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Synthesis of Nano-Scale Photocatalyic TiO2 Powder Doped with Ag by Sonochemistry Reaction

초음파화학 반응에 의한 Ag 도핑 광촉매용 나노 TiO2 분말의 합성

  • Cho, Sung-Hun (Department of Chemical Engineering, Sunmoon University) ;
  • Lee, Soo-Whon (Department of Environmental Engineering, Sunmoon University Ecointerface LAB)
  • 조성훈 (선문대학교 전자재료공학과) ;
  • 이수완 (선문대학교 친환경계면공학 연구실)
  • Published : 2009.03.27

Abstract

In chemistry, the study of sonochemistry is concerned with understanding the effect of sonic waves and wave properties on chemical systems. In the area of chemical kinetics, it has been observed that ultrasound can greatly enhance chemical reactivity in a number of systems by as much as a million-fold. Nano-technology is a super microscopic technology in which structures of 100 nanometers or smaller can be investigated. This technology has been used to develop $TiO_2$ materials and $TiO_2$ devices of that size. Thus far, electrochemistry methods and photochemistry methods have generally been used to create $TiO_2$ nano-size particles. However, these methods are complicated and create pollutants as a by-product. In the present study, nano-scale silver particles (5 nm) were prepared in a sonochemistry method. Sonochemistry deals with mechanical energy that is provided by the collapse of cavitation bubbles that form in solutions during exposure to ultrasound. $TiO_2$ powders 25 nm in size doped with Ag were formed using an ultrasonic sound technique. The experimental results showed the high possibility of removing pollution through the action of a photocatalyst. This powder synthesis technique can be considered as an environmentally friendly powder-forming processing owing to its energy saving characteristics.

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