本研究於大面積玻璃基板上製備銅氧化物、銀、金修飾之氧化鋅奈米柱，進行光觸媒分解甲醛氣體之實驗。透過低溫水熱法製程，氧化鋅奈米柱可順利成長於100 cm2之大面積玻璃基板上，再透過光沉積法及電子束物理氣相沉積法以製備雙元奈米複合材料。
　　透過掃描式電子顯微鏡觀察表面形貌，可觀察到氧化鋅奈米柱為均勻的六角柱狀。以X射線繞射光譜進行分析，可確認氧化鋅奈米柱為纖鋅礦結構。光致發光光譜則顯示經修飾後之氧化鋅奈米柱，於紫外光放光波段強度降低。其中以Au/ZnO下降的程度最大，代表有最佳之電子電洞分離成效。透過紫外光—可見光光譜分析，可得知修飾後材料對於可見光之吸收有所提升。
　　光觸媒分解甲醛氣體實驗中，以16 L鋁合金腔體作為固定式反應器，通入甲醛氣體汙染源，並使用4 W UVA螢光燈管光源，照射基板進行分解實驗。不同濃度測試中，使用1 ppm ~ 4 ppm初始濃度進行實驗。當照光120分鐘後，Au/ZnO均展現最佳分解成效，最高可以移除 80% 之甲醛。經線性擬合後，ZnO、CuxO/ZnO、Ag/ZnO與Au/ZnO的準一階反應常數平均值依序為0.0037 min-1、0.0041 min-1、0.0079 min-1、0.0147 min-1。分解效率最高的Au/ZnO之反應常數為ZnO的3.97倍。延長反應時間測試中，於1 ppm初始濃度下照光 360 分鐘後，Au/ZnO可移除90% 之甲醛，使濃度降低至法定標準濃度值附近。改以4 W 日光燈管光源測試中，於1 ppm初始濃度下照光120 分鐘後，Au/ZnO可移除45% 之甲醛。這些結果顯示Au/ZnO很適合於常溫下以光觸媒分解甲醛。

This study aims to investigate the photocatalytic decomposition of gaseous formaldehyde using copper oxide, silver, or gold modified zinc oxide nanorods on large glass substrates. Zinc oxide nanorods were successfully grown on 100 cm2 glass substrates by using the low temperature hydrothermal method. Binary nanocomposites were then prepared by the photodeposition method and the electron beam physical vapor deposition method.
The morphology of the samples was examined by the scanning electron microscope, showing that hexagonal-prism-shaped zinc oxide nanorods were uniformly grown. The wurtzite crystal structure of zinc oxide nanorods was confirmed by the X-ray diffraction pattern. From the photoluminescence spectra, the intensity of the ultraviolet emission reduced after the modification. The photoluminescence intensity of Au/ZnO sample exhibited the lowest value, indicating that this sample had the best ability to inhibit the recombination of the electron-hole pairs. From the ultraviolet-visible spectra, modified samples had enhanced absorption properties in the visible light region.
Among all the photocatalytic decomposition of gaseous formaldehyde experiments, a 16 L aluminum alloy fixed bed reactor was used. After introducing gaseous formaldehyde into the chamber, a 4 W UVA fluorescent light tube was turned on for the decomposition tests. The effect of different initial concentrations was tested from 1 to 4 ppm. Au/ZnO showed the best removal efficiency of formaldehyde, which could remove 80% formaldehyde after 120 min. The average pseudo first order reaction constants of ZnO, CuxO/ZnO, Ag/ZnO, and Au/ZnO were 0.0037 min-1, 0.0041 min-1, 0.0079 min-1, and 0.0147 min-1, respectively. Au/ZnO had the highest value of the reaction constant, which was 3.97 times higher than the value of ZnO. The effect of prolonged tests was tested under 1 ppm for 360 min. Au/ZnO removed 90% formaldehyde, which could approximately meet the mandatory standard. The effect of 4 W visible light source was tested by using Au/ZnO under 1 ppm for 120 min. Au/ZnO still removed 45 percent formaldehyde under this condition. These tests showed that Au/ZnO had good potential for the photocatalytic decomposition of gaseous formaldehyde at room temperature.

摘要 I
Abstract II
誌謝 IV
總目錄 V
圖目錄 VII
表目錄 X
第一章、緒論 2
1.1 前言 2
1.2 揮發性有機汙染物 3
1.3 空氣淨化方法 4
1.4 研究動機 9
第二章 文獻回顧 11
2.1 氧化鋅 11
2.1.1 氧化鋅的晶體結構 11
2.1.2 氧化鋅的合成方法 12
2.1.3 氧化鋅的光學性質 13
2.2 光觸媒催化反應 15
2.2.1 影響光觸媒效率因子 16
2.2.2 光沉積法改質 18
2.2.3 光觸媒分解氣相有機汙染物 20
2.3 表面電漿子 23
第三章 研究方法 26
3.1 實驗設計 26
3.2 材料製備流程 27
3.2.1 成長氧化鋅奈米柱 27
3.2.2 光沉積法製備奈米複合材料 28
3.2.3 電子束蒸鍍法製備奈米複合材料 29
3.3 分析儀器 30
3.3.1 掃描式電子顯微鏡 30
3.3.2 能量色散X射線光譜儀 30
3.3.3 螢光光譜儀 30
3.3.4 紫外光－可見光光譜儀 31
3.3.5 X射線繞射儀 31
3.4 光觸媒分解氣相甲醛實驗 32
3.4.1 分解系統架構 32
3.4.2 氣體濃度計算 34
3.4.3 氣體分解實驗 35
第四章 結果與討論 37
4.1 材料分析 37
4.1.1 表面形貌 37
4.1.2 結構與組成 41
4.1.3 光學性質分析 44
4.2 光觸媒分解甲醛結果 47
4.2.1 空白組測試 47
4.2.2 不同初始濃度測試 48
4.2.3 長時間測試 53
4.2.4 可見光源測試 55
第五章 結論 59
參考文獻 61

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