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http://dx.doi.org/10.12925/jkocs.2004.21.2.5

Preparation of $TiO_2$ Powder by Sol-Gel Method and Their Photocatalytic Decomposition Effect of Synthetic Detergents for Kitchen Use  

Chung, Young-Joon (Dept of Environmental and Chemical Engineering, Daegu Polytechnic College)
Roo, Wan-Ho (Dept. of Chemical Engineering, Hanbat National University RCECT)
Yang, Chun-Hoe (Dept. of Chemical Engineering, Hanbat National University)
Publication Information
Journal of the Korean Applied Science and Technology / v.21, no.2, 2004 , pp. 140-147 More about this Journal
Abstract
An aqueous solution of a commercial liquid synthetic detergent for kitchen use was photodecomposed in the presence of titanium dioxides powder under an atmosphere of air at room temperature. Titanium dioxides were prepared by sol-gel method from titanium iso-propoxide at different R ratio($H_2O$/titanium iso-propoxide) and calcined at $500^{\circ}C$. All titanium dioxides were characterized by XRD, BET surface area analyzer and UV-VIS spectrometer. The surface area of titanium dioxides prepared at R ratio=6 appeared higher volume about 20% than commercial $TiO_2$ catalysts. XRD patterns of titania particles were observed mixing phase together with rutile and anatase type. Titanium dioxides prepared by sol-gel method show higher activity about 6% than commercial $TiO_2$ catalysts on the photocatalytic degradation of a commercial liquid synthetic detergent for kitchen. The concentration of the detergent decreased to about 90% of its initial value at illumination times of 2 hour. Illumination for 30 minutes decreased the concentration of oxygen to about one-fifth of the initial value.
Keywords
synthetic detergent for kitchen use; titanium dioxides; sol-gel method; photocatalytic degradation;
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