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論文名稱 Title |
中孔洞奈米金屬的合成 Synthesis of ordered mesoporous metal nanostructures |
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系所名稱 Department |
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畢業學年期 Year, semester |
語文別 Language |
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學位類別 Degree |
頁數 Number of pages |
92 |
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研究生 Author |
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指導教授 Advisor |
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召集委員 Convenor |
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口試委員 Advisory Committee |
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口試日期 Date of Exam |
2012-06-25 |
繳交日期 Date of Submission |
2012-07-24 |
關鍵字 Keywords |
金屬反結構、初濕含浸法、奈米金屬線/二氧化矽、3D立體體心立方(BCC)奈米金屬網路/二氧化矽 metal replica, incipient wetness impregnation, metal nanowires/silica, 3D body-centered cubic (BCC) metal network/silica |
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統計 Statistics |
本論文已被瀏覽 5646 次,被下載 1363 次 The thesis/dissertation has been browsed 5646 times, has been downloaded 1363 times. |
中文摘要 |
本研究合成共嵌段聚合物Poly(ethylene glycol)-b-Poly(ε-caprolactone) (PEO-b-PCL)當作軟模板,並使用揮發導致自組裝形成中孔洞二氧化矽及中孔洞酚醛,並將酚醛碳化後轉換成中孔洞碳材,然後透過初濕含浸法將金屬前驅物填入孔道內並在高溫氫氣還原後得到填入孔道內之3D立體體心立方(BCC)金屬網路/二氧化矽和奈米金屬線/二氧化矽,金屬/酚醛複合材料和金屬/碳材複合材料,再經過氫氟酸清洗掉二氧化矽部分後可得到金屬反結構。透過穿透式電子顯微鏡(TEM)和小角度X光散射(SAXS)鑑定後可看出在合成後仍保有原來規則形貌且結構完好,加上選區繞射圖譜(SAED)及X光繞射分析(XRD)鑑定鈀、銀於孔道填入情況並且還原成零價金屬,而孔洞分布和比表面積可由氮氣吸脫附儀看出孔洞前後變化,金屬填入情況。 我們期望所合成的奈米金屬材料在未來應用上有著極優越的發展如催化反應、氣體偵測、奈米光電裝置及醫藥檢測。 |
Abstract |
In this study, we synthesized amphiphilic block copolymer Poly(ethylene glycol)-b-Poly(ε-caprolactone) (PEO-b-PCL), and the mesoporous silica and phenolic were synthesized by using EISA (evaporation induced self-assembly) strategy. The mesoporous carbon also obtained after carbonization. After incorporating the precursors into the mesoporous channels through incipient wetness impregnation and further hydrogen reduction, 3D body-centered cubic (BCC) metal network/silica, metal nanowires/silica, metal/phenolic, and metal/carbon nanocomposites could be obtained. Moreover, metal replica was obtained through HF etching. Transmission electron microscope (TEM) and the small angle X-ray scattering (SAXS) patterns indicate that the parent ordered mesoporous structure was well-maintained during the synthesis process. The X-ray diffraction (XRD) and selected-area electron diffraction (SAED) demonstrate that Pd and Ag were reduced within the channels of mesoporous materials. The pore size distribution and BET surface area of mesoporous materials and metal/mesoporous materials composite were recorded by N2 isotherm adsorption-desorption experiment. In the future, we expect that the mesoporous metal and mesoporous nanocomposite with specific morphologies behave excellent performance in various applications, such as catalysis, gas sensors, nano electronic/optical devices and medical diagnosis. |
目次 Table of Contents |
摘要 i Abstract ii 目錄 iii 表目錄 v 圖目錄 vi 第一章 前言 1 1-1中孔洞氧化矽與奈米金屬簡介 1 1-2研究動機 2 第二章 理論與文獻回顧 4 2-1 嵌段共聚物(Block copolymer) 4 2-2 氫鍵作用力(hydrogen bond interaction) 5 2-3揮發誘導自組裝(Evaporation induced self-assembly, EISA) 5 2-4 Novolac type酚醛樹酯及交聯劑六甲烯基四胺 8 2-5 中孔洞材料簡介 9 2-6 中孔洞奈米金屬介紹及應用 10 第三章 實驗方法及步驟 16 3-1金屬/中孔洞二氧化矽實驗內容 16 3-2使用藥品 17 3-3樣品製備 18 3-3-1合成Poly(ethylene glycol)-block-Poly(ε-caprolactone) 18 3-3-2合成中孔洞二氧化矽 18 3-3-3合成中孔洞酚醛樹脂並經由碳化形成中孔洞碳材 19 3-3-4金屬前驅物填入中孔洞材料孔道中 20 3-3-5中孔洞金屬通氫氣還原過程 20 3-3-6金屬/中孔洞二氧化矽經由氫氟酸洗掉形成金屬反結構 21 3-4儀器使用 21 3-4-1氫核磁共振分析儀(Nuclear Magnetic Resonance, NMR) 21 3-4-2傅立葉紅外線光譜儀(Fourier Transform Infrared Spectrometer, FT-IR) 22 3-4-3 比表面積分析儀(Specific Surface Area & Pore Size Distribution Analyzer, BET) 23 3-4-4小角度X光散射儀(Small Angle X-ray Scattering, SAXS) 23 3-4-5穿透式電子顯微鏡(Transmission Electron Microscope,TEM) 24 3-4-6高解析度X光繞射儀(high resolution X-ray diffractometer) 24 第四章 結果與討論 26 4-1嵌段共聚物PEO-b-PCL的鑑定 26 4-2中孔洞二氧化矽結構轉換 27 4-3中孔洞二氧化矽長柱結構 32 4-4中孔洞碳材長柱結構 34 4-5中孔洞二氧化矽BCC填金屬鈀和反結構金屬鈀 36 4-6中孔洞二氧化矽BCC填金屬銀 44 4-7中孔洞二氧化矽長柱填金屬銀 49 4-8中孔洞二氧化矽長柱填金屬鈀 53 4-9中孔洞碳材長柱填金屬銀 58 4-10中孔洞碳材長柱填金屬鈀 62 第五章 結論 66 第六章 參考文獻 67 附錄 70 |
參考文獻 References |
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