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1.
Transparent titania-zirconia-silica thin films for self-cleaning and photocatalytic applications
Urška Lavrenčič Štangar, Vlasta Brezova, Nives Vodišek, Kandalam Ramanujachary, 2017, published scientific conference contribution

Found in: ključnih besedah
Summary of found: ... TiO2, ZrO2, thin films, photocatalysis, mechanical stability...
Keywords: TiO2, ZrO2, thin films, photocatalysis, mechanical stability
Published: 13.03.2017; Views: 1985; Downloads: 5
.pdf Fulltext (1,46 MB)

2.
Transparent titania-zirconia thin films for self-cleaning and photocatalytic application
Vlasta Brezová, Kandalam Ramanujachary, Nives Vodišek, Urška Lavrenčič Štangar, 2016, published scientific conference contribution abstract

Abstract: Thin films were prepared by sol-gel process, where different amount of zirconia were added to titania. Photocatalytic activity of thin films was measured by two methods i) determination of degradation ration of methyl stearate with measuring the contact angle and ii) formation of hydroxyterephthalic acid was measured by spectrofluorometer. Prepared samples were characterized by UV-Vis spectrophotometer, SEM, XRD, FT-IR ATR, and BET. The result of measurements of photocatalytic activity shows that the highest activity has a sample without addition of zirconia, but mechanical stability of that sample is worse.
Found in: ključnih besedah
Summary of found: ...photocatalysis, ZrO2/ TiO2, thin films, self-cleaning, low-temperature, sol-gel process...
Keywords: photocatalysis, ZrO2/ TiO2, thin films, self-cleaning, low-temperature, sol-gel process
Published: 14.03.2017; Views: 1933; Downloads: 113
.pdf Fulltext (462,52 KB)

3.
Transparent Photocatalytic Thin Films on Flexible Polymer Substrates
Nives Vodišek, Andraž Šuligoj, Dorota Korte, Urška Lavrenčič Štangar, 2018, original scientific article

Found in: ključnih besedah
Summary of found: ...photocatalysis, self-cleaning surface, TiO2, ZrO2, SiO2, transparent films, thermosensitive substrates, PMMA, PVC,...
Keywords: photocatalysis, self-cleaning surface, TiO2, ZrO2, SiO2, transparent films, thermosensitive substrates, PMMA, PVC, PES, PVDF
Published: 19.10.2018; Views: 657; Downloads: 67
.pdf Fulltext (4,37 MB)

4.
Self-cleaning and photoactive TiO2 – ZrO2 – SiO2 films on thermosensitive and glass substrates
Urška Lavrenčič Štangar, Nives Vodišek, 2017, published scientific conference contribution abstract

Abstract: Nanosized TiO2 is well-known for its photocatalytic property. From the combination of photocatalysis and photoinduced hydrophilicity properties, thin films of this material have also anti-fogging, self-cleaning and antimicrobial properties. There are numerous deposition techniques e.g. spin-coating, dip-coating, spraying, the most suitable one is chosen based on substrate or solution characteristics. Thin films are often required to be transparent for visible light, especially if we use them on transparent substrates, or they should not affect the color of the substrate. Radicals that are produced during photosensitizing process are able to destroy structure of a substrate and substrate can lose mechanical stability [1,2]. Some studies show that adding a SiO2 protective layer can prevent the damage of the substrate [3–5]. Ti-Zr containing sols were prepared with sol-gel process, where titanium(IV) isopropoxide, zirconium(IV) butoxide and ethanol were hydrolyzed with aqueous solution of perchloric acid. Solution was then refluxed for 48 hours. During that time crystallization and deaggregation took place and that resulted in a stable final solution [6]. To prepare suitable solution for production of durable films silica binder was added. On glass and plastic substrates, thin films were deposited with the dip-coating method and dried with a heat-gun. Thin films were characterized by measurements of photocatalytic activity with terephthalic acid as model organic pollutant subjected to oxidation via fluorescent degradation product, photoinduced superhydrophilicity phenomena, UV-Vis and ATR-FTIR spectroscopy, SEM images, as well as mechanical properties measurements. References [1] H. Schmidt, M. Naumann, T.S. Müller, M. Akarsu, Thin Solid Films (2006) 502, 132– 137. [2] W. A. Daoud, J.H. Xin, Y.H. Zhang, Surf. Sci. (2005) 599, 69–75. [3] Ž. Senić, S. Bauk, M. Vitorović-Todorović, N. Pajić, A. Samolov, D. Rajić, Sci. Tech. Rev. (2011) 61, 63–72. [4] T. Yuranova, R. Mosteo, J. Bandara, D. Laub, J. Kiwi, J. Mol. Catal. A: Chem. (2006) 244, 160–167. [5] T. Yuranova, D. Laub, J. Kiwi, Catal. Today (2007) 122, 109–117. [6] N. Vodišek, K. Ramanujachary, V. Brezová, U. Lavrenčič Štangar, Catal. Today (2017) 287, 142–147.
Found in: ključnih besedah
Keywords: Self-cleaning surface, photocatalysis, TiO2, ZrO2, SiO2, PVC, PMMA, thermosensitive substrates, glass
Published: 05.03.2019; Views: 651; Downloads: 0
.pdf Fulltext (5,20 MB)

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