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나노크기 TiO2 제조 및 광촉매에 의한 페놀 광분해
Preparation of Nano-Size TiO2 Particles and Photo-Degradation of Phenol by Photocatalysts
강원대학교 공과대학 화학공학과, 춘천 200-701 1강원대학교 신소재공학과, 춘천 200-701
1Department of Chemical Engineering, Kangwon National University, Chunchon 200-701, Korea 2(주) 녹십자, Korea 3Department of Advanced Materials Science Engineering, Kangwon National University, Chunchon 200-701, Korea
HWAHAK KONGHAK, August 2002, 40(4), 516-522(7), NONE
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Abstract
본 연구에서는 확산형 화염 반응기를 사용하여 공정변수 변화에 따라 TiO2 입자를 제조하였고 제조된 TiO2 입자들의 물성을 분석하였다. 또한 slurry 형 광촉매 반응기에서 제조된 TiO2 광촉매를 사용하여 페놀의 광분해를 분석하였다. 원료/산소의 공급 유량비가 증가할수록, 초기 TiCl4 공급 농도가 증가할수록, 전체 기체 유량이 감소할수록 TiO2 입자의 평균 크기는 증가한다. TiO2 입자의 비표면적은 초기 TiCl4 공급 농도가 증가함에 따라 감소한다. TiO2 광촉매의 평균 입자 크기가 감소할수록, O2 공급 유량이 증가할수록, 페놀의 광분해 속도는 증가한다. TiO2 입자의 anatase 조성의 양이 많을수록 페놀의 광분해 속도는 높게 나타난다.
The nano-sized TiO2 particles by the diffusion flame reactor were prepared and the effects of several process variables on the properties of TiO2 particles were investigated. The photo-degradation of phenol was also analyzed with the prepared TiO2 particles in the slurry type photocatalytic reactor. As the fuel/O2 input ratio or inlet TiCl4 concentration increases or as the total gas flow rate decreases, the TiO2 particles size increases. The specific surface area of TiO2 particles decreases as the inlet TiCl4 concentration increases. As the TiO2 particle size decreases or as the O2 flow rate increases, the photo-degradation efficiency of phenol increases by the faster photo-degradation rate. The larger the amount of anatase phase in TiO2 particles, the higher the photo-degradation efficiency of phenol is.
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