| Autor: |
Kensuke Araki, Nobuo Fujinaga, Suzuko Yamazaki |
| Rok vydání: |
2001 |
| Předmět: |
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| Zdroj: |
Applied Catalysis A: General. 210:97-102 |
| ISSN: |
0926-860X |
| DOI: |
10.1016/s0926-860x(00)00797-3 |
| Popis: |
We have found that the use of sulfuric acid in the peptization process of sol–gel method produced SO 4 2− -incorporated TiO 2 which is mechanically strong by firing at low temperature such as 200°C. The synthesized TiO 2 has larger specific surface area and retards the phase transition from anatase to rutile compared with that prepared from the peptization with nitric acid. The S-content of the TiO 2 fired at 200°C was 1.52 wt.%; the value has a maximum of 2.74 wt.% at 400°C. The XPS measurements indicate that S exists mainly as SO 4 2− . The TiO 2 fired at 400°C showed the highest photocatalytic activity for ethylene degradation. Especially, we would like to emphasize the TiO 2 sintered at 200°C because they are extremely hard in spite of such a low sintering temperature. This photocatalyst may provide a great opportunity for extensive applications as self-supporting membranes. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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