DC Field | Value | Language |
---|---|---|
dc.contributor.advisor | Kim, Il Doo | - |
dc.contributor.advisor | 김일두 | - |
dc.contributor.author | Koo, Won-Tae | - |
dc.date.accessioned | 2019-09-03T02:45:20Z | - |
dc.date.available | 2019-09-03T02:45:20Z | - |
dc.date.issued | 2016 | - |
dc.identifier.uri | http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=849892&flag=dissertation | en_US |
dc.identifier.uri | http://hdl.handle.net/10203/266435 | - |
dc.description | 학위논문(석사) - 한국과학기술원 : 신소재공학과, 2016.2,[vi, 39 p. :] | - |
dc.description.abstract | We report on novel sensitization of metal-metal oxide complex catalysts onto semiconductor metal ox-ide (SMO) nanofibers (NFs) achieved by metal-organic framework (MOF) templating and electrospinning routes. Pd nanoparticles (2~3 nm) encapsulated in the cavity of zeolite imidazole framework (ZIF-8, ~ 100 nm) were mixed with electrospinning solution and embedded in electrospun W precursor/polyvinylpyrrolidone composite NFs. After calcination process, Pd-loaded ZnO nanocubes (Pd-ZnO) derived from Pd embedded Zn based MOF were effectively sensitized on interior and exterior of $WO_3$ NFs, resulting in the build-up of multi-heterojunctions of Pd-ZnO and $ZnO-WO_3$. Surprisingly, the Pd-ZnO loaded $WO_3$ NFs exhibited a superi-or toluene sensitivity ($R_{air}/R_{gas} = 4.37 to 100 ppb$) and selectivity against other interfering analytes. Moreover, the gas responding speed was dramatically enhanced (~20 sec) compared to pristine $WO_3$ NFs (~44 sec). These results demonstrate that MOF-driven metal-metal oxide complex catalysts can be functionalized within metal-oxide nanofiber scaffold during electrospinning, thereby creating multi-heterojunctions for catalytic sensitization. This feature can pave a new way of complex catalyst synthesis for potential application in high performance chemical gas sensors. | - |
dc.language | eng | - |
dc.publisher | 한국과학기술원 | - |
dc.subject | Metal-Organic Framework▼acatalyst▼ananofiber▼aelectrospinning▼agas sensor | - |
dc.subject | 금속유기구조체▼a촉매▼a나노섬유▼a전기방사▼a가스 센서 | - |
dc.title | Metal-organic framework driven metal-metal oxide complex catalyst sensitized on nanofiber scaffold: superior chemical gas sensors | - |
dc.title.alternative | 금속유기구조체 기반 금속-금속산화물 복합 촉매가 결착된 나노섬유에 관한 연구 | - |
dc.type | Thesis(Master) | - |
dc.identifier.CNRN | 325007 | - |
dc.description.department | 한국과학기술원 :신소재공학과, | - |
dc.contributor.alternativeauthor | 구원태 | - |
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