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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 30, Number 11
BKCSDE 30(11)
November 20, 2009 

 
Title
Heterojunction of FeOOH and TiO2 for the Formation of Visible Light Photocatalyst
Author
Sher Bahadur Rawal, Ashok Kumar Chakraborty, Wan In Lee*
Keywords
Heterojunction, Photocatalyst, Visible light, FeOOH/TiO2, FeOOH
Abstract
FeOOH/TiO2, a heterojunction structure between FeOOH and TiO2, was prepared by covering the surface of the ~100-nm-sized FeOOH particles with Degussa P25 by applying maleic acid as an organic linker. Under visible light irradiation (λ ≥ 420 nm), FeOOH/TiO2 showed a notable photocatalytic activity in removal of gaseous 2-propanol and evolution of CO2. It was found that FeOOH reveals a profound absorption in the spectral range of 400 - 550 nm, and its valence band (VB) level is located relatively lower than that of TiO2. The considerable photocatalytic efficiency of the FeOOH/TiO2 under visible light irradiation was therefore deduced to be caused by the hole transfer between the VB of FeOOH and TiO2.
Page
2613 - 2616
Full Text
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