Effect of titanium source and sol-gel TiO₂ thin film formation parameters on its morphology and photocatalytic activity

• Autorzy: Dulian Piotr , Zajic Jan , Żukowski Witold

Identyfikatory

DOI

10.2478/msp-2020-0056

• Języki publikacji: EN

Abstrakty

EN

TiO₂ thin films with different surface structure have been prepared from alkoxide solutions by the sol-gel method using different cationic precursors and heat treatment techniques. The effect of using titanium isopropoxide as well as titanium butoxide as a titanium source on the surface structure and photocatalytic activity of the resultant thin films was studied. Significant differences in the rate of hydrolysis and condensation reactions during the sol-gel synthesis were observed for these titanium precursors. This had a direct influence on the morphology of the as-prepared TiO₂ films. Higher quality oxide coatings were obtained from titanium isopropoxide. They were characterized by a smaller grain size, improved surface roughness and uniform coverage of the glass substrate. A beneficial effect of calcination process after each sol application cycle in contrast to single step calcination after all dip-coating cycles was observed. Photocatalytic degradation tests showed that methyl orange was decolorized in the presence of all prepared TiO₂ films by exposing their aqueous solutions to UV light (λ = 254 nm). The highest photocatalytic activity had the TiO₂ layer produced using titanium isopropoxide.

Słowa kluczowe

EN

TiO2 thin films; sol-gel; photocatalysis

• Wydawca: De Gruyter
• Czasopismo: Materials Science Poland
• Rocznik: 2020
• Tom: Vol. 38, No. 3
• Strony: 424--433
• Opis fizyczny: Bibliogr. 32 poz., rys., tab.

Twórcy

autor

Dulian Piotr

• Faculty of Chemical Engineering and Technology, Cracow University of Technology, 24 Warszawska St., 310155 Cracow, Poland

autor

Zajic Jan

• Faculty of Chemical Engineering and Technology, Cracow University of Technology, 24 Warszawska St., 310155 Cracow, Poland

autor

Żukowski Witold

• Faculty of Chemical Engineering and Technology, Cracow University of Technology, 24 Warszawska St., 310155 Cracow, Poland

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