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Stannic oxide-titanium dioxide coupled semiconductor photocatalyst loaded with polyaniline for enhanced photocatalytic oxidation of 1-octene
International Journal of Photoenergy (2007)
  • Hadi Nur, University Technology Malaysia
  • Izan Izwan Misnon, University Technology Malaysia
  • Lim Kheng Wei, University Technology Malaysia
Abstract

Stannic oxide-titanium dioxide (SnO2-TiO2) 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 SnO2 and followed by attachment of PANI onto a TiO2 powder to give sample PANI-SnO2-TiO2. The electrical conductivity of the system becomes high in the presence of PANI. Enhanced photocatalytic activity was observed in the case of PANI-SnO2-TiO2 compared to PANI-TiO2, SnO2-TiO2 and TiO2. A higher photocatalytic activity in the oxidation of 1-octene on PANI-SnO2-TiO2 than SnO2-TiO2, PANI-TiO2 and TiO2 can be considered as an evidence of enhanced charge separation of PANI-SnO2-TiO2 photocatalyst as confirmed by photoluminescence spectroscopy. It suggests that photoinjected electrons are tunneled from TiO2 to SnO2 and then to PANI in order to allow wider separation of excited carriers.

Keywords
  • Stannic oxide-titanium dioxide coupled semiconductor photocatalyst,
  • polyaniline,
  • 1-octene
Disciplines
Publication Date
July, 2007
Citation Information
Hadi Nur, Izan Izwan Misnon and Lim Kheng Wei. "Stannic oxide-titanium dioxide coupled semiconductor photocatalyst loaded with polyaniline for enhanced photocatalytic oxidation of 1-octene" International Journal of Photoenergy Vol. vol. 2007 Iss. Article ID 98548, 6 pages, 2007. doi:10.1155/2007/98548 (2007)
Available at: http://works.bepress.com/hadi_nur/36/