Journal of the Korean Applied Science and Technology (한국응용과학기술학회지)

The Korean Society of Applied Science and Technology (한국응용과학기술학회)
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Preparation of $TiO_2$ Powder by Sol-Gel Method and Their Photocatalytic Decomposition Effect of Synthetic Detergents for Kitchen Use

졸-겔법에 의한 $TiO_2$ 분체 합성 및 주방용 합성세제의 광분해 효과

  • 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)
  • 정용준 (대구기능대학 환경화학과) ;
  • 류완호 (한밭대학교 에너지 청정기술연구소) ;
  • 양천희 (한밭대학교 화학공학과)
  • Published : 2004.06.30
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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.

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