Photocatalytic Activities and Crystal Structures of Titanium Dioxide by Anodization: Their Dependence upon Current Density
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- Mizukoshi Yoshiteru
- Osaka Center for Industrial Materials Research, Institute for Materials Research, Tohoku University
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- Masahashi Naoya
- Osaka Center for Industrial Materials Research, Institute for Materials Research, Tohoku University
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The crystal structure, crystallinity and surface area of anodized TiO2 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.
収録刊行物
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- MATERIALS TRANSACTIONS
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MATERIALS TRANSACTIONS 51 (8), 1443-1448, 2010
公益社団法人 日本金属学会
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詳細情報 詳細情報について
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- CRID
- 1390282679227269760
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- NII論文ID
- 10026513661
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- NII書誌ID
- AA1151294X
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- ISSN
- 13475320
- 13459678
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- HANDLE
- 10097/52185
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- NDL書誌ID
- 10768936
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- IRDB
- NDL
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- 使用不可