抄録
Here we report on our investigation on photocatalytic oxidation (PCO) of gaseous methanol with WO 3-TiO 2 composite films. WO 3 and WO 3-TiO 2 composite thin films were prepared by drop casting method. PCO of gaseous methanol and hydrogen generation process on platinum loaded WO 3-TiO 2 composite thin films in high vacuum were investigated using a home-made reactor with a six-channel quadrupole mass spectrometer at real-time scale under UVA (300-400 nm) light illumination. In the case of Pt loaded WO 3 thin films, PCO of gaseous methanol proceeds through intermediates viz. formaldehyde, CO and finally to CO 2 and H 2. PCO of gaseous methanol occurs via direct hole transfer over Pt loaded WO 3 thin films. On the other hand, PCO of gaseous methanol over Pt loaded WO 3-TiO 2 composite thin films proceeds with competitive direct and indirect hole transfer reactions. Our real-time analysis of gas phase photocatalysis realized the identification of direct and indirect hole transfer processes and the reaction intermediates thereof.
| 本文言語 | English |
|---|---|
| ページ（範囲） | 3847-3851 |
| ページ数 | 5 |
| ジャーナル | Thin Solid Films |
| 巻 | 520 |
| 号 | 10 |
| DOI | |
| 出版ステータス | Published - 2012 3月 1 |
| 外部発表 | はい |
ASJC Scopus subject areas
- 電子材料、光学材料、および磁性材料
- 表面および界面
- 表面、皮膜および薄膜
- 金属および合金
- 材料化学