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  • 09월 03일 23시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제122회 대한화학회 학술발표회, 총회 및 기기전시회 안내 LVHR-SEM Images for Porous Carbons Replicated from Novel Geopolymer Template

2018년 9월 1일 13시 22분 48초
MAT.O-17 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
목 10시 : 52분
Material Chemisty - Oral Presentation of Young Material Chemists
저자 및
Yirong Pei, Shunsuke Asahina1, Goeun Choi, Jin-ho Choy*
Department of Chemistry and Nanoscience, Ewha Womans University, Korea
1SM Business unit, JEOL Ltd. , Japan
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승인 1건
An attempt is made to demonstrate nanoporosity and nanomorphology of mesoporous carbons replicated from our porous geopolymer template with the low voltage high resolution scanning electron microscopy (LVHR-SEM). In this study, the SEM observation could be made not only for the porous geopolymer but also for the porous carbon with clear images on intra-wall pores, uniform cylindrical pores and packed nanowires. In addition, the CO2 uptake capacity for this prepared porous carbon is carefully analyzed. Different from porous carbons conventionally prepared with porous silica template, which is in general synthesized from tetraethoxysilane (TEOS) as a silicon precursor, the present novel geopolymer template route to porous carbons is suggested not only to induce higher specific surface areas and larger pore volumes but also to provide a cost effective way of synthetic process compared to the conventional TEOS one. The porous geopolymer prepared from metakaolin (PG) is observed to be structured with hexagonal channels revealing unique and well-ordered mesopores of 7.20 nm as well as micropores, those which are connected with mesopores each other. The porous carbon rods (CPG) are effectively replicated from the PG template to form regularly packed and ordered structure with such high BET surface area (~ 1500 m2/g) and pore volume (~ 1.5 cm3/g) as demonstrated by such a high CO2 uptake capacity of 26.3 mmol/g at 273k and 30 atm due to the presence of mesopores and micropores appropriately.