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에어로솔 반응기에서 크기가 조절된 아나타제 티타니아 입자의 광촉매 반응성
Photocatalytic Activity of Anatase Titania Particles of Controlled Size Prepared in an Aerosol Reactor
HWAHAK KONGHAK, February 1998, 36(1), 116-119(4), NONE
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Abstract
티타늄테트라이소프로폭사이드(TTIP)를 에어로솔 반응기에서 기상 열분해시켜 결정상이 아나타제이며, 크기가 26-90nm인 티타니아 입자를 제조하여 삼염화에탄의 광촉매 분해 반응속도에 입자의 크기가 미치는 영향을 조사하였다. 제조된 광촉매는 입자의 크기가 감소함에 따라 자외선 흡수도가 blue shift하였다. 평균 파장이 350nm인 자외선 램프에 의한 삼염화에탄의 촉매 단위 면적당 광촉매 반응속도는 촉매 입자의 크기가 증가함에 따라 1.5x10-6에서 3.5x10-6(mole TCE/m2 min)으로 증가하는 현상을 보였다.
The anatase titania particles of 26 to 90 nm in diameter were prepared by thermal decomposition of titanium tetraisopropoxide(TTIP) in an aerosol reactor, and the effect of catalyst size on the photocatalytic degradation of trichloroethylene(TCE) was examined. The UV absorbance of titania particles was blue shifted as the particles size was decreased. The initial removal rate of TCE on the UV lamp with the average wave length of 350nm was increased from 1.5×10-6 to 3.5×10-6(mole TCE/m2 min) as the particle size increased.
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