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제122회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Decomposition of CH4 gas using TiO2 Nanotubes/Optical Fibers for Trace Contaminant Control System of Spacecraft

2018년 8월 30일 17시 52분 37초
MAT.P-480 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
10월 18일 (목요일) 11:00~12:30
Material Chemistry
저자 및
Dongyun Kim, Hyun Kim1, Bee Lyong Yang2,*
Kumoh National Institute of Technology, Korea
1School of Materials Science and Engineering, Kumoh National Institute of Technology, Korea
2Department of Advanced Materials Engineering, Kumoh National Institute of Technology, Korea
Decomposition of volatile organic compounds (VOCs) by means of photocatalysts has been studied for designing of spacecraft and spacesuit. Especially for long period mission such as planet exploration, because they cause diseases such as central nervous disorder, irritation of mucosa and arrhythmia. As present VOCs control system that are composed by a charcoal bed for adsorption, a sorbent bed(2kg of LiOH/day-person, LiOH affects irritation of eyes) and a catalytic oxidizer(operated at 400°C) is heavy, high power consumption and complex, thus, newly development of compact, efficient and highly durable VOCs control system is required now. In this study, we suggested that TiO2 nanotubes enable to reduce weight of present VOCs control system and hazardous LiOH replacement. What we suggest that TiO2 nanotubes mean having wide band gap is to be enable effective charge separation and catalysis. TiO2 is not available at visible-light irradiation due to its wide band gap of 3.2eV. Thus, QDs as visible light absorber deposited TiO2 nanotubes were prepared by chemical bath deposition in convection oven. TiO2 nanotubes were characterized for decomposition of VOCs that confined on surface of tube walls to protect astronauts against VOCs. VOCs for decomposition test were considered based on spacecraft maximum allowable concentrations table from NASA. Their efficiency of VOCs decomposition in both TiO2 nanotube-coated optical fibers will be investigated and evaluated in the trace contaminant system of spacecrafts.