연구분야 및 연구실
연구기자재
년도별 수행과제
최신연구결과
국제교류
 
 
 최신연구결과
> 연구정보 > 최신연구결과   
 
제목   [14.06월] 홍석봉 교수 연구실 Intraframework Migration of Tetrahedral Atoms in a Zeolite   이름  관리자
날짜  2014-06-20 09:50:59 조회  1691 추천  0
첨부  

Title: Intraframework Migration of Tetrahedral Atoms in a Zeolite

Authors: Jiho Shin, Nak Ho Ahn, Miguel A. Camblor, Sung June Cho, Suk Bong Hong

Journal: Angewandte Chemie

Abstract: The transformation from a disordered into an ordered version of the zeolite natrolite occurs on prolonged heating of this material in the crystallizing medium, but not if the mother is replaced by water or an alkaline solution. This process occurs for both aluminosilicate and gallosilicate analogues of natrolite. In cross experiments, the disordered Al-containing (or Ga-containing) analogue is heated while in contact with the mother liquor of the opposite analogue, that is, the Ga-containing (or Al-containing) liquor. Therefore, strong evidence for the mechanism of the ordering process was obtained, which was thus proposed to proceed by intraframework migration of tetrahedral atoms without diffusion along the pores. Migration is first triggered, then fuelled by surface rearrangement through reactions with the mother liquor, and stops when an almost fully ordered state is attained. Classical dissolution–recrystallization and Ostwald ripening processes do not appear to be relevant for this phase transformation.


출력하기 - 메일발송      
     
   
 
이름
 
제목 이름 조회 추천 날짜
    [14.08월] 이기택 교수 연구실 Title: Decadal (1994-2008) change in the carbon isotope ratio in the eastern South Pacific Ocean 관리자 1904 0 2014-08-04
    [14.06월] 홍석봉 교수 연구실 Intraframework Migration of Tetrahedral Atoms in a Zeolite 관리자 1691 0 2014-06-20
    [14.06월] 홍석봉 교수 연구실 An Aluminophosphate Molecular Sieve with 36 Crystallographically Distinct Tetrahedral Sites 관리자 1798 0 2014-06-05