High Photocatalytic Activity of Gd2O2S:Tb Modified Titanium Dioxide Films

Bulletin of the Korean chemical society

Hee Sung Kim¹  Hak Guen Lee¹  Young Soon Kim¹  Bum Goo Kim¹ 

关键词: Titanium dioxide;    Gd2O2S:Tb;    Photocatalysts;    PL;   

DOI  :  

学科分类：化学（综合）

来源: Korean Chemical Society

【 摘 要 】

Fe2O3, Ag2O, CaWO4 and Gd2O2S: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 Gd2O2S: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 Gd2O2S:Tb modifying was about 35% larger than that of the unloaded titanium dioxide film.

【 授权许可】

Unknown