HUSCAP logo Hokkaido Univ. logo

Hokkaido University Collection of Scholarly and Academic Papers >
Institute for Catalysis >
Peer-reviewed Journal Articles, etc >

Action spectrum analyses of photoinduced superhydrophilicity of titania thin films on glass plates

Files in This Item:
TSF516-17_5872-5876.pdf312.27 kBPDFView/Open
Please use this identifier to cite or link to this item:http://hdl.handle.net/2115/44875

Title: Action spectrum analyses of photoinduced superhydrophilicity of titania thin films on glass plates
Authors: Yan, X. Browse this author
Abe, R. Browse this author
Ohno, T. Browse this author
Toyofuku, M. Browse this author
Ohtani, B. Browse this author
Keywords: Titania thin film
Spin coating
Photoinduced superhydrophilicity
Water contact angle
Photocatalytic reaction
Issue Date: 1-Jul-2008
Publisher: Elsevier B.V.
Journal Title: Thin Solid Films
Volume: 516
Issue: 17
Start Page: 5872
End Page: 5876
Publisher DOI: 10.1016/j.tsf.2007.10.033
Abstract: Samples of titania-thin-film-coated glass plates were prepared by spin coating of commercial titania-coating liquids using a home-made spin coater (1000 rpm, 30 s) and then calcined in air at 673 K for 2 h. In a part of experiments, samples were stored in an oven at 393 K overnight. A piece of sample was set in a 10-mm rectangular quartz cell, and monochromatic light (FWHM of ca. 17 nm, intensity of ca. 10^[8] einstein s^[-1]) was irradiated in ambient air using a grating multiple-wavelength photoirradiation instrument (Jasco CRM-FD). Water contact angle (WCA) of samples before and after monochromatic irradiation was measured by a contact angle analyzer. Changes in WCA, as a function of wavelength of monochromatic irradiation, a kind of action spectrum, of several titania samples showed that the sample surfaces became superhydrophilic, i.e., WCA became almost zero, only under irradiation with a wavelength shorter than the absorption edge, corresponding to the band gap, of samples. Analysis of changes in WCA showed that there are at least two stages when the samples stored at 393 K overnight before irradiation to give relatively high WCA of ca. 40 deg. were used: first stage of WCA > 10 deg. and second stage of WCA < 10 deg.. The action spectra of WCA change in these two stages are discussed.
Type: article (author version)
URI: http://hdl.handle.net/2115/44875
Appears in Collections:触媒科学研究所 (Institute for Catalysis) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 大谷 文章

Export metadata:

OAI-PMH ( junii2 , jpcoar )

MathJax is now OFF:


 

 - Hokkaido University