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  • 02월 22일 16시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

Rapid Synthesis of High-Quality ETS-10 Crystals [우수포스터상],[IUPAC포스터상]

등록일
2008년 2월 12일 14시 59분 19초
접수번호
0992
발표코드
28P126포 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
금 <발표Ⅳ>
발표형식
포스터
발표분야
무기화학
저자 및
공동저자
이영주, 정낙천, 윤경병
서강대학교 화학과, Afghanistan
Heating a gel consisting of briefly hydrolyzed tetraethyl orthosilicate (TEOS), 2-5-nm sized anatase, H2SO4, NaOH, KF, and H2O in the mole ratio of 5.5:1:2.2:8.4:1.43:350 at 200 °C for 7 h leads to production of ETS-10 crystals in fairly uniform size (~500-nm) and shape having well-developed smooth facets in the truncated tetragonal bipyramidal structure. Characterization of the crystals revealed that the titanate (TiO32- ) quantum wires are well preserved within the produced crystals. The required reaction period under our reaction condition (7 h) is much shorter than under the previously reported conditions which use Degussa P25 (a mixture of ~25 nm sized anatase and rutile) as the Ti source (> 42 h at 200 °C). The marked increase in crystallization rate and uniformity of size and shape is attributed to the use of very small anatase nanoparticles and briefly hydrolyzed tetraethyl orthosilicate (TEOS) as the Ti and Si sources, respectively. This report also demonstrates for the first time that TEOS can be used as the Si source.

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