn and Sr were constructed using laboratory produced matrix-matched calibration samples. Inductively coupled plasma optical emission spectroscopy (ICP-OES) was used as the reference technique for elemental quantification, and reasonably well agreement between ICP and LIBS data was obtained. Results confirm that, in respect to its sensitivity and precision, TEA CO2 laser based LIBS can be successfully applied for quantitative analysis of macro and micro-elements in algal samples. The fact that nearly all classes of materials can be prepared as powders implies that the proposed method could be easily extended to a quantitative analysis of different kinds of materials, organic, biological or inorganic. (C) 2017 Elsevier B.V. All rights reserved.
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - Spectrochimica Acta. Part B: Atomic Spectroscopy
T1  - Spectrochemical analysis of powdered biological samples using transversely excited atmospheric carbon dioxide laser plasma excitation
VL  - 128
SP  - 22
EP  - 29
DO  - 10.1016/j.sab.2016.12.009
ER  - 

@article{
author = "Živković, Sanja and Momčilović, Miloš and Staicu, Angela and Mutić, Jelena and Trtica, Milan and Savovic, Jelena",
year = "2017",
abstract = "The aim of this study was to develop a simple laser induced breakdown spectroscopy (LIBS) method for quantitative elemental analysis of powdered biological materials based on laboratory prepared calibration samples. The analysis was done using ungated single pulse LIBS in ambient air at atmospheric pressure. Transversely-Excited Atmospheric pressure (TEA) CO2 laser was used as an energy source for plasma generation on samples. The material used for the analysis was a blue-green alga Spirulina, widely used in food and pharmaceutical industries and also in a few biotechnological applications. To demonstrate the analytical potential of this particular LIBS system the obtained spectra were compared to the spectra obtained using a commercial LIBS system based on pulsed Nd:YAG laser. A single sample of known concentration was used to estimate detection limits for Ba, Ca, Fe, Mg, Mn, Si and Sr and compare detection power of these two LIES systems. TEA CO2 laser based LIES was also applied for quantitative analysis of the elements in powder Spirulina samples. Analytical curves for Ba, Fe, Mg, Mn and Sr were constructed using laboratory produced matrix-matched calibration samples. Inductively coupled plasma optical emission spectroscopy (ICP-OES) was used as the reference technique for elemental quantification, and reasonably well agreement between ICP and LIBS data was obtained. Results confirm that, in respect to its sensitivity and precision, TEA CO2 laser based LIBS can be successfully applied for quantitative analysis of macro and micro-elements in algal samples. The fact that nearly all classes of materials can be prepared as powders implies that the proposed method could be easily extended to a quantitative analysis of different kinds of materials, organic, biological or inorganic. (C) 2017 Elsevier B.V. All rights reserved.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "Spectrochimica Acta. Part B: Atomic Spectroscopy",
title = "Spectrochemical analysis of powdered biological samples using transversely excited atmospheric carbon dioxide laser plasma excitation",
volume = "128",
pages = "22-29",
doi = "10.1016/j.sab.2016.12.009"
}

Živković, S., Momčilović, M., Staicu, A., Mutić, J., Trtica, M.,& Savovic, J.. (2017). Spectrochemical analysis of powdered biological samples using transversely excited atmospheric carbon dioxide laser plasma excitation. in Spectrochimica Acta. Part B: Atomic Spectroscopy
Pergamon-Elsevier Science Ltd, Oxford., 128, 22-29.
https://doi.org/10.1016/j.sab.2016.12.009

Živković S, Momčilović M, Staicu A, Mutić J, Trtica M, Savovic J. Spectrochemical analysis of powdered biological samples using transversely excited atmospheric carbon dioxide laser plasma excitation. in Spectrochimica Acta. Part B: Atomic Spectroscopy. 2017;128:22-29.
doi:10.1016/j.sab.2016.12.009 .

Živković, Sanja, Momčilović, Miloš, Staicu, Angela, Mutić, Jelena, Trtica, Milan, Savovic, Jelena, "Spectrochemical analysis of powdered biological samples using transversely excited atmospheric carbon dioxide laser plasma excitation" in Spectrochimica Acta. Part B: Atomic Spectroscopy, 128 (2017):22-29,
https://doi.org/10.1016/j.sab.2016.12.009 . .

TY  - JOUR
AU  - Živković, Sanja
AU  - Savovic, J.
AU  - Trtica, M.
AU  - Mutić, Jelena
AU  - Momčilović, Miloš
PY  - 2017
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/2412
AB  - The applicability of nanosecond infrared Transversely Excited Atmospheric (TEA) CO2 laser induced plasma for spectrochemical analysis of aluminum alloys was investigated. The plasma was generated by focusing a pulsed TEA CO2 laser that emits at 10.6 mu m on the Al target in ambient air at atmospheric pressure. The temporal profile of the laser pulse is composed of a 100 ns peak followed by a slowly decaying tail of about 2 mu s. The output pulse energy was approximately 160 mJ, thus the peak output power was estimated to be around 1.6 MW. Time-Integrated Space-Resolved Laser Induced Breakdown Spectroscopy (TISR-LIBS) was employed to obtain the emission spectra. The maximum intensity of emission, with sharp and well resolved spectral lines that were almost free of the background continuum, was obtained from plasma region 2 mm from the target surface. Linear calibration curves for Mg, Cr, Cu and Fe were obtained using aluminum alloy spectrochemical standards. The limits of detection for the investigated elements were in the 2-73 ppm range. Inductively Coupled Plasma Optical Emission Spectroscopy (ICP-OES) was used as a reference technique to estimate the accuracy of LIBS determination by use of control samples with known compositions. Comparison of the obtained results with those available in the literature confirms that LIBS system based on TEA CO2 laser, in combination with TISR spectral measurements, can be successfully applied to qualitative and quantitative determinations of minor elements in aluminum based alloys. (C) 2017 Elsevier B.V. All rights reserved.
PB  - Elsevier Science Sa, Lausanne
T2  - Journal of Alloys and Compounds
T1  - Elemental analysis of aluminum alloys by Laser Induced Breakdown Spectroscopy based on TEA CO2 laser
VL  - 700
SP  - 175
EP  - 184
DO  - 10.1016/j.jallcom.2017.01.060
ER  - 

@article{
author = "Živković, Sanja and Savovic, J. and Trtica, M. and Mutić, Jelena and Momčilović, Miloš",
year = "2017",
abstract = "The applicability of nanosecond infrared Transversely Excited Atmospheric (TEA) CO2 laser induced plasma for spectrochemical analysis of aluminum alloys was investigated. The plasma was generated by focusing a pulsed TEA CO2 laser that emits at 10.6 mu m on the Al target in ambient air at atmospheric pressure. The temporal profile of the laser pulse is composed of a 100 ns peak followed by a slowly decaying tail of about 2 mu s. The output pulse energy was approximately 160 mJ, thus the peak output power was estimated to be around 1.6 MW. Time-Integrated Space-Resolved Laser Induced Breakdown Spectroscopy (TISR-LIBS) was employed to obtain the emission spectra. The maximum intensity of emission, with sharp and well resolved spectral lines that were almost free of the background continuum, was obtained from plasma region 2 mm from the target surface. Linear calibration curves for Mg, Cr, Cu and Fe were obtained using aluminum alloy spectrochemical standards. The limits of detection for the investigated elements were in the 2-73 ppm range. Inductively Coupled Plasma Optical Emission Spectroscopy (ICP-OES) was used as a reference technique to estimate the accuracy of LIBS determination by use of control samples with known compositions. Comparison of the obtained results with those available in the literature confirms that LIBS system based on TEA CO2 laser, in combination with TISR spectral measurements, can be successfully applied to qualitative and quantitative determinations of minor elements in aluminum based alloys. (C) 2017 Elsevier B.V. All rights reserved.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Journal of Alloys and Compounds",
title = "Elemental analysis of aluminum alloys by Laser Induced Breakdown Spectroscopy based on TEA CO2 laser",
volume = "700",
pages = "175-184",
doi = "10.1016/j.jallcom.2017.01.060"
}

Živković, S., Savovic, J., Trtica, M., Mutić, J.,& Momčilović, M.. (2017). Elemental analysis of aluminum alloys by Laser Induced Breakdown Spectroscopy based on TEA CO2 laser. in Journal of Alloys and Compounds
Elsevier Science Sa, Lausanne., 700, 175-184.
https://doi.org/10.1016/j.jallcom.2017.01.060

Živković S, Savovic J, Trtica M, Mutić J, Momčilović M. Elemental analysis of aluminum alloys by Laser Induced Breakdown Spectroscopy based on TEA CO2 laser. in Journal of Alloys and Compounds. 2017;700:175-184.
doi:10.1016/j.jallcom.2017.01.060 .

Živković, Sanja, Savovic, J., Trtica, M., Mutić, Jelena, Momčilović, Miloš, "Elemental analysis of aluminum alloys by Laser Induced Breakdown Spectroscopy based on TEA CO2 laser" in Journal of Alloys and Compounds, 700 (2017):175-184,
https://doi.org/10.1016/j.jallcom.2017.01.060 . .