臺灣博碩士論文加值系統

本實驗主要研究為二氧化鈦光觸媒之製作，及其對空氣中揮發性有機氣體之去除。
二氧化鈦光觸媒的製作方面主要由溶膠-凝膠法，以化學合成的方式製作光觸媒溶膠再將其經高溫鍛燒而得，其中選擇以鹽酸及硝酸作為解膠劑。所製成的二氧化鈦晶體以X-光繞射分析判斷是否結晶成所需的銳鈦礦晶形。當以150℃燒結時，已有部分波峰出現但不明顯，以300℃燒結時，anatase phase 的三個較強繞射峰(2θ=25.4、48.2、37.9度)清楚可見，至500℃鍛燒時，除anatase phase出現外，尚有rutile phase的波峰出現，可見此時已有相變化產生。
而為因應基材的耐高溫性，本實驗尚加入SiO2作為黏著劑，並以UV吸收光譜測知其對TiO2的吸收波長的影響，當以商用P25的二氧化鈦之UV吸收光譜（345nm）作為比較，發現僅有少量移轉，可見二氧化矽對二氧化鈦的受光分解有機物的影響有限。
光觸媒之VOC（有機揮發性氣體）去除測試中，對VOC之去除方面，初步結果乙醇的分解效果最好，甲苯次之，異丙醇再次之。以鹽酸作為解離劑較硝酸所製成的二氧化鈦，在500℃鍛燒溫度下，在針對乙醇的分解中，有高於三倍的分解能力。

The present thesis is dedicated to the study of the titanium dioxide photocatalytic material and photochemical process in view of indoor air purification.
Nanostructured titanium dioxide was employed as the photocatalyst for degradation of volatile organic compounds (VOCs). Titania sol can be prepared by chemical synthesis via sol-gel process, and formation of either an anatase or a rutile phase crystalline is respected to the annealing temperature. An amorphous surface obtained at 150℃ heat treatment, following the increase of temperature therefore at the temperature of 300℃ anatase phase appeared at 2θ=25.5, 48.2, 37.9 degree under the X-ray diffraction pattern investigation, at the temperature of 500℃ annealing therefore resulting both of anatase and rutile phases of crystalline implying evolution of the anatase to the rutile phase.
To enlarge the application of titanium dioxide photocatalyst therefore the formation of crystalline at low temperatures is expected. An inorganic silicon oxide SiO2 which is chemical stability to the TiO2 photocatalyst, the it can be employed as the adhesion binder between a target and the TiO2 photocatalyst resulting thin films formation at the room temperature. Both titanium dioxide photocatalyst and TiO2-SiO2 hybrid particles were carefully examined by using UV-VIS spectroscopy, the action absorption spectrum remained almost the same resulting the threshold energy for TiO2 photocatalyst was not influenced.
Photocatalytic degradation experiments were investigated by using three frequent appeared indoor VOCs such as ethanol, toluene and isopropyl alcohol. The degradation rate was calculated following the mechanism of Langmuir isotherm where the rate constant represented as the ease of degradation process, comparison of these VOCs in this experiment where ethanol was the fastest then toluene and isopropyl alcohol was the last. In addition, the TiO2 photocatalyst prepared by using hydrochloric acid as degelatification agent and annealed at 500℃ showed a significant photodegradation rate constant, it is three times faster, in the case of using ethanol as the reactant.

目錄1
圖目錄4
表目錄6
謝 誌7
摘 要8
Abstract9
第一章 緒論11
1.1研究動機11
1.2研究目的12
1.3研究流程13
第二章 文獻回顧14
2.1 揮發性有機化合物(VOCs)之定義14
2.2 VOCs對人體之影響17
2.3 光觸媒之發展21
2.3.1全球整體發展21
2.3.2各國發展情形23
2.4光觸媒之選擇25
2.5光觸媒原理31
2.6光觸媒分解VOCs之文獻34
2.6.1甲苯34
2.6.2苯35
2.6.3二甲苯35
2.6.4丙酮35
2.6.5甲醛36
2.6.61-丁烯36
2.6.7 其他36
2.7光觸媒之製備36
2.7.1溶膠凝膠法（Sol-Gel）36
2.7.2 化學氣相沉積法(CVD)37
2.7.3 其他38
第三章研究方法39
3.1實驗設備39
3.1.1 採樣和分析裝置39
3.1.2有機分析儀器49
3.2實驗儀器及藥品51
3.2.1實驗儀器51
3.2.2實驗藥品52
3.2.3實驗儀器之操作條件52
3.3實驗流程與測試方法54
3.3.1 光觸媒級TiO2之製造54
3.3.2揮發性有機化合物之測試流程56
第四章 實驗結果與討論58
4.1 二氧化鈦性質測定58
4.1.1 X-光繞射58
4.1.2 比孔表面積 ( BET )64
4.1.3 UV-吸收光譜65
4.2 檢量線之製作69
4.2.1 檢量線之製作方法69
4.2.2 結果69
4.3 VOCs分解測定74
4.4 乙醇分解測定78
4.4.1 燒結溫度之影響78
4.4.2 解膠劑之影響81
第五章 結論84
第六章 參考文獻85

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