臺灣博碩士論文加值系統

本研究是針對尺寸為次微米級（M-TiO2）、奈米級（N-TiO2、STO1、P-25）及奈米管（NT-TiO2）之二氧化鈦粉體，利用含浸法技術將鎳金屬離子吸附於二氧化鈦表面上，並於氫氣氣氛下500 ℃恆溫4小時以進行二氧化鈦表面改質研究，二氧化鈦粉體改質前後之結構變化、粉末外觀尺寸、粉體表面吸附鎳金屬情形、強金屬－載體效應（SMSI）及光催化效率等則分別利用相關儀器檢測之。
經含浸法進行改質後，從EDS成份分析結果顯示，其二氧化鈦表面所吸附之鎳金屬含量相當稀少。由XRD結果得知，M-TiO2粉體進行500 ℃持溫4小時熱處理後，其繞射峰強度與起始粉體粉體相較下並沒有明顯的差異；編號N-TiO2及P-25粉體中在添加鎳金屬表面改質後，其Rutile相結晶性變好。從XAS之Ni K-edge結果發現，編號N-TiO2及NT-TiO2較容易將鎳金屬離子以氫氣還原成原子狀態，然而卻無法觀察其SMSI效應。
由光催化反應結果得知，經過吸附鎳表面改質後之P-25粉體呈現出較佳之光催化降解效率，在經過紫外照射3小時後，幾乎可以完全降解試液中之亞甲基藍。

In the present study, titanium dioxide powders concluding sub-micron (denoted as M-TiO2), nanometer-sized (N-TiO2, STO1, and P-25), and nanotube (NT-TiO2), were modified by adsorbing nickel ions with impregnation process. Post heat treating at 500 oC for 4 hours under reductive hydrogen atmosphere was performed. Characteristics of the titanium dioxide powders before and after surface modification were investigated.
The EDS results showed that only limited amount of nickel was adsorbed on the TiO2 surface. X-ray diffraction results showed that the relative rutile phase within the N-TiO2 and P-25 powders increased after heat treatment, while no distinguishable differences can be observed for M-TiO2 powders. Synchrotron X-ray absorption spectra revealed that nickel ions adsorbed on N-TiO2 and NT-TiO2 powders were reduced to nickel metal after heat treatment. While the reduction of nickel ion was not successfully in the other powders. Strong-metal support interaction phenomenon was not observed for all the powders examined in the present study. P25-TiO2 powders after Ni modification exhibited the best photocatalytic properties where methylene blue can be decomposed completely after 3 hours under UV radiation.

中文摘要 I
Abstract II
總目錄 III
表目錄 VII
圖目錄 VIII
第一章、前言 1
第二章、文獻回顧 3
2.1 觸媒簡介 3
2.2 二氧化碳光觸媒之物化特性 7
2.2.1 二氧化鈦晶體結構 9
2.2.2 光催化反應機制 12
2.2.3 影響光催化活性之因素 13
2.3 二氧化鈦之製備試驗 21
2.3.1 物理氣相沈積法 23
2.3.2 化學氣相沈積法 23
2.3.3 液相沈積法 24
2.3.4 溶膠凝膠法 24
2.3.5 電泳披覆法 25
2.3.6 含浸法 26
2.4 強金屬－載體效應簡介 27
第三章、實驗方法與步驟 31
3.1 二氧化鈦粉體之改質 32
3.1.1 二氧化鈦粉體前處理 32
3.1.2 含浸法製備二氧化鈦粉體改質 33
3.2 二氧化鈦粉體之特性檢測 34
3.2.1 X光繞射分析儀 34
3.2.2 冷場發射掃描式電子顯微鏡 34
3.2.3 高分辨穿透式電子顯微鏡 34
3.2.4 紫外光－可見光光譜儀 35
3.2.5 光催化實驗分析 35
3.2.6 X光吸收光譜分析 37
第四章、結果與討論 39
4.1 微米級（M-TiO2）二氧化鈦粉體之檢測結果 39
4.1.1 M-TiO2顯微結構分析 39
4.1.2 M-TiO2 FESEM結果分析 40
4.1.3 M-TiO2 TEM結果分析 42
4.1.4 M-TiO2 XAS結果分析 43
4.1.5 M-TiO2 UV-Vis及光催化觀察分析 48
4.2 奈米級（N-TiO2）二氧化鈦粉體之檢測結果 51
4.2.1 N-TiO2顯微結構分析 51
4.2.2 N-TiO2 FESEM結果分析 52
4.2.3 N-TiO2 TEM結果分析 54
4.2.4 N-TiO2 XAS結果分析 55
4.2.5 N-TiO2 UV-Vis及光催化觀察分析 59
4.3 奈米級（STO1）二氧化鈦粉體之檢測結果 61
4.3.1 STO1顯微結構分析 61
4.3.2 STO1 FESEM結果分析 62
4.3.3 STO1 TEM結果分析 64
4.3.4 STO1 XAS結果分析 65
4.3.5 STO1 UV-Vis及光催化觀察分析 69
4.4 奈米級（P-25）二氧化鈦粉體之檢測結果 71
4.4.1 P-25顯微結構分析 71
4.4.2 P-25 FESEM結果分析 72
4.4.3 P-25 TEM結果分析 74
4.4.4 P-25 XAS結果分析 75
4.4.5 P-25 UV-Vis及光催化觀察分析 79
4.5 奈米管（NT-TiO2）二氧化鈦之檢測結果 81
4.5.1 NT-TiO2顯微結構分析 81
4.5.2 NT-TiO2 FESEM結果分析 82
4.5.3 NT-TiO2 TEM結果分析 84
4.5.4 NT-TiO2 XAS結果分析 85
4.5.5 NT-TiO2 UV-Vis及光催化觀察分析 89
4.6 強金屬－載體效應觀察結果 91
4.7 二氧化鈦光催化結果 92
第五章、結論 95
參考文獻 96

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