DC Field | Value | Language |
---|---|---|
dc.contributor.advisor | Kim, Il-Doo | - |
dc.contributor.advisor | 김일두 | - |
dc.contributor.author | Jang, Bong-Hoon | - |
dc.contributor.author | 장봉훈 | - |
dc.date.accessioned | 2015-04-23T07:11:11Z | - |
dc.date.available | 2015-04-23T07:11:11Z | - |
dc.date.issued | 2013 | - |
dc.identifier.uri | http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=566487&flag=dissertation | - |
dc.identifier.uri | http://hdl.handle.net/10203/197368 | - |
dc.description | 학위논문(석사) - 한국과학기술원 : 신소재공학과, 2013.8, [ x, 84 p. ] | - |
dc.description.abstract | We report on facile synthesis of SnO2 nanofibers (NFs) functionalized by Pt nanoparticles (NPs) with various loading contents (0.05-0.4 wt%) and their gas response towards H2, NO2, NH3, CO, and SO2 gases as a function of the operation temperature (100-450 °C) and gas concentration (0.125-2.5 ppm). Mesoporous SnO2 NFs with large surface-to-volume ratio, which facilitates sensitive gas response, were synthesized by electrospinning followed by subsequent calcination at 500 °C for 2 h. Colloidal Pt NPs synthesized by simple polyol method were immobilized on SnO2 NFs as a catalytic sensitizer to H2 oxidation. The gas sensing properties and response kinetics were significantly affected by the Pt NPs and the operation temperature. It was found that 0.1 wt% Pt-loaded SnO2 sensor showed the highest H2 response (Igas/Iair = 16.6 at 2.5 ppm) at 300 °C. A remarkably high NO2 response (Iair/Igas = 57.0 at 2.5 ppm) was achieved in the case of pristine SnO2 sensor at 150 °C. This work demonstrates that sensitive and selective detection of H2 and NO2 gases with negligible cross-response to interfering gases such as NH3, CO, and SO2 can be obtained by decoration with Pt NPs on metal oxide NFs in conjunction with manipulation of the operation temperature. | eng |
dc.language | eng | - |
dc.publisher | 한국과학기술원 | - |
dc.subject | electrospinning | - |
dc.subject | 가스센서 | - |
dc.subject | 이산화질소 | - |
dc.subject | 수소 | - |
dc.subject | 백금촉매 | - |
dc.subject | 주석산화물 | - |
dc.subject | nanofibers | - |
dc.subject | tin oxide | - |
dc.subject | Pt catalyst | - |
dc.subject | hydrogen | - |
dc.subject | nigrogen dioxide | - |
dc.subject | gas sensor | - |
dc.subject | 전기방사 | - |
dc.subject | 나노섬유 | - |
dc.title | Selectivity enhancement of SnO2 nanofiber gas sensors by functionalization with Pt nanocatalysts and manipulation of the operation temperature | - |
dc.title.alternative | 백금 나노촉매 기능화 및 동작온도 제어를 통한 주석산화물 나노섬유 가스센서의 선택성 향상에 관한 연구 | - |
dc.type | Thesis(Master) | - |
dc.identifier.CNRN | 566487/325007 | - |
dc.description.department | 한국과학기술원 : 신소재공학과, | - |
dc.identifier.uid | 020114473 | - |
dc.contributor.localauthor | Kim, Il-Doo | - |
dc.contributor.localauthor | 김일두 | - |
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