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Materials science--Poland, 2020-09, Vol.38 (3), p.424-433
2020
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Autor(en) / Beteiligte
Titel
Effect of titanium source and sol-gel TiO 2 thin film formation parameters on its morphology and photocatalytic activity
Ist Teil von
  • Materials science--Poland, 2020-09, Vol.38 (3), p.424-433
Erscheinungsjahr
2020
Quelle
EZB-FREE-00999 freely available EZB journals
Beschreibungen/Notizen
  • Abstract TiO 2 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 TiO 2 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 TiO 2 films by exposing their aqueous solutions to UV light (λ = 254 nm). The highest photocatalytic activity had the TiO 2 layer produced using titanium isopropoxide.
Sprache
Englisch
Identifikatoren
ISSN: 2083-134X
eISSN: 2083-134X
DOI: 10.2478/msp-2020-0056
Titel-ID: cdi_crossref_primary_10_2478_msp_2020_0056
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