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학술발표회초록보기

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  • 03월 02일 17시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제109회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Generation of Three-Level Pore Hierarchy in Nanoscale by Zeolite-Structure-Directing Surfactant

등록일
2012년 2월 16일 15시 33분 30초
접수번호
1058
발표코드
MAT.P-1156 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
4월 25일 (수요일) 18:00~21:00
발표형식
포스터
발표분야
재료화학
저자 및
공동저자
조강희, 나경수, 김재헌, 유룡
KAIST 화학과, Korea
Zeolite was hydrothermally synthesized using a surfactant equipped with a micropore-generating functional group. Two-level pore hierarchy of mesopore and micropore was generated in the zeolite structure, whereas the surfactant molecules were assembled into micelles in the mesoscale while each functional group acted as a template for a micropore. An additional macroporosity could occasionally appear to exhibit a totally three-level pore hierarchy. The hierarchically porous morphogenesis has been investigated with X-ray diffraction and electron microscopy, using diatomaceous earth as a silica source. This investigation has unveiled that the two-level pore hierarchy can be developed in case where the crystalline zeolite phase is generated after full migration of the silica source through the solution phase as dissolved. The three-level pore hierarchy is developed in the case of pseudomorphic transformation, in which the solid-state silica source is transformed into a crystalline zeolite before sufficient migration into the solution phase. Furthermore, it has been demonstrated that the hierarchical morphogenesis can be controlled by synthesis conditions and surfactant structures.

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