DC Field | Value | Language |
---|---|---|
dc.contributor.advisor | Cho, Sung-Oh | - |
dc.contributor.advisor | 조성오 | - |
dc.contributor.author | Ali, Ghafar | - |
dc.contributor.author | Ali, Ghafar | - |
dc.date.accessioned | 2015-04-23T07:09:35Z | - |
dc.date.available | 2015-04-23T07:09:35Z | - |
dc.date.issued | 2013 | - |
dc.identifier.uri | http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=565583&flag=dissertation | - |
dc.identifier.uri | http://hdl.handle.net/10203/197260 | - |
dc.description | 학위논문(박사) - 한국과학기술원 : 원자력및양자공학과, 2013.8, [ xiii, 111 p. ] | - |
dc.description.abstract | Synthesis of One-Dimensional (1-D) nanostructures transition metal-oxide materials gained a lot of attention of the scientific community in the last few decades due to their unique properties and potential application in various fields. Particularly $TiO_2$ (titanium-di-oxide or titania) nanostructures (nanoparticles, nanotubes and nanoporous arrays) have been extensively investigated because of their semiconducting nature and versatile applications. Among all the existence synthesis routes of $TiO_2$ nanostructure, electrochemical approach (anodization) is very simple and straight forward process which offers many advantages such as low cost, control over morphology, highly-ordered, vertically oriented, and self-organized oxide nanostructures growth with high-aspect ratio. Anodization of Ti sheet in fluoride containing organic viscous electrolytes under optimized conditions always produced self-organized, highly-ordered and vertically oriented high aspect ratio $TiO_2$ nanotubes with extremely smooth walls morphology. Anodization generally produced nanotubular and nanoporous structure on various valuable metals and alloys. In this study, we report the mass production synthesis of $TiO_2$ nanoparticles for the first time using anodization process. The size of $TiO_2$ nanoparticles was tailored by changing the concentration of the electrolyte in the anodizing process. $TiO_2$ nanoparticles showed higher photocatalytic activity compared to Degussa (P25) under the same conditions. Metal-oxide nanoparticles of various materials such as In, Sn, Ni, Fe, Zn and Cu can also be mass-produced using the same technique. An innovative technique of N_2 gas blowing in conjunction with methanol wetting onto fabricated $TiO_2$ nanotubes after anodization lead to the readily separation of nanotubes from underlying Ti sheet, generating large-scale and robust free-standing TiO2 nanotubes arrays membranes. The approach also provides very clean and shiny, homogeneous and honeycomb-... | eng |
dc.language | eng | - |
dc.publisher | 한국과학기술원 | - |
dc.subject | Electrochemistry | - |
dc.subject | 자외선 | - |
dc.subject | 광촉매작용 | - |
dc.subject | 나노물질 | - |
dc.subject | 막 | - |
dc.subject | 나노기공 | - |
dc.subject | Anodization | - |
dc.subject | Titania | - |
dc.subject | Nanotubes | - |
dc.subject | Nanoaprticles | - |
dc.subject | Nanopores | - |
dc.subject | Membranes | - |
dc.subject | Nanomaterials | - |
dc.subject | Photocatalysis | - |
dc.subject | UV | - |
dc.subject | 전기화학 | - |
dc.subject | 양극 산화 | - |
dc.subject | 티타니아 | - |
dc.subject | 나노튜브 | - |
dc.subject | 나노입자 | - |
dc.title | Synthesis of TiO2 nanostructures by an electrochemical approach and their applications | - |
dc.title.alternative | 전기화학적 양극산화법을 이용한 TiO2 나노구조 합성 및 응용 | - |
dc.type | Thesis(Ph.D) | - |
dc.identifier.CNRN | 565583/325007 | - |
dc.description.department | 한국과학기술원 : 원자력및양자공학과, | - |
dc.identifier.uid | 020095385 | - |
dc.contributor.localauthor | Cho, Sung-Oh | - |
dc.contributor.localauthor | 조성오 | - |
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