Stefanov, Plamen

Link to this page

Authority KeyName Variants
874ff55a-d0e3-49e6-9376-fbb28e70be8b
  • Stefanov, Plamen (3)
Projects

Author's Bibliography

TiO2/WO3 photocatalytic composite coatings prepared by spray pyrolysis

Grbic, Bosko; Radić, Nenad; Stojadinovic, Stevan; Vasilic, Rastko; Dohčević-Mitrović, Zorana ; Šaponjić, Zoran; Stefanov, Plamen

(2014)

TY  - JOUR
AU  - Grbic, Bosko
AU  - Radić, Nenad
AU  - Stojadinovic, Stevan
AU  - Vasilic, Rastko
AU  - Dohčević-Mitrović, Zorana 
AU  - Šaponjić, Zoran
AU  - Stefanov, Plamen
PY  - 2014
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/315
AB  - TiO2/WO3 composites supported on a stainless steel foil were prepared by the spray pyrolysis technique. Content of WO3 was gradually increased from 1 wt% to 100 wt.%, while the coating thickness was limited to about 1 pm. The coatings were characterized by X-ray diffraction, scanning electron microscopy, atomic force microscopy, X-ray photoelectron spectroscopy, and Raman spectroscopy. The photocatalytic activity of obtained coatings was investigated by degradation of methyl orange, used as model pollutant. The results show that with increasing WO3 content up to 10 wt.% photoactivity increases as result of better charge separation that could effectively prevent the recombination of photogenerated electrons and holes. Further increase of WO3 content led to decrease of photoactivity. (C) 2014 Elsevier B.V. All rights reserved.
T2  - Surface and Coatings Technology
T1  - TiO2/WO3 photocatalytic composite coatings prepared by spray pyrolysis
VL  - 258
SP  - 763
EP  - 771
DO  - 10.1016/j.surfcoat.2014.07.082
ER  - 
@article{
author = "Grbic, Bosko and Radić, Nenad and Stojadinovic, Stevan and Vasilic, Rastko and Dohčević-Mitrović, Zorana  and Šaponjić, Zoran and Stefanov, Plamen",
year = "2014",
abstract = "TiO2/WO3 composites supported on a stainless steel foil were prepared by the spray pyrolysis technique. Content of WO3 was gradually increased from 1 wt% to 100 wt.%, while the coating thickness was limited to about 1 pm. The coatings were characterized by X-ray diffraction, scanning electron microscopy, atomic force microscopy, X-ray photoelectron spectroscopy, and Raman spectroscopy. The photocatalytic activity of obtained coatings was investigated by degradation of methyl orange, used as model pollutant. The results show that with increasing WO3 content up to 10 wt.% photoactivity increases as result of better charge separation that could effectively prevent the recombination of photogenerated electrons and holes. Further increase of WO3 content led to decrease of photoactivity. (C) 2014 Elsevier B.V. All rights reserved.",
journal = "Surface and Coatings Technology",
title = "TiO2/WO3 photocatalytic composite coatings prepared by spray pyrolysis",
volume = "258",
pages = "763-771",
doi = "10.1016/j.surfcoat.2014.07.082"
}
Grbic, B., Radić, N., Stojadinovic, S., Vasilic, R., Dohčević-Mitrović, Z., Šaponjić, Z.,& Stefanov, P.. (2014). TiO2/WO3 photocatalytic composite coatings prepared by spray pyrolysis. in Surface and Coatings Technology, 258, 763-771.
https://doi.org/10.1016/j.surfcoat.2014.07.082
Grbic B, Radić N, Stojadinovic S, Vasilic R, Dohčević-Mitrović Z, Šaponjić Z, Stefanov P. TiO2/WO3 photocatalytic composite coatings prepared by spray pyrolysis. in Surface and Coatings Technology. 2014;258:763-771.
doi:10.1016/j.surfcoat.2014.07.082 .
Grbic, Bosko, Radić, Nenad, Stojadinovic, Stevan, Vasilic, Rastko, Dohčević-Mitrović, Zorana , Šaponjić, Zoran, Stefanov, Plamen, "TiO2/WO3 photocatalytic composite coatings prepared by spray pyrolysis" in Surface and Coatings Technology, 258 (2014):763-771,
https://doi.org/10.1016/j.surfcoat.2014.07.082 . .
27
28
29

Photodegradation of an azo pyridone dye using TiO2 films prepared by the spray pyrolysis method

Dostanic, Jasmina; Grbic, Bosko; Radić, Nenad; Stefanov, Plamen; Šaponjić, Zoran; Buha, Jelena; Mijin, Dušan Ž.

(2012)

TY  - JOUR
AU  - Dostanic, Jasmina
AU  - Grbic, Bosko
AU  - Radić, Nenad
AU  - Stefanov, Plamen
AU  - Šaponjić, Zoran
AU  - Buha, Jelena
AU  - Mijin, Dušan Ž.
PY  - 2012
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4701
AB  - In this study, the feasibility of preparing porous TiO2 films on a stainless steel substrate from a hydrothermally prepared colloidal TiO2 solution by the spray pyrolysis technique is presented. The prepared samples were annealed at different temperatures and characterized by the XPS, XRD and SEM techniques, porosimetry and specific surface area measurements. The photocatalytic activities of the resulting films were evaluated by measuring the degradation of an azo pyridone dye, used as model pollutant, under simulated sunlight conditions. The relationships between the structural and morphological characteristics of the TiO2 films and their photoactivity were observed. It was found that the photoactivity was markedly dependent on the annealing temperature. On increasing the calcination temperature from 500 degrees C to 700 degrees C, the crystallite size and the rutile content increased, whereas the specific surface area and the rate of photodegradation decreased. Calcination at 700 degrees C resulted in a completely loss of photoactivity, due to the partial transformation of anatase to rutile phase, the increased crystallite size and decreased specific surface area. Specific activity (per unit of mass and per unit of surface area) was lowered within thicker films, pointing out significance of transport phenomena through porous films (the transport of dye and the transmittance of light as immaterial reagent). Based on the obtained results, the spray pyrolysis method appears to be a good choice for the preparation of photocatalytically active TiO2 films for the removal of dye pollutants. (C) 2011 Elsevier B.V. All rights reserved.
T2  - Chemical Engineering Journal
T1  - Photodegradation of an azo pyridone dye using TiO2 films prepared by the spray pyrolysis method
VL  - 180
SP  - 57
EP  - 65
DO  - 10.1016/j.cej.2011.10.100
ER  - 
@article{
author = "Dostanic, Jasmina and Grbic, Bosko and Radić, Nenad and Stefanov, Plamen and Šaponjić, Zoran and Buha, Jelena and Mijin, Dušan Ž.",
year = "2012",
abstract = "In this study, the feasibility of preparing porous TiO2 films on a stainless steel substrate from a hydrothermally prepared colloidal TiO2 solution by the spray pyrolysis technique is presented. The prepared samples were annealed at different temperatures and characterized by the XPS, XRD and SEM techniques, porosimetry and specific surface area measurements. The photocatalytic activities of the resulting films were evaluated by measuring the degradation of an azo pyridone dye, used as model pollutant, under simulated sunlight conditions. The relationships between the structural and morphological characteristics of the TiO2 films and their photoactivity were observed. It was found that the photoactivity was markedly dependent on the annealing temperature. On increasing the calcination temperature from 500 degrees C to 700 degrees C, the crystallite size and the rutile content increased, whereas the specific surface area and the rate of photodegradation decreased. Calcination at 700 degrees C resulted in a completely loss of photoactivity, due to the partial transformation of anatase to rutile phase, the increased crystallite size and decreased specific surface area. Specific activity (per unit of mass and per unit of surface area) was lowered within thicker films, pointing out significance of transport phenomena through porous films (the transport of dye and the transmittance of light as immaterial reagent). Based on the obtained results, the spray pyrolysis method appears to be a good choice for the preparation of photocatalytically active TiO2 films for the removal of dye pollutants. (C) 2011 Elsevier B.V. All rights reserved.",
journal = "Chemical Engineering Journal",
title = "Photodegradation of an azo pyridone dye using TiO2 films prepared by the spray pyrolysis method",
volume = "180",
pages = "57-65",
doi = "10.1016/j.cej.2011.10.100"
}
Dostanic, J., Grbic, B., Radić, N., Stefanov, P., Šaponjić, Z., Buha, J.,& Mijin, D. Ž.. (2012). Photodegradation of an azo pyridone dye using TiO2 films prepared by the spray pyrolysis method. in Chemical Engineering Journal, 180, 57-65.
https://doi.org/10.1016/j.cej.2011.10.100
Dostanic J, Grbic B, Radić N, Stefanov P, Šaponjić Z, Buha J, Mijin DŽ. Photodegradation of an azo pyridone dye using TiO2 films prepared by the spray pyrolysis method. in Chemical Engineering Journal. 2012;180:57-65.
doi:10.1016/j.cej.2011.10.100 .
Dostanic, Jasmina, Grbic, Bosko, Radić, Nenad, Stefanov, Plamen, Šaponjić, Zoran, Buha, Jelena, Mijin, Dušan Ž., "Photodegradation of an azo pyridone dye using TiO2 films prepared by the spray pyrolysis method" in Chemical Engineering Journal, 180 (2012):57-65,
https://doi.org/10.1016/j.cej.2011.10.100 . .
19
21
23

The thermal stability of porous alumina/stainless steel catalyst support obtained by spray pyrolysis

Novaković, Tatjana ; Radić, Nenad; Grbic, Bosko; Dondur, Vera; Mitrić, Miodrag; Randjelovic, Danijela; Stoychev, Dimitar; Stefanov, Plamen

(2008)

TY  - JOUR
AU  - Novaković, Tatjana 
AU  - Radić, Nenad
AU  - Grbic, Bosko
AU  - Dondur, Vera
AU  - Mitrić, Miodrag
AU  - Randjelovic, Danijela
AU  - Stoychev, Dimitar
AU  - Stefanov, Plamen
PY  - 2008
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3582
AB  - Active porous alumina coatings were obtained by deposition of boehmite sol on stainless steel (SS) substrate by spray pyrolysis method. The temperature and the doping of polyethylene glycol (PEG) and La(3+) in the boehmite sol effects on the textural and structural properties and surface morphology of alumina coatings on stainless steel samples are presented. It was found that the addition of polyethylene glycol combined with La3+ to the boehmite sol before spraying improves the thermal stability of porous alumina coatings. X-ray diffraction patterns of a doped sample, even after 5 h at 1000 degrees C, point out to the presence only of delta-Al(2)O(3), with a S(BET) of 74 m(2)/g. XPS data and SEM photographs of coated samples show that alumina were well deposited on the metallic supports. The absence of any lanthanum compounds indicates very well homogeneous dispersion of La(3+)-ions on the surface of alumina crystallites. AFM images show sphere like alumina grains and agglomerates with surface roughness from 60 to 180 nm, depending on temperature and doping. Surface roughness of doped alumina samples was higher than that of non-doped. It was pointed out that spray pyrolysis method enables preparation of alumina layers with relatively high specific surface area, suitable for applications as catalysts supports. (C) 2008 Elsevier B.V. All rights reserved.
T2  - Applied Surface Science
T1  - The thermal stability of porous alumina/stainless steel catalyst support obtained by spray pyrolysis
VL  - 255
IS  - 5
SP  - 3049
EP  - 3055
DO  - 10.1016/j.apsusc.2008.08.074
ER  - 
@article{
author = "Novaković, Tatjana  and Radić, Nenad and Grbic, Bosko and Dondur, Vera and Mitrić, Miodrag and Randjelovic, Danijela and Stoychev, Dimitar and Stefanov, Plamen",
year = "2008",
abstract = "Active porous alumina coatings were obtained by deposition of boehmite sol on stainless steel (SS) substrate by spray pyrolysis method. The temperature and the doping of polyethylene glycol (PEG) and La(3+) in the boehmite sol effects on the textural and structural properties and surface morphology of alumina coatings on stainless steel samples are presented. It was found that the addition of polyethylene glycol combined with La3+ to the boehmite sol before spraying improves the thermal stability of porous alumina coatings. X-ray diffraction patterns of a doped sample, even after 5 h at 1000 degrees C, point out to the presence only of delta-Al(2)O(3), with a S(BET) of 74 m(2)/g. XPS data and SEM photographs of coated samples show that alumina were well deposited on the metallic supports. The absence of any lanthanum compounds indicates very well homogeneous dispersion of La(3+)-ions on the surface of alumina crystallites. AFM images show sphere like alumina grains and agglomerates with surface roughness from 60 to 180 nm, depending on temperature and doping. Surface roughness of doped alumina samples was higher than that of non-doped. It was pointed out that spray pyrolysis method enables preparation of alumina layers with relatively high specific surface area, suitable for applications as catalysts supports. (C) 2008 Elsevier B.V. All rights reserved.",
journal = "Applied Surface Science",
title = "The thermal stability of porous alumina/stainless steel catalyst support obtained by spray pyrolysis",
volume = "255",
number = "5",
pages = "3049-3055",
doi = "10.1016/j.apsusc.2008.08.074"
}
Novaković, T., Radić, N., Grbic, B., Dondur, V., Mitrić, M., Randjelovic, D., Stoychev, D.,& Stefanov, P.. (2008). The thermal stability of porous alumina/stainless steel catalyst support obtained by spray pyrolysis. in Applied Surface Science, 255(5), 3049-3055.
https://doi.org/10.1016/j.apsusc.2008.08.074
Novaković T, Radić N, Grbic B, Dondur V, Mitrić M, Randjelovic D, Stoychev D, Stefanov P. The thermal stability of porous alumina/stainless steel catalyst support obtained by spray pyrolysis. in Applied Surface Science. 2008;255(5):3049-3055.
doi:10.1016/j.apsusc.2008.08.074 .
Novaković, Tatjana , Radić, Nenad, Grbic, Bosko, Dondur, Vera, Mitrić, Miodrag, Randjelovic, Danijela, Stoychev, Dimitar, Stefanov, Plamen, "The thermal stability of porous alumina/stainless steel catalyst support obtained by spray pyrolysis" in Applied Surface Science, 255, no. 5 (2008):3049-3055,
https://doi.org/10.1016/j.apsusc.2008.08.074 . .
20
16
20