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화학기상증착법으로 제조한 TiO2 막의 광촉매 활성
Photocatalytic Activity of the TiO2 Film Grown by Chemical Vapor Deposition
순천대학교 환경공학과, 순천 540-742 1목포대학교 환경교육과, 목포 530-730 2여수대학교 건설/환경공학부, 여수 550-749
Dept. of Environ. Eng., Sunchon National Univ., Sunchon 540-742, Korea 1Dept. of Environ. Education, Mokpo National Univ., Mokpo 530-730, Korea 2Division of Civil and Environ. Eng., Yosu National Univ., Yosu 550-749, Korea
jsc@sunchon.ac.kr
HWAHAK KONGHAK, August 2001, 39(4), 385-389(5), NONE
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Abstract
제조방법을 달리하여 TiO2광촉매 막을 합성하였고, 제조방법에 따른 광촉매 분해 특성을 메틸렌블루의 광분해를 통하여 검토하였다. 전구체로 titanium tetraisopropoxide를 이용하여 아나타제 결정구조의 TiO2 막을 알루미나구 위에 화학기상증착법(CVD)과 졸-겔법으로 제조하였다. CVD법으로 만든 TiO2 광촉매는 메틸렌블루 용액의 순환속도가 빠를 때와 단파장대의 UV램프에서 좋은 특성을 나타내었다. 화학기상증착법으로 제조한 광촉매가 졸-겔법의 광촉매보다 약 5배정도 광촉매 활성이 높게 나타났다.
Using the different preparation methods, we synthesized TiO 2 photocatalyst coatings and examined the photocatalytic decomposition of methylene blue using them. Anatase TiO2 coatings on alumina balls were prepared by Chemical Vapor Deposition(CVD) or sol-gel methods using titanium tetraisopropoxide as a precursor. In the case of CVD-grown TiO2 photo-catalysts, the high circulation rate of methylene blue solution and the short mean wavelength of UV lamp resulted in better decomposition activity of methylene blue. CVD-grown TiO2 photocatalyst was found to be five times more active than the TiO2 photocatalyst from sol-gel method.
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