HUSCAP logo Hokkaido Univ. logo

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

Photochemical hydrogen evolution from aqueous triethanolamine solutions sensitized by binaphthol-modified titanium(IV) oxide under visible-light irradiation

Files in This Item:
JPAP2003-160-1-2.pdf775.89 kBPDFView/Open
Please use this identifier to cite or link to this item:http://hdl.handle.net/2115/14647

Title: Photochemical hydrogen evolution from aqueous triethanolamine solutions sensitized by binaphthol-modified titanium(IV) oxide under visible-light irradiation
Authors: Ikeda, Shigeru Browse this author
Abe, Chigusa Browse this author
Torimoto, Tsukasa Browse this author
Ohtani, Bunsho Browse this author →KAKEN DB
Keywords: Titanium(IV) oxide
1,1'-Binaphthalene-2,2'-diol
Surface complex
Visible light
Sensitization
Photocatalytic reaction
Issue Date: 7-Aug-2003
Publisher: Elsevier Science B.V.
Journal Title: Journal of Photochemistry and Photobiology A Chemistry
Volume: 160
Issue: 1-2
Start Page: 61
End Page: 67
Publisher DOI: 10.1016/S1010-6030(03)00222-3
Abstract: Surface modification of titanium(IV) oxide (TiO2) powders with 1,1'-binaphthalene-2,2'-diol (bn(OH)2), having two phenolic hydroxyls and atropisomeric chirality, in refluxed ethanol led to the formation of a deep yellow-colored surface complex, giving visible-light absorption at a wavelength below ca. 550–600 nm. Quantitative analyses of the surface complex revealed that absorption intensity at 450 nm in diffuse reflection (DR) measurement was almost proportional to its amount and that its amount depended strongly on the amount of surface hydroxyl groups of TiO2 but not on the crystal structure of TiO2, anatase, and rutile. The bn(OH)2 complexation was also applied to platinized TiO2 to drive photocatalytic molecular hydrogen (H2) evolution from deaerated triethanolamine solutions under visible-light irradiation at a wavelength even longer than 540 nm. The photonic efficiency of the photocatalytic reaction at 450 nm was estimated to be 0.02% for bn(OH)2-modified TiO2 (JRC-TIO-3) loaded with 0.1 wt.% of platinum. On the basis of these experimental results, the reaction mechanism, which involves visible-light excitation of the surface complex, injection of electrons from the complex to TiO2, and migration of the electrons to platinum deposits, where reduction of H+ takes place to give H2, was elucidated.
Relation: http://www.sciencedirect.com/science/journal/10106030
Type: article (author version)
URI: http://hdl.handle.net/2115/14647
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