臺灣博碩士論文加值系統

　　二氧化鈦光觸媒已發展了25年，它具有光催化的特性，是一非常出色的環境清淨的光觸媒。
　　超臨界流體技術，號稱綠色化學技術，運轉過程中不會對環境造成傷害，因此本文將以超臨界流體技術，來製備二氧化鈦光觸媒，並使之達到奈米級的程度。
　　當二氧化鈦粒子，粒徑小於10 nm時，因為量子效應的影響，會使其光催化效果提升。本文所敘述的超臨界流體技術，已成功達到次此一目標。
　　最後則摹擬空氣污染降解，以紫外光當光源，甲苯當污染源，以氣相層析儀當偵測器，成功的於短時間內將甲苯降解完畢。

　The titania photocatalysts have been research quartern century. It has characteristic of photocatalysis which is excellent performance of environmetal cleanup.
　The supercritical fluids technology is referred to as a greenchemical thechology. This process operate has not to damage the environmetal. Therefore this procedure allows the preparation of the titania photocatalysis by the supercritical fluids technology and reach to nanometer extent.
　Quantum size effects ( QSE ) occur for titania particles on the order of than 10 nm in size.
　Finally we mimic degradation of air pollutants. It allows the oxidation of airborne toluene into carbon dioxide and water at room temperature in the presence of a titania and UV light source and GC detector on short time.

中文摘要 Ⅰ
英文摘要 Ⅱ
目錄 Ⅵ
圖目錄 Ⅵ表目錄 Ⅸ
第一章 緒論
　　1.1研究動機 3
　　1.2 研究目的 4
第二章 文獻回顧
　　2.1 超臨界流體之性質 5
　　　　2.1.1 超臨界流體簡介 5
　　2.2 超臨界流體製備奈米粒子之方法 9
　　　　2.2.1 超臨界溶液快速膨脹法 ( RESS ) 9
　　　　2.2.2 氣體抗溶劑 / 超臨界流體抗溶劑法（GAS）/( SAS ) 13
　　　　2.2.3 氣溶膠溶劑萃取系統 （ASES） 17
　　2.3 奈米粒子之性質 19
　　　　2.3.1 奈米粒子之簡介 20
　　　　2.3.2 量子限量化效應 21
　　　　2.3.3 表面效應 22
　　　　2.3.4 奈米粒子的形狀 23
　　　　2.3.5 奈米粒子製備方法 27
　　　　　　2.3.5.1 物理方法 27
　　　　　　2.3.5.2 化學方法 29
　　　　　　2.3.5.3 侷限空間的化學還原法 36
　　　　　　2.3.5.4 光觸媒沉澱法 40
　　2.4 奈米二氧化鈦 41
　　　　2.4.1 二氧化鈦光觸媒的性質 45
　　　　2.4.2 奈米二氧化鈦製備 49
　　　　2.4.3 二氧化鈦的限量量子化效應 52
　　　　2.4.4 光反應器的簡介 54
第三章 實驗
　　3.1 藥品 58
　　　　3.1.1 實驗儀器 59
　　3.2 實驗設計 74
　　3.3奈米級二氧化鈦之製備及其光降解實驗 77
第四章 結果與討論
　　4.1使用RESS 製程的結果 80
　　4.2 使用超臨界流體逆微胞法壓力與粒徑 82
　　4.3 使用SAS製程的探討 83
　　4.4 使用超臨界流體乾燥法的探討 85
　　4.5 鍛燒處理的探討 86
　　4.6 反應溫度與粒徑關係之探討 87
　　4.7 反應壓力與粒徑關係之探討 88
　　4.8 反應時間與粒徑關係之探討 89
　　4.9 超臨界流體乾燥程序中溶劑的影響 90
　　4.10 鍛燒溫度的影響 92
　　4.11 光降解結果的探討 93
　　4.12光降解結果探討 97
第五章 結論 99
第六章 未來展望 100
參考文獻 101
附錄 111

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