Photodegradation of an azo pyridone dye using TiO2 films prepared by the spray pyrolysis method
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2012
Authors
Dostanić, Jasmina
Grbić, Boško

Radić, Nenad

Stefanov, Plamen

Šaponjić, Zoran

Buha, Jelena
Mijin, Dušan

Article (Published version)

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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 deg...rees 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.
Keywords:
TiO2 films / Stainless steel / Spray pyrolysis / Photocatalysis / Azo pyridone dyeSource:
Chemical Engineering Journal, 2012, 180, 57-65Publisher:
- Elsevier Science Sa, Lausanne
Funding / projects:
- The development of efficient chemical-engineering processes based on the transport phenomena research and process intensification principles (RS-172022)
- Chemical and structural designing of nanomaterials for application in medicine and tissue engineering (RS-172026)
- Nanostructured Functional and Composite Materials in Catalytic and Sorption Processes (RS-45001)
DOI: 10.1016/j.cej.2011.10.100
ISSN: 1385-8947
WoS: 000300475900008
Scopus: 2-s2.0-84455208127
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IHTMTY - JOUR AU - Dostanić, Jasmina AU - Grbić, Boško AU - Radić, Nenad AU - Stefanov, Plamen AU - Šaponjić, Zoran AU - Buha, Jelena AU - Mijin, Dušan PY - 2012 UR - https://cer.ihtm.bg.ac.rs/handle/123456789/997 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. PB - Elsevier Science Sa, Lausanne 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 = "Dostanić, Jasmina and Grbić, Boško and Radić, Nenad and Stefanov, Plamen and Šaponjić, Zoran and Buha, Jelena and Mijin, Dušan", 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.", publisher = "Elsevier Science Sa, Lausanne", 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" }
Dostanić, J., Grbić, B., Radić, N., Stefanov, P., Šaponjić, Z., Buha, J.,& Mijin, D.. (2012). Photodegradation of an azo pyridone dye using TiO2 films prepared by the spray pyrolysis method. in Chemical Engineering Journal Elsevier Science Sa, Lausanne., 180, 57-65. https://doi.org/10.1016/j.cej.2011.10.100
Dostanić J, Grbić B, Radić N, Stefanov P, Šaponjić Z, Buha J, Mijin D. 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 .
Dostanić, Jasmina, Grbić, Boško, Radić, Nenad, Stefanov, Plamen, Šaponjić, Zoran, Buha, Jelena, Mijin, Dušan, "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 . .