Photocatalytic activities for partial oxidation of α-methylstyrene over zeolite-supported titanium dioxide and the influence of water addition to reaction solvent
✍ Scribed by Syuhei Yamaguchi; Tomohiro Fukura; Youhei Imai; Hiroyuki Yamaura; Hidenori Yahiro
- Publisher
- Elsevier Science
- Year
- 2010
- Tongue
- English
- Weight
- 391 KB
- Volume
- 55
- Category
- Article
- ISSN
- 0013-4686
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✦ Synopsis
The photocatalytic reaction in the partial oxidation of ␣-methylstyrene (␣-MS) to acetophenone (AP) was investigated for TiO 2 supported on H-ZSM-5 (H-MFI), H-mordenite (H-MOR), and H-Y-type (H-FAU) zeolites. XRD results demonstrated that the anatase was the stable phase of TiO 2 supported on zeolites. Photocatalytic activities of supported catalysts decreased in the following order: TiO 2 /H-MFI » TiO 2 /H-MOR > (TiO 2 ) > TiO 2 /H-FAU » (blank). TiO 2 /H-MFI catalyst exhibited the best performance for photocatalytic oxidation of ␣-MS to AP. The maximal activity was obtained by 25 wt% TiO 2 /H-ZSM-5. The addition of water to the reaction solvent resulted in significantly lowering the photocatalytic activity for TiO 2 /H-ZSM-5 catalyst, although its activity for TiO 2 and TiO 2 + H-ZSM-5 mechanical mixture was little influenced by the amount of water added to reaction solvent.