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티타니아 담지 MCM-41 및 KIT-1 메조포러스 물질의 수열 안정성 및 흡착성질
Hydrothermal Stabilities and Adsorption Properties of Titania Loaded on MCM-41 and KIT-1 Mesoporous Materials
HWAHAK KONGHAK, June 1998, 36(3), 364-368(5), NONE
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Abstract
티타니아 담지로 인한 MCM-41과 KIT-1 메조포러스 물질의 수열 안정성 변화를 조사하였다. MCM-41 메조포러스 물질은 수열처리에 약하지만, 티타니아를 담지시키면 수열 안정성이 뚜렷이 향상된다. 티타니아가 담지된 KIT-1 메조포러스 물질은 85℃와 상대습도 85%인 조건에서 110시간 수열처리하여도 결정구조나 질소 흡착등온선에 차이가 없을 만큼 수열 안정성이 매우 우수하였다. 물의 흡착량은 티타니아 담지로 크게 줄어들었으나, 시클로헥산의 흡착량은 달라지지 않았다. 메조포러스 물질의 티타니아 담지로 인한 수열 안정성 향상은 친수 흡착점의 감소에 기인한다고 설명되었다
The changes in hydrothermal stabilities and adsorption properties of MCM-41 and KIT-1 mesoporous materials with titania loading were investigated. The MCM-41 mesoporous material was weak to hydrothermal treatment, but titania loading brought about the improvement of hydrothermal stability. The titania-loaded KIT-1 mesoporous material showed an excellent hydrothermal stability, so there were no remarkable differences in X-ray diffraction pattern and adsorption isotherm of nitrogen, even after hydrothermal treatment of 80℃ and 85% of relative humidity for 110h. The uptake of water was decreased considerably by titania loading, while that of cyclohexane was not altered. The partial loss of hydrophilic site for water adsorption on mesoporous materials gave rise to improve the hydrothermal stability.
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