Photocatalytic activities and crystal structures of titanium dioxide by anodization: Their dependence upon current density

Yoshiteru Mizukoshi, Naoya Masahashi

研究成果: Article査読

13 被引用数 (Scopus)

抄録

The crystal structure, crystallinity and surface area of anodized TiO 2 were systematically investigated focusing on the current density in the anodization. Anatase phase was evolved with an increase of the current density for the anodic oxides prepared in the electrolyte of 0.1 mol·L-1 sulfuric acid, and the surface area was almost constant against the current density. On the other hand, rutile phase was evolved with the same of 1.2 mol·L-1 sulfuric acid, and the surface area increased with the current density. Photocatalytic degradation rates of methylene blue (MB) were normalized by surface area of TiO2, showing that the maximum value was found in the anodic oxide with approximately 60% of rutile in the fraction. The specific rate constant for MB degradation was the best in the anodic oxide with low lattice strain and the crystallite size of appropriately 40 nm.

本文言語English
ページ(範囲)1443-1448
ページ数6
ジャーナルMaterials Transactions
51
8
DOI
出版ステータスPublished - 2010 8

ASJC Scopus subject areas

  • 材料科学(全般)
  • 凝縮系物理学
  • 材料力学
  • 機械工学

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