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http://dx.doi.org/10.5012/bkcs.2009.30.3.675

High Photocatalytic Activity of Gd2O2S:Tb Modified Titanium Dioxide Films  

Kim, Bum-Goo (Department of Chemistry, Dongguk University)
Lee, Hak-Guen (Department of Chemistry, Dongguk University)
Kim, Hee-Sung (SamMyung Bio Chem Co., Ltd.)
Kim, Young-Soon (Department of Chemistry, Dongguk University)
Publication Information
Bulletin of the Korean Chemical Society / v.30, no.3, 2009 , pp. 675-678 More about this Journal
Abstract
$Fe_2O_3,\;Ag_2O,\;CaWO_4$ and $Gd_2O_2S$:Tb loaded on titanium dioxide photocatalysts (P25, Degussa) were prepared by a calcination. Their composite films containing water-born polyurethane used as a material for immobilization were obtained by spray coating technique. The photocatalytic activity of the titanium dioxide films was characterized by decrease of UV-vis absorption spectra for methylene blue and gas chromatography for photocatalytic decomposition of formaldehyde diluted in water. It was shown that the $Gd_2O_2S$:Tb modified titanium dioxide films had good photocatalytic properties and followed the first-order kinetic model with regard to photocatalytic decoloration of methylene blue. Especially in formaldehyde photodegradation experiment, decrease rate of concentration of the titanium dioxide films with $Gd_2O_2S$:Tb modifying was about 35% larger than that of the unloaded titanium dioxide film.
Keywords
Titanium dioxide; $Gd_2O_2S$:Tb; Photocatalysts; PL;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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