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Photo-induced properties of non-annealed anatase TiO2 mesoporous film prepared by anodizing in the hot phosphate/glycerol electrolyte

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Title: Photo-induced properties of non-annealed anatase TiO2 mesoporous film prepared by anodizing in the hot phosphate/glycerol electrolyte
Authors: Taguchi, Yoshiaki Browse this author
Tsuji, Etsushi Browse this author
Aoki, Yoshitaka Browse this author →KAKEN DB
Habazaki, Hiroki Browse this author →KAKEN DB
Keywords: Anodic TiO2 mesoporous film
Non-annealing procedures
Phosphate/glycerol electrolyte
Photo-induced properties
Issue Date: 1-Oct-2012
Publisher: Elsevier B.V.
Journal Title: Applied Surface Science
Volume: 258
Issue: 24
Start Page: 9810
End Page: 9815
Publisher DOI: 10.1016/j.apsusc.2012.06.035
Abstract: In this study, anatase crystalline TiO2 mesoporous film were formed by anodizing of titanium specimens without annealing procedures. The specimens were anodized at 3 and 20 V in 0.6 mol dm^[-3] K2HPO4 and 0.2 mol dm^[-3] K3PO4/glycerol electrolyte at 433 K. The obtained films had mesoporous structures with pore diameters as small as ~10 nm. The mesoporous film formed at 20 V without annealing (MP-20V) was a mixture of amorphous phase and nanograined anatase, which clearly showed strong <001> preferred orientation, whereas that at 3 V was completely amorphous. Even without annealing, the MP-20V showed high photocatalytic activities for decomposition of water and methylene blue. In contrast, the anodic TiO2 nanotube film formed in NH4F/ethylene glycol electrolyte revealed photocatalytic activities only after annealing at 723 K, because of the amorphous nature of the as-anodized nanotube film. The MP-20V film also showed superhydrophilicity with UV light irradiation.
Type: article (author version)
URI: http://hdl.handle.net/2115/50155
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 辻 悦司

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