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研究生： 周佳慶
chou, chia-chin
論文名稱： 以脈衝雷射法製備奈米Mo-TiO2與La-TiO2及其光催化性質探討
Photocatalytic degradation properties of Mo-TiO2 and La-TiO2 nanocomposites prepared by pulsed laser ablation
指導教授： 黃守仁
Whang, Thou-Jen
學位類別： 碩士
Master
系所名稱： 理學院 - 化學系碩士在職專班
Department of Chemistry (on the job class)
論文出版年： 2005
畢業學年度： 93
語文別： 中文
論文頁數： 79
中文關鍵詞： 光催化 、脈衝雷射法
外文關鍵詞： Photocatalytic, Mo-TiO2
相關次數： 點閱：49  下載：0 
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    • 　　本實驗是藉由脈衝雷射剝削法(pulsed laser ablation)製備Mo-TiO2、La-TiO2，其中分別以不同雷射功率對二氧化鈦(P25)作改質探討，對改質光觸媒經由紫外光-可見光光譜(UV-VIS Absorption Spectroscopy)、X-ray繞射光譜(X-Ray Diffraction Spectroscopy)與螢光光譜(Photoluminescence spectroscopy)等光譜來探討改質效果，實驗選擇以可見光對甲烯藍溶液進行光催化能力研究，證明經改質的La-TiO2與Mo-TiO2在可見光下能提升光催化能力。

    　In this study, Mo-TiO2 and La-TiO2 nanocomposites were prepared by pulsed laser ablation with different laser power. The nanoparticles were investigated by UV-VIS absorption spectroscopy、X-ray diffreation and photoluminescence spectroscopy. At the same time, methylene blue was utilized as a model compound for the decomposition under the visible light. The experiments demonstrated that the methylene blue in aqueous solution can be raised photodegraded more efficieienty under both of La-TiO2 and Mo-TiO2.

    中文摘要………………………………………………….……….……........I 英文摘要………………………………………………….……….………...II 目錄……………………………………………………….….……………...Ⅲ 圖目錄…………………………………………………….…….…………...Ⅶ 表目錄…….……………………………………………………….………...XI 第一章、緒論……………………………………………………...….….….1 1.1研究動機…………………………………………………………….1 1.2表面修飾法…………………………………………………...……..5 1.2.1 溶膠-凝膠法…………...……………...…………...................6 1.2.2 濕浸法……………………………...….…………..................6 1.2.3 水熱法…………………………………....………..................7 1.2.4 金屬離子束植入法………………….……....…...……...…...8 1.2.5 脈衝雷射剝削法……………………………....…...…...…....9 1.2.6 輻射化學合成法………………………………….…………11 第二章、原理……………………..……………………....................…...…13 2.1光觸媒二氧化鈦晶型結構…………............................…....…...….13 2.2表面吸附原理…………...............……...…………….….……...….14 2.3 異相催化…………....................…………..………....……………14 2.4光催化原理...........................…...………………………………….15 2.4.1光激發....…………………………………………….………15 2.4.2半導體的光催化………………………………………….…17 2.4.3電荷載子捕捉………………………………………….……18 2.5二氧化鈦光催化…………………………..……………………….19 2.5.1二氧化鈦光催化氧化還原反應…………………….………19 2.5.2二氧化鈦光催化有機顏料反應機構…………………….…21 2.6脈衝雷射剝削理論………………………..……………………….22 2.7 奈米粒子量子尺寸化效應………………..………………………22 2.8 X-ray繞射光譜…………………………......………………....…...24 第三章、實驗方法…………………………………………………………25 3.1 實驗目的…………………………………………………………..25 3.2 實驗步驟…………………………………………………………..25 3.3 脈衝雷射剝削改質法………………………………....…………..28 3.4 甲烯藍光降解實驗………………………………………………..29 3.5 光觸媒光譜鑑定…………………………………………………..31 3.5.1 擴散反射-紫外可見光譜……………………………….…..31 3.5.2 X-ray繞射光譜…………………………………….………..32 3.5.3 螢光光譜……………....…………………..…….....……….33 3.6 使用試劑………………………………..…………………....…....34 第四章、實驗結果與討論………………………..……………………......36 4.1 La/P25 光觸媒探討……………….…..…………….….….............36 4.1.1 La/P25 X-ray繞射光譜研……..………………….............36 4.1.2 La/P25擴散反射-紫外可見光光譜研究………................38 4.1.3 La/P25 螢光光譜研究……. ....………………...................41 4.1.4 La/P25 光觸媒光降解性質探討….…….......….................43 4.2 Mo/P25光觸媒探討…………………...…………………..............46 4.2.1 Mo/P25 X-ray繞射光譜研究…………..............................46 4.2.2 Mo/P25擴散反射-紫外可見光光譜研究...........................48 4.2.3 螢光光譜研究…………..…………………........................50 4.2.4 Mo/P25光觸媒光降解性質探討…..……………...……...52 4.3 鹵素光源波長測定……………………...…….…………..............54 4.4二氧化鈦X-ray繞射光譜研究………..………..……....................54 4.5比表面積BET研究…………..........................................................55 第五章、結論…………..…………………..................................................57 參考文獻…………..……….........………….................................................58 附錄 附錄一 光觸媒甲烯藍光降解UV-VIS吸收值數據........................61 附錄二 X-光繞射光譜圖...................................................................74 附錄三 甲烯藍檢量線.......................................................................79

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