臺灣博碩士論文加值系統

利用靜電紡織法制備半導體氧化物以及金屬氧化物半導體材料，搭配自製光觸媒設備光催化分解亞甲基藍(Methylene blue, MB)。並使用高解析掃描式電子顯微鏡、穿透式電子顯微鏡、X薄膜繞射儀，探討材料的結構性質與表面形貌。本研究以二氧化鈦(TiO2)奈米纖維結構製作出複合奈米材料為主題，探討以靜電紡織製程技術製作二氧化鈦奈米纖維的最佳參數，再以不同濃度摻雜硝酸銀和氧化石墨烯，找出最佳摻雜濃度比例，分別形成 TiO2/Ag 和TiO2/GO 異質結構；探討各材料使用不同退火溫度後對材料之影響。在紫外光以及可見光的光照下，TiO2/Ag複合光觸媒材料表現出比純TiO2光催化更好的光催化效率，提升了50%的降解率；本研究最後探討TiO2/GO在可外光和可見光的催化特性，最佳摻雜比例為7wt%氧化石墨烯，可有效提升42%的降解率。

The semiconductor oxide and the metal oxide semiconductor material are prepared by the electrospinning method, and the photocatalytic decomposition of methylene blue (MB) is carried out by using a self-made photocatalyst device. High-resolution scanning electron microscopy, transmission electron microscopy, and X-film diffractometer were used to investigate the structural properties and surface morphology of the material. The topic of this paper is to element with a tin oxide (TiO2) nanofiber structure, and discuss the optimal parameters for the production of tin oxide nanofibers using electrostatic spinning process technology, and doping with silver nitrate and graphene oxide at different concentrations. Formation of TiO2/Ag and TiO2/GO heterostructures, respectively exploring the influence of different materials after annealing temperature. Under the irradiation of ultraviolet light and visible light, the TiO2/Ag composite photocatalyst material exhibited better photocatalytic efficiency than pure TiO2 photocatalyst and improved the degradation rate by 50%. Finally, the study investigated the catalytic properties of TiO2/Go in ultraviolet light and visible light. The optimum doping ratio was 7wt% graphene oxide, which effectively improved the degradation rate by 42%.

摘要 i
Abstract ii
誌謝 iii
目錄 iv
表目錄 vii
圖目錄 viii
第1章 緒論 1
1.1 前言 1
1.2 研究動機與目的 4
1.3 本文架構 5
第2章 基礎原理與文獻回顧 6
2.1 二氧化鈦 6
2.2 硝酸銀 8
2.3 氧化石墨烯 9
2.3.1 氧化石墨烯製備方法 11
2.3.1.1 還原氧化石墨法 11
2.3.1.2 化學氣相沉積法 11
2.3.1.3 液相剝離法 12
2.4 靜電紡絲 12
2.4.1 靜電紡絲影響參數 14
2.4.2 無機/高分子複合物材料 16
2.5 光觸媒介紹 16
2.5.1 光催化原理 16
2.5.2 量子尺寸效應 16
2.5.3 二氧化鈦光催化反應機制 17
2.5.4 半導體光觸媒種類 19
2.6 二氧化鈦改質 20
2.6.1 摻雜非金屬離子 20
2.6.2 摻雜金屬離子 20
第3章 實驗架構與分析設備 21
3.4 光催化實驗 35
3.5 實驗製程設備 37
3.6 實驗分析儀器 41
第4章 結果與討論 46
4.1 靜電紡絲法製備TiO2奈米纖維 46
4.1.1 熱重分析 46
4.1.2 X光繞射分析 47
4.1.2 高解析場發射電子顯微鏡分析 48
4.1.3 高解析穿透式電子顯微鏡 50
4.1.4 比表面積分析 52
4.1.5 光催化實驗 52
4.1.5.1 無添加光觸媒直接光照 52
4.1.5.2 pH值對亞甲基藍的影響 53
4.1.5.3 鍛燒溫度對材料催化性能影響 54
4.1.5.4 二氧化鈦奈米材料對紫外光、可見光的催化性能 55
4.2 靜電紡絲法製備TiO2/Ag奈米纖維 58
4.2.1 TiO2/Ag摻雜參數 58
4.2.2 熱重分析 58
4.2.3 X光繞射分析 59
4.2.4 高解析場發射電子顯微鏡分析 60
4.2.5 高解析穿透式電子顯微鏡 61
4.2.6 TiO2/Ag奈米材料對紫外光、可見光的催化性能 63
4.2.7 TiO2/Ag光催化機制 66
4.3 靜電紡絲法製備TiO2/GO奈米纖維 67
4.3.1 TiO2/GO摻雜參數 67
4.3.2 熱重分析 67
4.3.3 X光繞射分析 68
4.3.4 高解析場發射電子顯微鏡分析 69
4.3.5 高解析穿透式電子顯微鏡 70
4.3.6 TiO2/GO奈米材料對紫外光、可見光的催化性能 73
4.3.7 TiO2/GO光催化機制 76
第5章 結論 77
5.1 結論 77
5.2 未來展望 79
參考文獻 80
個人簡歷 86

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