本研究使用聚乙烯醇透過膠體化學法來製備三氧化鎢溶膠，經由非溶劑沉澱析出後，以高溫煆燒形成三氧化鎢奈米粒子。其粒子的型態、結構、晶粒大小與結晶度，透過UV-visible、TEM和XRD進行檢測與鑑定。
鎢氧化物以奈米級粒子分散於PVA水溶液中，尺寸大小範圍為10~25 nm，將三氧化鎢溶膠於室溫下熟化九天，其型態會由水合物漸漸轉變成結晶的三氧化鎢，而粒子尺寸會逐漸增加。
實驗結果顯示，WO3溶膠擁有較好的光降解速率。聚乙烯醇/三氧化鎢複合粉體用非溶劑析出法將溶膠乾燥成粉體，去量測其光降解效果。從煆燒不同溫度與時間，去找尋一個最適化的煆燒條件。而以450˚C煆燒2小時所得到的三氧化鎢粉體，對染料的光催化降解效果最好。

A tungsten oxide (WO3) sol was synthesized via colloidal chemistry method in presence of poly(vinyl alcohol) (PVA) in this study. WO3 nanoparticles were prepared via non-solvent precipitation and calcination after, the morphology, structure, grain size and degree of crystalline were investigated by UV-visible, TEM and XRD.  WO3 nanoparticles with sizes ranging from 10 to 25 nm were synthesized and dispersed in the PVA aqueous solution. The structure was from WO3 hydrate to crystal WO3 and the size were increased after aging 9 days at room temperature.
The result showed that WO3 synthesized sol has good photogegradation ability.  The PVA/WO3 nanocomposite powder precipitated via non-solvent(acetone)showed the photodegradation ability. To find an optimization of calcination condition, different calcination temperature and time were used. The best calcination condition at 450 ˚C for 2h.

目錄
中文摘要 Ⅰ
英文摘要 Ⅱ
圖目錄 Ⅴ  
表目錄 Ⅷ
第一章	序論 1
1.1前言 1
1.2研究動機 3
第二章 文獻回顧 4
2.1膠體化學法製備三氧化鎢奈米粒子 4
2.2三氧化鎢光催化性質 8
第三章 實驗藥品與儀器 16
3.1實驗藥品 16
3.2實驗步驟 18
3.2.1-1 WO3溶膠製作 18
3.2.1-2 WO3/PVA複合粉體製作 19
3.2.1-3 WO3粉體製作 20
3.2.2靛胭脂藍光降解實驗 21
3.3實驗檢測儀器 23
第四章 結果與討論 26
4.1三氧化鎢溶膠分析 26
4.1.1結構分析 26
4.1.2 粒子形態分析	30
4.1.3三氧化鎢溶膠在光催化活性上的表現	32
4.2 PVA/WO3粉末性質分析 34
4.2.1粉末形態分析	34
4.2.2 TGA分析 35
4.2.3光催化活性上的表現 36
4.3煆燒後粉體的性質分析 37
4.3.1煆燒粉體之ATR分析 37
4.3.2煆燒粉體之XRD分析 38
4.3.3煆燒後粉體形態分析 40
4.3.4 煆燒後粉體在光催化活性上的表現 45
第五章 結論 48
第六章 參考文獻 49
附錄 A 54
附錄 B 56
附錄 C 57
附錄 D 59
附錄 E 61
附錄 F 64
附錄 G 65
附錄 H 68
附錄 I 71

圖目錄
圖2-1	PVA 的TGA /MASS 圖 4
圖2-2	PVA/WO3的 TGA/MASS 圖 4
圖2-3	不同pH值下製備的WO3薄膜TEM圖 5
圖2-4	WO3粉體與奈米平板煆燒400°C 2小時之SEM圖 6
圖2-5	添加不同濃度HCl(aq)製備WO3 XRD圖 7
圖2-6	光催化的催化機制圖	8
圖2-7	三氧化鎢中空微球SEM圖 10
圖2-8	三氧化鎢中空微球光催化活性比較 10
圖2-9	不同樣品對靛胭脂染料(30mg/L)之光降解效率[30]	11
圖2-10	靛胭脂染料以不同樣品在10,000K Xe光下降解效率	12
圖2-11	WO3/H2WO4異質成分光催化的反應機制圖	13
圖2-12	莧菜紅在太陽光模擬器下之降解率 14
圖2-13	實驗設計	15
圖3-1	WO3溶膠製備流程圖	18
圖3-2	PVA/WO3複合粉末製作流程 19
圖3-3	光降解之實驗步驟流程 22
圖3-4	光降解設備圖 22
圖4-1	不同天數熟化的三氧化鎢溶膠之UV-visible光譜圖 27
圖4-2	不同天數熟化的三氧化鎢溶膠照射UV光之UV-visible光譜圖 28
圖4-3	溶膠剛合成及熟化9天後塗膜之XRD圖 29
圖4-4	WO3溶膠TEM 30
圖4-5	光降解效率 33
圖4-6	WO3/PVA複合粉末回溶之TEM 34
圖4-7	聚乙烯醇與三氧化鎢熟化9天混成粉末450°C等溫3小時TGA圖 35
圖4-8	光降解效率比較圖 36
圖4-9	PVA/鎢氧化物在不同溫度下煆燒兩小時的ATR圖 37
圖4-10	B9粉末在不同溫度下煆燒2h之XRD繞射圖 39
圖4-11	B9粉末在450˚C以不同煆燒時間之XRD圖 39
圖4-12	熟化不同天數煆燒450 ˚C 2小時TEM 43
圖4-13	B9粉末以不同溫度煆燒2小時之粉體TEM圖	44
圖4-14	WO3粉體之光催化活性 47
圖B-1	薄膜照射紫外光線前後之UV-vissible穿透圖 56
圖C-1	A3之WO3溶膠之SEM	57
圖C-2	A5之WO3溶膠之SEM	57
圖C-3	A7之WO3溶膠之SEM	58
圖C-4	A9之WO3溶膠之SEM	58
圖D-1	不同樣品對靛胭脂染料之光降解效率 59
圖D-2	靛胭脂染料之光降解效率 60
圖E-1	聚乙烯醇之TGA圖 61
圖E-2	PVA/WO3混成粉末之TGA圖 61
圖E-3	PVA FTIR圖 61
圖E-4	PVA裂解可能的機制	63
圖F-1	IC染料之光降解效率	64
圖G-1	WO3之XRD標準圖譜(1) 67
圖G-2	WO3之XRD標準圖譜(2) 67
圖H-1	不同煆燒粉體樣品靛胭脂染料之光降解效率	69
圖H-2	不同燈管之光譜圖	70
圖H-3	B9粉末(a)450˚C, 2.5h, (b)450, 2h在16支6,500K下之光降解實驗	70
圖H-4	B9粉末(a)450˚C, 2.5h, (b)450, 2h在16支2,700K下之光降解實驗	70
圖I-1   B9粉末煆燒450°C ,2h之XPS 71


表目錄
表A-1	B9粉體之元素分析 54
表A-2	B9煆燒不同溫度兩小時之物理性質 65
表A-3	B9粉體煆燒450˚C不同時間之物理性質 66

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