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Title:Self-cleaning and photoactive TiO2 – ZrO2 – SiO2 films on thermosensitive and glass substrates
Authors:ID Vodišek, Nives (Copyright holder)
ID Vodišek, Nives, Laboratory for Environmental and Life Sciences, University of Nova Gorica (Author)
ID Lavrenčič Štangar, Urška, Laboratory for Environmental and Life Sciences, University of Nova Gorica; Faculty of Chemistry and Chemical Technology, University of Ljubljana (Author)
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Language:English
Work type:Not categorized
Typology:1.12 - Published Scientific Conference Contribution Abstract
Organization:UNG - University of Nova Gorica
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.
Keywords:Self-cleaning surface, photocatalysis, TiO2, ZrO2, SiO2, PVC, PMMA, thermosensitive substrates, glass
Year of publishing:2017
Number of pages:117
PID:20.500.12556/RUNG-4417-d73cbb9b-86df-02c5-bd8e-7f9aac486560 New window
COBISS.SI-ID:5336315 New window
NUK URN:URN:SI:UNG:REP:KLM7GF6R
Publication date in RUNG:05.03.2019
Views:3779
Downloads:0
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Record is a part of a monograph

Title:NANOAPP 2017, Nanomaterials & Application [Elektronski vir] : 14-18 June 2017, Bled, Slovenia
Place of publishing:Maribor
Year of publishing:2017
Conference organizer:IOS, Institute for Environmental Protection and Sensors Ltd

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