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Stannic oxide-titanium dioxide coupled semiconductor photocatalyst loaded with polyaniline for enhanced photocatalytic oxidation of 1-octene

Stannic oxide-titanium dioxide ( SnO 2 TiO 2) coupled semiconductor photocatalyst loaded with polyaniline (PANI), a conducting polymer, possesses a high photocatalytic activity in oxidation of 1-octene to 1,2-epoxyoctane with aqueous hydrogen peroxide. The photocatalyst was prepared by impregnation...

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நூற்பட்டியல் விவரங்கள்
தலைமை எழுத்தாளர்கள்: Nur, Hadi, Misnon, Izan Izwan, Wei, Lim Kheng
வடிவம்: கட்டுரை
வெளியீடப்பட்டது: Hindawi Publishing Corporation 2007
பகுதிகள்:
QD Chemistry
நிகழ்நிலை அணுகல்:http://eprints.utm.my/7313/
http://eprints.utm.my/7313/
http://eprints.utm.my/7313/
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விளக்கம்
தொகுப்பு:Stannic oxide-titanium dioxide ( SnO 2 TiO 2) coupled semiconductor photocatalyst loaded with polyaniline (PANI), a conducting polymer, possesses a high photocatalytic activity in oxidation of 1-octene to 1,2-epoxyoctane with aqueous hydrogen peroxide. The photocatalyst was prepared by impregnation of SnO 2 and followed by attachment of PANI onto a TiO 2 powder to give sample PANI- SnO 2 TiO 2 . The electrical conductivity of the system becomes high in the presence of PANI. Enhanced photocatalytic activity was observed in the case of PANI- SnO 2 TiO 2 compared to PANI- TiO 2, SnO 2 TiO 2, and TiO 2 . A higher photocatalytic activity in the oxidation of 1-octene on PANI- SnO 2 TiO 2 than SnO 2 TiO 2, PANI- TiO 2, and TiO 2 can be considered as an evidence of enhanced charge separation of PANI- SnO 2 TiO 2 photocatalyst as confirmed by photoluminescence spectroscopy. It suggests that photoinjected electrons are tunneled from TiO 2 to SnO 2 and then to PANI in order to allow wider separation of excited carriers.

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