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티타니움이 치환된 Silicalite(TS-1)의 제조 및 특성분석
Synthesis and Characterization of Titanium Silicalite-1(TS-1)
HWAHAK KONGHAK, December 1998, 36(6), 908-912(5), NONE
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Abstract
과산화수소를 이용한 탄화수소의 선택적인 산화반응에 유용한 촉매인 Titanium Silicalite-1(TS-1)의 제조와 특성분석에 관하여 XRD, FT-IR, Raman, TGA, SEM등을 이용하여 연주하였다. XRD를 이용하여 MFI구조의 생성을 확인하였으며, FT-IR은 MFI의 구조 생성과 아울러 그 격자내에 T가 치환되었음을 확인시켜 주었다. Ti의 양이 2.0 atomic %가 넘을 때는 부산물로서 anatase형의 TiO2가 생성됨을 Raman분광법으로써 확인하였다. 생성된 TS-1은 650℃까지는 열적으로 안정하여 0.25 μm정도의 균일한 입자크기를 가진 원통형 형상을 보였다. 합성과정 중 MFI구조는 170℃의 결정화 과정에서 형성되며 Ti가 silicalite격자내로 치환되는 시기는 550℃의 소성단계였다.
Synthesis and characterization of titanium silicalite-1(TS-1) have been studied by using XRD, FT-IR, Raman, TGA and SEM. The MFI structure of the prepared sample was confirmed by XRD and the results of FT-IR provided evidence of MFI structure and the substitution of Ti into silicalite lattice. When Ti content exceeded 2 atomic %, some Ti formed anatase TiO2 particles which was characterized by Raman spectroscopy. The product TS-1 was thermally stable up to 650℃ and formed cylinderical particles of uniform size of ca. 0.25 μm. The MFI structure was formed during crystallization step at 170℃ and Ti substitution into silicalite lattice occurred during calcination step at 550℃.
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