| Issue |
Korean Chemical Engineering Research,
Vol.48, No.4, 417-422, 2010
Vol.48, No.4, 417-422, 2010
수열합성법에 의한 과산화티탄 수용액으로부터 이산화티탄의 합성 및 메틸렌블루의 광분해반응
Synthesis of Titanium Dioxides from Peroxotitanate Solution Using Hydrothermal Method and Their Photocatalytic Decomposition of Methylene Blue
서로 다른 관능기를 가진 카르복시산 화합물을 첨가제로 하여 과산화티탄 수용액으로부터 수열합성법으로 나노 크기의 이산화티탄을 제조하였다. 제조된 나노 크기의 이산화티탄의 물리적 성질을 조사하였으며, 이들을 사용하여 메틸렌블루의 광분해 반응에서의 활성을 조사하였다. 첨가된 카르복시산 화합물에 관계없이 아나타제형 나노 크기의 이산화티탄이 합성되었으며, 소성온도가 700 ℃ 이상에서는 아나타제 결정구조가 루틸 결정구조로 변환되기 시작하였다. 광촉매 반응의 활성은 카르복시산의 탄소수가 커질수록 증가하였으며, 숙신산을 첨가제로 한 경우와 500 ℃에서 소성시킨 경우에 가장 높은 활성을 보여주었다.
Nanosized TiO2 particles were prepared by hydrothermal method from the aqueous peroxotitanate solution using the different carboxylic acids as an additives. The physical properties of prepared nanosized TiO2 particles were investigated and we also examined the activity of TiO2 particles as a photocatalyst on the decomposition of methylene blue. The major phase of all the prepared TiO2 particles was an anatase structure regardless of carboxylic acids and a rutile peak was observed above 700 ℃. The photocatalytic activity increased with an increase of hydrocarbon number of carboxylic compounds and the highest activity was shown on the catalysts which was prepared using succinic acid as an additive and calcined at 500 ℃.
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