Details
| Original language | English |
|---|---|
| Pages (from-to) | 397-405 |
| Number of pages | 9 |
| Journal | Journal of Photochemistry and Photobiology A: Chemistry |
| Volume | 367 |
| Early online date | 1 Sept 2018 |
| Publication status | Published - 1 Dec 2018 |
Abstract
Here we focused on the fundamental study of self-cleaning properties of zirconium dioxide films, including photoinduced alteration of surface hydrophilicity, photocatalytic and photoinduced bactericidal activities. The accent was made on the factors influencing the photoinduced hydrophilic conversion such as surface acidity and spectral composition of light for the surface photoexcitation. The studies on photoinduced hydrophilic conversion of the ZrO 2 thin film were carried out using the contact angle measurements and XPS method. The experimental data demonstrate the very different hydrophilic behavior of the hydrated surface depending on the spectral region of photoexcitation corresponding to intrinsic or extrinsic ZrO 2 absorption. This is explained by the difference in the concentration of photoelectrons and photoholes which participate in the photo-induced surface processes. It is suggested that hole-trapping species such as surface hydroxyl groups and adsorbed water molecules play a crucial role in the photoinduced superhydrophilic transition. The effect of the electron-acceptor and electron-donor gas atmospheres on the aging of the surface superhydrophilicity is found to be in agreement with this conclusion. The photochemical activity of ZrO 2 coatings was tested by photodegradation of stearic acid. The antibacterial properties are investigated against Escherichia coli. The ZrO 2 thin films reveal self-cleaning properties and can be successfully used as biomedical or construction material.
Keywords
- Antibacterial activity, Coating, Photocatalytic activity, Photoexcitation, Photoinduced hydrophilicity, Self-cleaning, Surface acidity, Thin film, Zirconium oxide
ASJC Scopus subject areas
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In: Journal of Photochemistry and Photobiology A: Chemistry, Vol. 367, 01.12.2018, p. 397-405.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Self-cleaning properties of zirconium dioxide thin films
AU - Rudakova, A.V.
AU - Emeline, A.V.
AU - Bulanin, K.M.
AU - Chistyakova, L.V.
AU - Maevskaya, M.V.
AU - Bahnemann, D.W.
N1 - © 2018 Elsevier B.V. All rights reserved.
PY - 2018/12/1
Y1 - 2018/12/1
N2 - Here we focused on the fundamental study of self-cleaning properties of zirconium dioxide films, including photoinduced alteration of surface hydrophilicity, photocatalytic and photoinduced bactericidal activities. The accent was made on the factors influencing the photoinduced hydrophilic conversion such as surface acidity and spectral composition of light for the surface photoexcitation. The studies on photoinduced hydrophilic conversion of the ZrO 2 thin film were carried out using the contact angle measurements and XPS method. The experimental data demonstrate the very different hydrophilic behavior of the hydrated surface depending on the spectral region of photoexcitation corresponding to intrinsic or extrinsic ZrO 2 absorption. This is explained by the difference in the concentration of photoelectrons and photoholes which participate in the photo-induced surface processes. It is suggested that hole-trapping species such as surface hydroxyl groups and adsorbed water molecules play a crucial role in the photoinduced superhydrophilic transition. The effect of the electron-acceptor and electron-donor gas atmospheres on the aging of the surface superhydrophilicity is found to be in agreement with this conclusion. The photochemical activity of ZrO 2 coatings was tested by photodegradation of stearic acid. The antibacterial properties are investigated against Escherichia coli. The ZrO 2 thin films reveal self-cleaning properties and can be successfully used as biomedical or construction material.
AB - Here we focused on the fundamental study of self-cleaning properties of zirconium dioxide films, including photoinduced alteration of surface hydrophilicity, photocatalytic and photoinduced bactericidal activities. The accent was made on the factors influencing the photoinduced hydrophilic conversion such as surface acidity and spectral composition of light for the surface photoexcitation. The studies on photoinduced hydrophilic conversion of the ZrO 2 thin film were carried out using the contact angle measurements and XPS method. The experimental data demonstrate the very different hydrophilic behavior of the hydrated surface depending on the spectral region of photoexcitation corresponding to intrinsic or extrinsic ZrO 2 absorption. This is explained by the difference in the concentration of photoelectrons and photoholes which participate in the photo-induced surface processes. It is suggested that hole-trapping species such as surface hydroxyl groups and adsorbed water molecules play a crucial role in the photoinduced superhydrophilic transition. The effect of the electron-acceptor and electron-donor gas atmospheres on the aging of the surface superhydrophilicity is found to be in agreement with this conclusion. The photochemical activity of ZrO 2 coatings was tested by photodegradation of stearic acid. The antibacterial properties are investigated against Escherichia coli. The ZrO 2 thin films reveal self-cleaning properties and can be successfully used as biomedical or construction material.
KW - Antibacterial activity
KW - Coating
KW - Photocatalytic activity
KW - Photoexcitation
KW - Photoinduced hydrophilicity
KW - Self-cleaning
KW - Surface acidity
KW - Thin film
KW - Zirconium oxide
UR - http://www.scopus.com/inward/record.url?scp=85053319961&partnerID=8YFLogxK
U2 - 10.1016/j.jphotochem.2018.08.037
DO - 10.1016/j.jphotochem.2018.08.037
M3 - Article
VL - 367
SP - 397
EP - 405
JO - Journal of Photochemistry and Photobiology A: Chemistry
JF - Journal of Photochemistry and Photobiology A: Chemistry
SN - 1010-6030
ER -