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Publikācija: Synthesis and Photocatalytic Activity of Modified TiO2 Thin Films Prepared by Spray Pyrolysis

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Publikācijas valoda English (en)
Nosaukums oriģinālvalodā Synthesis and Photocatalytic Activity of Modified TiO2 Thin Films Prepared by Spray Pyrolysis
Pētniecības nozare 2. Inženierzinātnes un tehnoloģijas
Pētniecības apakšnozare 2.5. Materiālzinātne
Autori Laura Rozenberga-Voska
Jānis Grabis
Atslēgas vārdi TiO2, thin films
Anotācija Nowadays TiO2 nanoparticles are recognized as active photocatalyst for degradation of organic pollutants under UV radiation. However, direct application of the nanoparticles for water treatment is limited because their separation from water is difficult. From this point of view promising is use of fixed onto substrate photocatalyst. The aim of the research was elaboration active modified TiO2 thin films and determination their photocatalytical properties. TiO2 thin films were obtained by spray pyrolysis equipment Holmarc HO-TH-04 using titanium(IV) isopropoxide (TTIP) as precursor, acetyl acetone as stabilizer and isopropyl alcohol as solvent. Different concentrations of TTIP solutions were prepared and various modifiers were added. The thin films were made on the heated glass substrate using air as carrier gas at 2 bar pressure. After spraying the obtained samples were annealed in air at 500 ºC temperature for several hours. The structure and morphology of the thin films were characterized by X-ray diffraction and scanning electron microscopy. Photocatalytical activity was measured by degradation of methylene blue dye under UV irradiation. Silver doped samples showed better photocatalytic properties than unmodified samples. The photocatalytic reaction rate is mainly affected by the crystalline state. Therefore longer annealing time after spraying improved the rate, too.
Atsauce Rozenberga-Voska, L., Grabis, J. Synthesis and Photocatalytic Activity of Modified TiO2 Thin Films Prepared by Spray Pyrolysis. No: 26rd International Baltic Conference Materials Engineering 2017, Lietuva, Kaunas, 26.-27. oktobris, 2017. Kaunas: 2017, 25.-25.lpp. ISSN 2029-8307.
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