Visible-light induced photocatalytic activity of TiO2−A (A = N, S) prepared by precipitation route
| Autor: | Tsugio Sato, Ken Ihara, Shu Yin, Masakazu Komatsu, Yohei Aita |
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| Rok vydání: | 2006 |
| Předmět: |
Chemistry
Brookite General Chemical Engineering Inorganic chemistry General Physics and Astronomy chemistry.chemical_element General Chemistry Nitrogen chemistry.chemical_compound Hydroxylamine Thiourea Rutile visual_art Specific surface area visual_art.visual_art_medium Photocatalysis Hexamethylenetetramine |
| Zdroj: | Journal of Photochemistry and Photobiology A: Chemistry. 179:105-114 |
| ISSN: | 1010-6030 |
| Popis: | Nitrogen doped or nitrogen/sulfur co-doped titania photocatalyst TiO 2− x A y (A = N, S) which can be excited by visible light were prepared by mixing aqueous TiCl 3 solutions with various nitrogen sources such as hydroxylamine (NH 2 OH), hexamethylenetetramine (HMT, C 6 H 12 N 4 ), urea ((NH 2 ) 2 CO) and thiourea ((NH 2 ) 2 CS) followed by hydrothermal treatment at 190 °C. The titania powders prepared using hydroxylamine consisted of rutile crystals with non-homogeneous size distribution. The nitrogen doped titania powders prepared using hexamethylenetetramine consisted of mainly mono-size spherical brookite crystals, whereas those using urea and thiourea consisted of belt-like rutile particles. The TiO 2− x A y (A = N, S) powders showed excellent visible-light absorption and photocatalytic ability for the oxidative destruction of nitrogen monoxide under irradiation of visible light. The effect of reaction solvents on the phase composition, specific surface area and photocatalytic activity was also characterized. |
| Databáze: | OpenAIRE |
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