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研究生:張淵為
論文名稱:氟化鈉輔助合成多孔二氧化鈦之光催化研究
論文名稱(外文):Porous titania synthesized by NaF assistance and its photocatalysis
指導教授:李紫原
口試委員:裘性天徐文光
口試日期:2011-6-10
學位類別:碩士
校院名稱:國立清華大學
系所名稱:材料科學工程學系
學門:工程學門
學類:材料工程學類
論文種類:學術論文
論文出版年:2011
畢業學年度:99
語文別:中文
論文頁數:73
中文關鍵詞:光觸媒二氧化鈦空心球氟化鈉
相關次數:
  • 被引用被引用:2
  • 點閱點閱:366
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  • 下載下載:64
  • 收藏至我的研究室書目清單書目收藏:0
我們利用溶膠凝膠法在不同反應環境下合成二氧化鈦,在四異丙基鈦進行水解反應時,加入不同的溶液使得最後的產物有著不同的形貌,並利用此兩種不同形貌的樣品做各自的後處理,討論其光催化的效果。在第一個實驗中在水解反應時,我們配置了乙醇和氟化鈉水溶液的混合溶液,使得水解時存在著氟化鈉模版為四異丙基鈦前趨物成核及成長的優先位置,並且討論其後處理對光催化的影嚮。而在第二個實驗中,我們配置了乙醇和水的混合溶液,使得水解反應時以最小表面能的形貌,產生球狀的二氧化鈦,之後並利用氟化鈉水溶液進行水熱法反應,產生一空心球結構,並且有擁有 (001) 最佳光催化活性露面,表現出極佳的光催化效果。
We synthesize TiO2 by sol-gel process using TTIP in various solutions to manipulate the morphologies of the products. The photocatalytic performance of these powders were examined and discussed in detail. In the first experiment, NaF(aq) and ethanol were added as hydrolysis took place. The NaF precipitated in solution acted as a template on which precursor preferentially react.. In second experiment, we used water and ethanol to hydrolyze the alkoxide. We obtain sphere-like amorphous TiO2 because it has the least surface energy. Then, we use NaF solution to do hydrothermal reaction. We obtain hollow sphere and possess (001) plane which is the most active plane in anatase TiO2. We also discuss photocatalytic performance of these TiO2.
中文摘要 Ⅰ
英文摘要 Ⅱ
致謝 Ⅲ
目錄 Ⅳ
圖目錄 Ⅷ
表目錄 IV
一、序論 1
1.1 前言 1
1.2 動機 3
二、文獻回顧 4
2.1 二氧化鈦基本性質 4
2.2 二氧化鈦的合成方法 6
2.2.1 溶膠凝膠法 6
2.2.1.1 有機金屬法 7
2.2.1.2 金屬鹽類法 12
2.2.2 水熱法 14
2.3 光催化反應 14
2.3.1 光催化反應原理 14
2.3.2 光催化反應機制 18
2.4 模版材料介紹 18
2.4.1 軟式模版 19
2.4.2 硬式模版 22
2.5 提升光催化效率研究 23
2.5.1 改變二氧化鈦表面結構 23
2.5.2 異質接合結構 24
2.5.2.1 金屬與半導體接合 24
2.5.2.2 半導體與半導體接合 26
2.5.3 擴大二氧化鈦吸收光波長範圍 27
2.5.3.1 非金屬離子摻雜 27
2.5.3.2 過渡金屬離子摻雜 29
三、實驗方法 31
3.1 實驗藥品 31
3.2 實驗儀器 31
3.2.1 掃描式電子顯微鏡 31
3.2.2 粉末X光繞射儀 32
3.2.3 UV/Vis吸收光譜儀 32
3.2.4 比表面積分析 34
3.2.4.1 等溫吸附曲線 35
3.2.5 穿透式電子顯微鏡 39
3.3 光觸媒粉體製備 40
3.3.1 奈米籠子 40
3.3.2 空心球 41
3.4 光催化反應測式 42
四、結果與討論 44
4.1 奈米籠子光觸媒結構與形貌分析 44
4.1.1 形貌與結構鑑定 44
4.1.2 合成機制探討 46
4.1.3 物性分析 47
4.1.4 光催化測詴 50
4.2 空心球光觸媒結構與形貌分析 52
4.2.1 形貌與結構鑑定 52
4.2.2 成長機制探討 56
4.2.3 物性分析 60
4.2.4 光催化測詴 62
五、結論與未來展望 67
5.1 結論 67
5.2 未來展望 67
參考文獻 69
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