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  • 03월 03일 12시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

Preparation of Porous Silica with Pillared and Layered Phases: simultaneous Intercalation of Amine-TEOS into H+- Kenyaite and Intragallery Amine-Catalyzed Hydrolysis of TEOS

등록일
2006년 2월 16일 10시 25분 44초
접수번호
0934
발표코드
29P194포 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
금 <발표Ⅱ>
발표형식
포스터
발표분야
물리화학
저자 및
공동저자
박경원, 김재상, 권오윤1
경상대학교 화학과,
1여수대학교 화학공학과,
Porous silica-pillared H+-kenyaite were prepared by intragallery amine-catalyzed hydrolysis of TEOS [tetraethylorthosilicate, Si(OC2H5)4]. Mixtures of H+-kenyaite , dodecylamine, and TEOS at molar ratios of 1:3:8-10 and 1:6-8:10 resulted in swollen and viscous gel once at room temperature, allowing intercalation compounds in which dodecylamine and TEOS were simultaneously intercalated into interlayers of H+-kenyaite. The hydrolysis of the gallery TEOS was conducted in water solution for 40 min at room temperature, affording siloxane-pillared H+-kenyaites with a gallery height of between 5.1 and 5.31nm. Calcination of samples at 600, 700, 800℃ in air resulted in silica-pillared kenyaites with large specific surface areas between 355 and 840 m2/g, depending on the reaction stoichiometry. The reaction at H+-kenyaite :dodecylamine: TEOS reaction stoichiometries of 1:3:8 and 1:6:10 resulted in optimum specific surface areas and mesopores with a narrow pore size distribution. Result indicates that the intragallery amine catalyzes the hydrolysis of gallery TEOS and simultaneously has a role of gallery-templated micellar assemblies

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