Lanthanide-doped titanium dioxide layers as photocatalysts |
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| Authors: | M. Uzunova-Bujnova D. Dimitrov |
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| Affiliation: | a Department of General and Inorganic Chemistry, Faculty of Chemistry, University of Sofia, 1 J. Bourchier Boulevard, Sofia 1164, Bulgaria
b Institute of Electronics, Bulgarian Academy of Sciences, 72 Tsarigradsko Shosse Boulevard, Sofia 1784, Bulgaria |
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| Abstract: | Films (∼0.5 mg/cm2) from TiO2 doped with 1-10 mol% Ln3+ (Ln = La or Gd) are deposited on different types of substrates by spray-pyrolysis using ethylene glycol solutions of Ti4+-Ln3+ citric complexes as starting material and O2 as a carrier gas. The films are post-deposition heated at 500 °C. Their phase composition, crystal structure, morphology, sorption ability and photocatalytic activity are studied. Aqueous solution of methylene blue is applied as a model pollutant. A film with 5 mol% La on Ti-coated stainless steel substrate shows significantly higher photocatalytic activity than the best performing samples produced from commercially available titania. |
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| Keywords: | 68.43.&minus h 77.84.Dy 81.15.&minus z 82.50.&minus m |
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