TY  - JOUR
AU  - Gulicovski, Jelena J.
AU  - Bracko, Ines
AU  - Milonjić, Slobodan K.
PY  - 2014
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/191
AB  - Ceria sols were synthesized by a forced hydrolysis method using cerium sulphate or cerium nitrate as precursors. High-resolution TEM was used to determine the microstructure and particle size of CeO2. A polycrystalline structure of ceria sols with crystallite sizes of 4.4 and 8.6 nm was obtained. The particles had a well-defined polyhedral shape. Direct bandgaps for ceria nanoparticles were 2.80 and 3.31 eV, respectively. The isoelectric point, pH(iep), of ceria sols in KNO3 solutions was investigated. The isoelectric point of ceria was found to be pH(iep) = 7.6 +/- 0.2. The obtained results indicate that the isoelectric point in the presence of SO42- ions shifts to lower pH value. The particle size of ceria increases with pH, reaching the maximum value at pH(iep) as the result of agglomeration. (C) 2014 Elsevier B.V. All rights reserved.
T2  - Materials Chemistry and Physics
T1  - Morphology and the isoelectric point of nanosized aqueous ceria sols
VL  - 148
IS  - 3
SP  - 868
EP  - 873
DO  - 10.1016/j.matchemphys.2014.08.063
ER  - 

@article{
author = "Gulicovski, Jelena J. and Bracko, Ines and Milonjić, Slobodan K.",
year = "2014",
abstract = "Ceria sols were synthesized by a forced hydrolysis method using cerium sulphate or cerium nitrate as precursors. High-resolution TEM was used to determine the microstructure and particle size of CeO2. A polycrystalline structure of ceria sols with crystallite sizes of 4.4 and 8.6 nm was obtained. The particles had a well-defined polyhedral shape. Direct bandgaps for ceria nanoparticles were 2.80 and 3.31 eV, respectively. The isoelectric point, pH(iep), of ceria sols in KNO3 solutions was investigated. The isoelectric point of ceria was found to be pH(iep) = 7.6 +/- 0.2. The obtained results indicate that the isoelectric point in the presence of SO42- ions shifts to lower pH value. The particle size of ceria increases with pH, reaching the maximum value at pH(iep) as the result of agglomeration. (C) 2014 Elsevier B.V. All rights reserved.",
journal = "Materials Chemistry and Physics",
title = "Morphology and the isoelectric point of nanosized aqueous ceria sols",
volume = "148",
number = "3",
pages = "868-873",
doi = "10.1016/j.matchemphys.2014.08.063"
}

Gulicovski, J. J., Bracko, I.,& Milonjić, S. K.. (2014). Morphology and the isoelectric point of nanosized aqueous ceria sols. in Materials Chemistry and Physics, 148(3), 868-873.
https://doi.org/10.1016/j.matchemphys.2014.08.063

Gulicovski JJ, Bracko I, Milonjić SK. Morphology and the isoelectric point of nanosized aqueous ceria sols. in Materials Chemistry and Physics. 2014;148(3):868-873.
doi:10.1016/j.matchemphys.2014.08.063 .

Gulicovski, Jelena J., Bracko, Ines, Milonjić, Slobodan K., "Morphology and the isoelectric point of nanosized aqueous ceria sols" in Materials Chemistry and Physics, 148, no. 3 (2014):868-873,
https://doi.org/10.1016/j.matchemphys.2014.08.063 . .

TY  - JOUR
AU  - Gulicovski, Jelena J.
AU  - Milonjić, Slobodan K.
AU  - Szecsenyi, K. Meszaros
PY  - 2009
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3900
AB  - Stable colloidal aqueous dispersions (sols) of cerium (IV) oxide of uniform size distribution were obtained by forced hydrolysis of cerium (IV) ions in the presence of diluted sulfuric or nitric acids. Synthesis of ceria sols was carried out using two commercially available precursors: Ce(SO4)(2) center dot 4H(2)O salt and 0.25 mol/L Ce(NO3)(4) aqueous solution. The precursors were dissolved in different concentrations of diluted sulfuric or nitric acid. After aging for various periods of time (2-24 h), the sols were cooled at room temperature. Sulfate and nitrate ions were removed from the sols particles by ultrafiltration. Characterization of the synthesized ceria sols has been made by X-ray diffraction, nitrogen adsorption/desorption, and DSC-TGA thermal analysis, as well as IR spectroscopy. Particle sizes, measured using a Zetasizer Nano equipped with a MPT-2 Autotitrator, range from 20 to 600 nm.
T2  - Materials and Manufacturing Processes
T1  - Synthesis and Characterization of Stable Aqueous Ceria Sols
VL  - 24
IS  - 10-11
SP  - 1080
EP  - 1085
DO  - 10.1080/10426910903032162
ER  - 

@article{
author = "Gulicovski, Jelena J. and Milonjić, Slobodan K. and Szecsenyi, K. Meszaros",
year = "2009",
abstract = "Stable colloidal aqueous dispersions (sols) of cerium (IV) oxide of uniform size distribution were obtained by forced hydrolysis of cerium (IV) ions in the presence of diluted sulfuric or nitric acids. Synthesis of ceria sols was carried out using two commercially available precursors: Ce(SO4)(2) center dot 4H(2)O salt and 0.25 mol/L Ce(NO3)(4) aqueous solution. The precursors were dissolved in different concentrations of diluted sulfuric or nitric acid. After aging for various periods of time (2-24 h), the sols were cooled at room temperature. Sulfate and nitrate ions were removed from the sols particles by ultrafiltration. Characterization of the synthesized ceria sols has been made by X-ray diffraction, nitrogen adsorption/desorption, and DSC-TGA thermal analysis, as well as IR spectroscopy. Particle sizes, measured using a Zetasizer Nano equipped with a MPT-2 Autotitrator, range from 20 to 600 nm.",
journal = "Materials and Manufacturing Processes",
title = "Synthesis and Characterization of Stable Aqueous Ceria Sols",
volume = "24",
number = "10-11",
pages = "1080-1085",
doi = "10.1080/10426910903032162"
}

Gulicovski, J. J., Milonjić, S. K.,& Szecsenyi, K. M.. (2009). Synthesis and Characterization of Stable Aqueous Ceria Sols. in Materials and Manufacturing Processes, 24(10-11), 1080-1085.
https://doi.org/10.1080/10426910903032162

Gulicovski JJ, Milonjić SK, Szecsenyi KM. Synthesis and Characterization of Stable Aqueous Ceria Sols. in Materials and Manufacturing Processes. 2009;24(10-11):1080-1085.
doi:10.1080/10426910903032162 .

Gulicovski, Jelena J., Milonjić, Slobodan K., Szecsenyi, K. Meszaros, "Synthesis and Characterization of Stable Aqueous Ceria Sols" in Materials and Manufacturing Processes, 24, no. 10-11 (2009):1080-1085,
https://doi.org/10.1080/10426910903032162 . .

TY  - JOUR
AU  - Milonjić, Slobodan K.
PY  - 2009
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3901
AB  - The surface properties of various oxides (ZrO(2) and Fe(3)O(4)) and sulfides (HgS and FeS) were investigated by the inverse gas chromatography method (IGC). The retentions of several organics were measured in the temperature range from 330 to 500 K. The dispersive component of the surface free energy (gamma(d)(s)) of studied adsorbent surfaces was estimated using retention times of different nonpolar organics in the infinite dilution region. The gamma(d)(s) values decrease with temperature increase. The obtained results proved that IGC is an efficient and successful technique for the characterization of surface properties of these kinds of materials.
T2  - Materials and Manufacturing Processes
T1  - Determination of Surface Properties of Various Oxides and Sulfides by Inverse Gas Chromatography
VL  - 24
IS  - 10-11
SP  - 1086
EP  - 1089
DO  - 10.1080/10426910903032147
ER  - 

@article{
author = "Milonjić, Slobodan K.",
year = "2009",
abstract = "The surface properties of various oxides (ZrO(2) and Fe(3)O(4)) and sulfides (HgS and FeS) were investigated by the inverse gas chromatography method (IGC). The retentions of several organics were measured in the temperature range from 330 to 500 K. The dispersive component of the surface free energy (gamma(d)(s)) of studied adsorbent surfaces was estimated using retention times of different nonpolar organics in the infinite dilution region. The gamma(d)(s) values decrease with temperature increase. The obtained results proved that IGC is an efficient and successful technique for the characterization of surface properties of these kinds of materials.",
journal = "Materials and Manufacturing Processes",
title = "Determination of Surface Properties of Various Oxides and Sulfides by Inverse Gas Chromatography",
volume = "24",
number = "10-11",
pages = "1086-1089",
doi = "10.1080/10426910903032147"
}

Milonjić, S. K.. (2009). Determination of Surface Properties of Various Oxides and Sulfides by Inverse Gas Chromatography. in Materials and Manufacturing Processes, 24(10-11), 1086-1089.
https://doi.org/10.1080/10426910903032147

Milonjić SK. Determination of Surface Properties of Various Oxides and Sulfides by Inverse Gas Chromatography. in Materials and Manufacturing Processes. 2009;24(10-11):1086-1089.
doi:10.1080/10426910903032147 .

Milonjić, Slobodan K., "Determination of Surface Properties of Various Oxides and Sulfides by Inverse Gas Chromatography" in Materials and Manufacturing Processes, 24, no. 10-11 (2009):1086-1089,
https://doi.org/10.1080/10426910903032147 . .

TY  - JOUR
AU  - Gulicovski, Jelena J.
AU  - Čerović, Ljiljana S.
AU  - Milonjić, Slobodan K.
AU  - Popović, Ivanka G.
PY  - 2008
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3530
AB  - Itaconic acid, IA (C5H6O4), was investigated as a potential flocculant for the aqueous processing of alumina powders. The adsorption of IA, as a function of its concentration and pH value of the solution, onto the alumina surface was studied by the solution depletion method. The stability of the suspensions in the presence of itaconic acid was evaluated in light of the surface charge of the alumina powder used, the degree of dissociation of IA, as well as the sedimentation behavior and rheology of the suspensions. It was found that the adsorption process is extremely pH dependent; the maximum adsorption of IA onto alumina surface occurring at a pH close to the value of the first IA dissociation constant, pK(a1). Also, IA does not influence the value of the point of zero charge of alumina. It was shown that IA represents an efficient flocculant for concentrated acidic alumina suspensions.
T2  - Journal of the Serbian Chemical Society
T1  - Adsorption of itaconic acid from aqueous solutions onto alumina
VL  - 73
IS  - 8-9
SP  - 825
EP  - 834
DO  - 10.2298/JSC0809825G
ER  - 

@article{
author = "Gulicovski, Jelena J. and Čerović, Ljiljana S. and Milonjić, Slobodan K. and Popović, Ivanka G.",
year = "2008",
abstract = "Itaconic acid, IA (C5H6O4), was investigated as a potential flocculant for the aqueous processing of alumina powders. The adsorption of IA, as a function of its concentration and pH value of the solution, onto the alumina surface was studied by the solution depletion method. The stability of the suspensions in the presence of itaconic acid was evaluated in light of the surface charge of the alumina powder used, the degree of dissociation of IA, as well as the sedimentation behavior and rheology of the suspensions. It was found that the adsorption process is extremely pH dependent; the maximum adsorption of IA onto alumina surface occurring at a pH close to the value of the first IA dissociation constant, pK(a1). Also, IA does not influence the value of the point of zero charge of alumina. It was shown that IA represents an efficient flocculant for concentrated acidic alumina suspensions.",
journal = "Journal of the Serbian Chemical Society",
title = "Adsorption of itaconic acid from aqueous solutions onto alumina",
volume = "73",
number = "8-9",
pages = "825-834",
doi = "10.2298/JSC0809825G"
}

Gulicovski, J. J., Čerović, L. S., Milonjić, S. K.,& Popović, I. G.. (2008). Adsorption of itaconic acid from aqueous solutions onto alumina. in Journal of the Serbian Chemical Society, 73(8-9), 825-834.
https://doi.org/10.2298/JSC0809825G

Gulicovski JJ, Čerović LS, Milonjić SK, Popović IG. Adsorption of itaconic acid from aqueous solutions onto alumina. in Journal of the Serbian Chemical Society. 2008;73(8-9):825-834.
doi:10.2298/JSC0809825G .

Gulicovski, Jelena J., Čerović, Ljiljana S., Milonjić, Slobodan K., Popović, Ivanka G., "Adsorption of itaconic acid from aqueous solutions onto alumina" in Journal of the Serbian Chemical Society, 73, no. 8-9 (2008):825-834,
https://doi.org/10.2298/JSC0809825G . .

TY  - JOUR
AU  - Lukić, Dragoljub M.
AU  - Vučina, Jurij L.
AU  - Milonjić, Slobodan K.
PY  - 2007
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3221
AB  - The sorption of perrhenate anion on alumina from aqueous solutions of sodium chloride was investigated under dynamic conditions. The initial concentrations of rhenium were in the range of 2.7 x 10(-2)-2.7 mmol/dM(3). The breakthrough curves as the function of Re and NaCl concentrations (0. 12-0.20 mol/dm(3)), pH 2-6 and flow rate 3-10 ml/min were determined. According to the experimental results, it was concluded that the breakthrough capacities, the capacities at c/c(0) = 0.5, the total column capacities and the utilization degrees (column efficiency) increase with increasing Re and NaCl concentrations and decreasing pH. The optimal flow rate was found to be 3 ml/min. At pH 2 and c(0) = 2.7 mmol Re/dm(3), the total capacity was found to be Q(0.9) (max) = 2.1 x 10(-2) mmol Re/g Al2O3. The data for perrhenate anions fit with a Henry-type isotherm. It was found that, under the above mentioned conditions, the value of the Henry constant K-H was 7.8 x 10(-3) dm(3)/g and the Gibbs energy change, Delta G was -0.5 kJ/mol.
T2  - Journal of the Serbian Chemical Society
T1  - Sorption of rhenium on alumina under dynamic conditions
VL  - 72
IS  - 6
SP  - 555
EP  - 562
DO  - 10.2298/JSC0706555L
ER  - 

@article{
author = "Lukić, Dragoljub M. and Vučina, Jurij L. and Milonjić, Slobodan K.",
year = "2007",
abstract = "The sorption of perrhenate anion on alumina from aqueous solutions of sodium chloride was investigated under dynamic conditions. The initial concentrations of rhenium were in the range of 2.7 x 10(-2)-2.7 mmol/dM(3). The breakthrough curves as the function of Re and NaCl concentrations (0. 12-0.20 mol/dm(3)), pH 2-6 and flow rate 3-10 ml/min were determined. According to the experimental results, it was concluded that the breakthrough capacities, the capacities at c/c(0) = 0.5, the total column capacities and the utilization degrees (column efficiency) increase with increasing Re and NaCl concentrations and decreasing pH. The optimal flow rate was found to be 3 ml/min. At pH 2 and c(0) = 2.7 mmol Re/dm(3), the total capacity was found to be Q(0.9) (max) = 2.1 x 10(-2) mmol Re/g Al2O3. The data for perrhenate anions fit with a Henry-type isotherm. It was found that, under the above mentioned conditions, the value of the Henry constant K-H was 7.8 x 10(-3) dm(3)/g and the Gibbs energy change, Delta G was -0.5 kJ/mol.",
journal = "Journal of the Serbian Chemical Society",
title = "Sorption of rhenium on alumina under dynamic conditions",
volume = "72",
number = "6",
pages = "555-562",
doi = "10.2298/JSC0706555L"
}

Lukić, D. M., Vučina, J. L.,& Milonjić, S. K.. (2007). Sorption of rhenium on alumina under dynamic conditions. in Journal of the Serbian Chemical Society, 72(6), 555-562.
https://doi.org/10.2298/JSC0706555L

Lukić DM, Vučina JL, Milonjić SK. Sorption of rhenium on alumina under dynamic conditions. in Journal of the Serbian Chemical Society. 2007;72(6):555-562.
doi:10.2298/JSC0706555L .

Lukić, Dragoljub M., Vučina, Jurij L., Milonjić, Slobodan K., "Sorption of rhenium on alumina under dynamic conditions" in Journal of the Serbian Chemical Society, 72, no. 6 (2007):555-562,
https://doi.org/10.2298/JSC0706555L . .

TY  - JOUR
AU  - Milonjić, Slobodan K.
PY  - 2007
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3345
AB  - The Langmuir and Freundlich isotherm equations have been widely used for interpreting various adsorption processes. There are, however, many serious mistakes in the literature in determination or calculation of thermodynamic parameters, especially in the determination of the change in the free energy of adsorption using Langmuir, Freundlich and Henry constants. Many authors used these constants for the determination of Delta G expressed instead of dimensionless in some concentration units (for example: 1 mol(-1), 1 g(-1), ml mg(-1), etc.).
T2  - Journal of the Serbian Chemical Society
T1  - A consideration of the correct calculation of thermodynamic parameters of adsorption
VL  - 72
IS  - 12
SP  - 1363
EP  - 1367
DO  - 10.2298/JSC0712363M
ER  - 

@article{
author = "Milonjić, Slobodan K.",
year = "2007",
abstract = "The Langmuir and Freundlich isotherm equations have been widely used for interpreting various adsorption processes. There are, however, many serious mistakes in the literature in determination or calculation of thermodynamic parameters, especially in the determination of the change in the free energy of adsorption using Langmuir, Freundlich and Henry constants. Many authors used these constants for the determination of Delta G expressed instead of dimensionless in some concentration units (for example: 1 mol(-1), 1 g(-1), ml mg(-1), etc.).",
journal = "Journal of the Serbian Chemical Society",
title = "A consideration of the correct calculation of thermodynamic parameters of adsorption",
volume = "72",
number = "12",
pages = "1363-1367",
doi = "10.2298/JSC0712363M"
}

Milonjić, S. K.. (2007). A consideration of the correct calculation of thermodynamic parameters of adsorption. in Journal of the Serbian Chemical Society, 72(12), 1363-1367.
https://doi.org/10.2298/JSC0712363M

Milonjić SK. A consideration of the correct calculation of thermodynamic parameters of adsorption. in Journal of the Serbian Chemical Society. 2007;72(12):1363-1367.
doi:10.2298/JSC0712363M .

Milonjić, Slobodan K., "A consideration of the correct calculation of thermodynamic parameters of adsorption" in Journal of the Serbian Chemical Society, 72, no. 12 (2007):1363-1367,
https://doi.org/10.2298/JSC0712363M . .

TY  - CONF
AU  - Vučina, Jurij L.
AU  - Lukić, Dragoljub
AU  - Milonjić, Slobodan K.
AU  - Stoiljković, Milovan
PY  - 2006
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9443
AB  - The conditions of the desorption of rhenium from the anion exchange resin Dowex 1×8 by nitric acid were determined. The solution (5×10-3 mol/dm3  Re in 0.15 mol/dm3 NaCl) was passed through the column containing 0.1 g of the resin. The total sorbed amount of rhenium was 200 mg/g of the resin. It was then eluted by nitric acid in the concentration range of 0.16-7.2 mol/dm3 . The most favourable elution profile was found with 3.0 mol/dm3  HNO3. Over 77% of the total rhenium was desorbed with 5 ml of this eluence. Over 95% of the sorbed rhenium was recovered by using 20 ml of nitric acid in the concentration range of 0.9-7.2 mol/dm3 .
PB  - Society of Physical Chemists of Serbia
C3  - Physical chemistry 2006: 8th international conference on fundemental and applied aspract of physical chemistry
T1  - Preparation of concentrated rhenium solutions
SP  - 457
EP  - 459
UR  - https://hdl.handle.net/21.15107/rcub_vinar_9443
ER  - 

@conference{
author = "Vučina, Jurij L. and Lukić, Dragoljub and Milonjić, Slobodan K. and Stoiljković, Milovan",
year = "2006",
abstract = "The conditions of the desorption of rhenium from the anion exchange resin Dowex 1×8 by nitric acid were determined. The solution (5×10-3 mol/dm3  Re in 0.15 mol/dm3 NaCl) was passed through the column containing 0.1 g of the resin. The total sorbed amount of rhenium was 200 mg/g of the resin. It was then eluted by nitric acid in the concentration range of 0.16-7.2 mol/dm3 . The most favourable elution profile was found with 3.0 mol/dm3  HNO3. Over 77% of the total rhenium was desorbed with 5 ml of this eluence. Over 95% of the sorbed rhenium was recovered by using 20 ml of nitric acid in the concentration range of 0.9-7.2 mol/dm3 .",
publisher = "Society of Physical Chemists of Serbia",
journal = "Physical chemistry 2006: 8th international conference on fundemental and applied aspract of physical chemistry",
title = "Preparation of concentrated rhenium solutions",
pages = "457-459",
url = "https://hdl.handle.net/21.15107/rcub_vinar_9443"
}

Vučina, J. L., Lukić, D., Milonjić, S. K.,& Stoiljković, M.. (2006). Preparation of concentrated rhenium solutions. in Physical chemistry 2006: 8th international conference on fundemental and applied aspract of physical chemistry
Society of Physical Chemists of Serbia., 457-459.
https://hdl.handle.net/21.15107/rcub_vinar_9443

Vučina JL, Lukić D, Milonjić SK, Stoiljković M. Preparation of concentrated rhenium solutions. in Physical chemistry 2006: 8th international conference on fundemental and applied aspract of physical chemistry. 2006;:457-459.
https://hdl.handle.net/21.15107/rcub_vinar_9443 .

Vučina, Jurij L., Lukić, Dragoljub, Milonjić, Slobodan K., Stoiljković, Milovan, "Preparation of concentrated rhenium solutions" in Physical chemistry 2006: 8th international conference on fundemental and applied aspract of physical chemistry (2006):457-459,
https://hdl.handle.net/21.15107/rcub_vinar_9443 .