Specific photocatalytic performance of nanostructured rutile-type Tio2: Selective oxidation of thiazin dye with a bundled architecture consisting of oriented nanoneedles

Yu Tokunaga, Hiroaki Uchiyama, Yuya Oaki, Hiroaki Imai

研究成果: Article

15 引用 (Scopus)

抄録

The photocatalytic activity of a nanostrcutured rutile consisting of oriented nanoneedles was studied by comparing a reaction of a thiazin dye, methylene blue, with dispersed rutile nanoneedles and anatase nanoparticles. Demethylation of methylene blue occurred preferably through partial oxidation under UV irradiation with the bundled rutile nanoneedles having small clearance gaps. On the other hand, most of the dye molecules were directly decolorized through the initiation by a reductive pathway with the dispersed rutile nanorods and the anatase nanoparticles. The reductive sites on (110) of the rutile nanoneedles were dominantly located in the small gaps inside the bundled architecture. Because the diffusion of large-sized organic molecules to the reductive sites would be restricted, the oxidative route for the dye molecule was selectively induced with the rutile bundles under UV irradiation.

元の言語English
ページ(範囲)69-73
ページ数5
ジャーナルScience of Advanced Materials
2
発行部数1
DOI
出版物ステータスPublished - 2010 3

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Nanoneedles
Coloring Agents
Dyes
Oxidation
Titanium dioxide
Molecules
Irradiation
Nanoparticles
Methylene Blue
Nanorods
titanium dioxide

ASJC Scopus subject areas

  • Materials Science(all)

これを引用

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abstract = "The photocatalytic activity of a nanostrcutured rutile consisting of oriented nanoneedles was studied by comparing a reaction of a thiazin dye, methylene blue, with dispersed rutile nanoneedles and anatase nanoparticles. Demethylation of methylene blue occurred preferably through partial oxidation under UV irradiation with the bundled rutile nanoneedles having small clearance gaps. On the other hand, most of the dye molecules were directly decolorized through the initiation by a reductive pathway with the dispersed rutile nanorods and the anatase nanoparticles. The reductive sites on (110) of the rutile nanoneedles were dominantly located in the small gaps inside the bundled architecture. Because the diffusion of large-sized organic molecules to the reductive sites would be restricted, the oxidative route for the dye molecule was selectively induced with the rutile bundles under UV irradiation.",
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