Leaf-inspired highly efficient and stable photocatalyst for $CO_2$ conversion = 나뭇잎 구조 모사를 통한 고 효율 고 안정성 이산화탄소 환원 광촉매의 개발 및 특성

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dc.contributor.advisorJung, Hee-Tae-
dc.contributor.advisor정희태-
dc.contributor.authorJung, Hyunju-
dc.contributor.author정현주-
dc.date.accessioned2017-03-29T02:34:39Z-
dc.date.available2017-03-29T02:34:39Z-
dc.date.issued2016-
dc.identifier.urihttp://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=649490&flag=dissertationen_US
dc.identifier.urihttp://hdl.handle.net/10203/221532-
dc.description학위논문(석사) - 한국과학기술원 : 생명화학공학과, 2016.2 ,[iv, 35 p. :]-
dc.description.abstractA leaf adopts to natural photosynthesis based on the unique structural and chemical strategies. Structurally, sponge cells in the leaf trigger light scattering and offer efficient gas diffusion and adsorp-tion pathway. Chemically, leaf’s unique catalytic system, so called a Z-scheme, could generate photoex-cited electrons at one chlorophyll (P680) and transport them via electron transfer channel (Cytochrome $b_6f$ complex) to the other chlorophyll (P700) in order to increase product yield and selectivity. Here, we created a leaf-inspired highly stable metal-free photocatalyst, consisting of few layered molybdenum disulfide ($MoS_2$) and mesoporous titanium dioxide ($TiO_2$) on graphene aerogel. Similar to the sponge cells, graphene aerogel structures and mesoporous $TiO_2$ nanoparticles imitate hierarchical architecture of a leaf to increase mass transportation and light absorption. Also, the artificial Z-scheme is construct-ed by precisely controlled energy pathway from $TiO_2$ via graphene to few layered $MoS_2$, which improve charge transfer, redox power of carriers, and broad light absorption range. The resulting artificial leaf photocatalyst shows robust stability and outstanding photocatalytic activity ($92.33 \mu mol CO /g \cdot h$) ca. 15 times higher than bare $TiO_2$, which highly efficient performances than those of metal-based catalysts.-
dc.languageeng-
dc.publisher한국과학기술원-
dc.subjectPhotocatalyst-
dc.subjectCO2 conversion-
dc.subjectleaf-mimic-
dc.subjectZ-scheme-
dc.subject광촉매-
dc.subject이산화탄소 환원-
dc.subject나뭇잎 모사-
dc.titleLeaf-inspired highly efficient and stable photocatalyst for $CO_2$ conversion = 나뭇잎 구조 모사를 통한 고 효율 고 안정성 이산화탄소 환원 광촉매의 개발 및 특성-
dc.typeThesis(Master)-
dc.identifier.CNRN325007-
dc.description.department한국과학기술원 :생명화학공학과,-
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CBE-Theses_Master(석사논문)
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