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http://dx.doi.org/10.5012/bkcs.2009.30.11.2613

Heterojunction of FeOOH and TiO2 for the Formation of Visible Light Photocatalyst  

Rawal, Sher Bahadur (Department of Chemistry, Inha University)
Chakraborty, Ashok Kumar (Department of Chemistry, Inha University)
Lee, Wan-In (Department of Chemistry, Inha University)
Publication Information
Bulletin of the Korean Chemical Society / v.30, no.11, 2009 , pp. 2613-2616 More about this Journal
Abstract
FeOOH/$TiO_2$, a heterojunction structure between FeOOH and $TiO_2$, was prepared by covering the surface of the $\sim$100-nm-sized FeOOH particles with Degussa P25 by applying maleic acid as an organic linker. Under visible light irradiation (${\lambda}{\geq}$ 420 nm), FeOOH/$TiO_2$ showed a notable photocatalytic activity in removal of gaseous 2-propanol and evolution of $CO_2$. 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 $TiO_2$. The considerable photocatalytic efficiency of the FeOOH/$TiO_2$ under visible light irradiation was therefore deduced to be caused by the hole transfer between the VB of FeOOH and $TiO_2$.
Keywords
Heterojunction; Photocatalyst; Visible light; FeOOH/$TiO_{2}$; FeOOH;
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