Large-scale preparation of ordered titania nanorods with enhanced photocatalytic activity

Jin Ming Wu, Tian Wei Zhang, Yue Wu Zeng, Satoshi Hayakawa, Kanji Tsuru, Akiyoshi Osaka

研究成果: Contribution to journalArticle査読

175 被引用数 (Scopus)

抄録

A titania layer with ordered nanostructures is expected to be of high photocatalytic activity due mainly to its high specific surface area. In the present work, large-area films with ordered titania nanorods were deposited on titanium substrates through a solution approach. The nanorods, with the phase composition of a mixture of anatase and rutile, grew on top of a condensed anatase interlayer along mainly the rutile [001]-axis. The photocatalytic activity was evaluated by decomposing rhodamine B in water and compared with the general sol-gel derived titania films and a commercial DP-25 titania coating. It is found that the as-deposited titania nanorods exhibited extremely high initial photocatalytic activity but declined to a poor value after the consumption of beneficial oxidative peroxo complexes coordinated to Ti(IV). A subsequent thermal treatment eliminated such complexes but at the same time improved the crystallinity of the titania nanorods. The photocatalytic activity of the thermally treated titania nanorods was stable and significantly higher than that of the sol-gel derived film and commercial DP-25 coating.

本文言語英語
ページ(範囲)6995-7002
ページ数8
ジャーナルLangmuir
21
15
DOI
出版ステータス出版済み - 7 19 2005

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Spectroscopy
  • Electrochemistry

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