摘要
本篇論文主要以 Cr(NO3)3•9H2O / H2SO4 / γ- Al2O3 當作催化劑生長含硼奈米碳管，並探討其生長的情形。有硼原子參雜的奈米碳管，會改變碳管的特性，像是電性、儲氫能力等；可以提高奈米碳管的應用性。本實驗中將利用裂解三異丙基硼酸 ( Triisopropyl Borate ) 以化學氣相沉積法在鉻金屬催化劑上生長含硼奈米碳管。
目前比較被大家所接受的奈米碳管的生長機制為 VLS ( Vapor-Liquid-Solid ) 。這機制認為碳源裂解成碳原子後必須溶解在液化的金屬中，當溶解量達到飽和，碳原子會隨著濃度梯度析出在金屬表面進而生長出奈米碳管。因此生長碳管的催化金屬大多數以溶碳度較高的金屬為主，常見的有鐵、鈷、鎳或是這些金屬的合金。本實驗室提出了一個新的生長模型，認為只要在特定的曲面上有好的活性位置提供碳原子沉積在上面，在適當的溫度下碳就能夠堆積在曲面上生長出奈米碳管。我們已成功的利用低溶碳度的銅以及鉻金屬當作觸媒生長出奈米碳管，可以知道 VLS 並非為生長奈米碳管的唯一機制。

關鍵詞：鉻金屬、銅金屬、含硼奈米碳管、化學氣相沉積法、VLS

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目錄
頁數
論文審定書 I
誌謝 II
摘要 III
目錄 IV
圖目錄 VII
表目錄 XI
第一章 緒論 1
1-1.前言 1
1-2.奈米碳管的結構 2
1-3.奈米碳管的製備方法 3
1-3-1.電弧放電法 ( Arc Discharge ) 4
1-3-2.雷射剝除法 ( Laser Ablation ) 5
1-3-3.化學氣相沉積法 ( Chemical Vapor Deposition ) 6
1-4.化學氣相沉積法 ( CVD ) 法製造奈米碳管的生長機制 7
1-5.含硼奈米碳管的製備與特性 9
1-6.含硼奈米碳管的應用 10
1-6-1.導電材料 10
1-6-2.儲氫材料 11
1-6-3.光電壓元件 13
1-7.本文研究動機 14
第二章 實驗方法 19
2-1.實驗樣品 19
2-1-1.實驗用氣體 19
2-1-2.實驗用藥品 19
2-2.實驗步驟 20
2-3.實驗裝置 20
2-4.分析方法 21
2-4-1.穿透式電子顯微鏡分析 ( TEM，Transmission Electron Microscope ) 21
2-4-2.X光繞射分析 ( XRD，X-ray Powder Diffractomter ) 22
2-4-3.掃描式電子顯微鏡分析 ( SEM，Scanning Electron Microscope ) 23
2-4-4.熱重損失分析 ( TGA，Thermogravimetric Analyzer ) 23
2-4-5.拉曼光譜儀分析 ( Raman Spectrometer ) 24
2-4-6.核磁共振光譜儀分析 ( NMR，Nuclear Magnetic Resonance ) 24
第三章 結果與討論 25
3-1.金屬催化劑的結構分析 25
3-2.以銅金屬催化劑生長含硼奈米碳管 25
3-2-1.熱重損失分析 26
3-2-2.掃描式電子顯微鏡分析 27
3-2-3.穿透式電子顯微鏡分析 29
3-3.以鉻金屬催化劑生長含硼奈米碳管 32
3-3-1.載流氣體的選擇 32
3-3-2.載流氣體中氫氣與氦氣比例的影響 35
3-3-2-1.氦氣比氫氣為 8：2 35
3-3-2-2.氦氣比氫氣為 9：1 36
3-3-2-2-1.固定碳源三異丙基硼酸注入總量為 0.1 ml 36
3-3-2-2-1-1.熱重損失分析 36
3-3-2-2-1-2.掃描式電子顯微鏡分析 38
3-3-2-2-2.固定碳源三異丙基硼酸注入總量為 0.15 ml 39
3-3-2-2-2-1.熱重損失分析 39
3-3-2-2-2-2.掃描式電子顯微鏡分析 40
3-3-2-2-3.固定碳源三異丙基硼酸注入總量為 0.2 ml 42
3-3-2-2-3-1.熱重損失分析 42
3-3-2-2-3-2.掃描式電子顯微鏡分析 43
3-3-2-2-4.高溫對催化劑的影響 46
3-3-2-2-4-1.掃描式電子顯微鏡分析 46
3-3-2-2-4-2.熱重損失分析 47
3-3-2-3.氦氣比氫氣為 9.5：0.5 49
3-3-2-3-1.熱重損失分析 50
3-3-2-3-2.掃描式電子顯微鏡分析 51
3-3-3.拉曼光譜分析 52
3-3-4.核磁共振光譜分析 53
3-3-5.穿透式電子顯微鏡分析 56
第四章 結論 58
第五章 參考文獻 59

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