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研究生:林君怡
研究生(外文):Jyun-Yi Lin
論文名稱:以微波法製備奈米二氧化鈦之研究
論文名稱(外文):A Study on the Preparation of TiO2 Nanoparticles by Microwave
指導教授:蔡德華
指導教授(外文):Teh-Hua Tsai
口試委員:方旭偉郭文正張裕祺
口試日期:2008-07-07
學位類別:碩士
校院名稱:國立臺北科技大學
系所名稱:化學工程研究所
學門:工程學門
學類:化學工程學類
論文種類:學術論文
論文出版年:2008
畢業學年度:96
語文別:中文
論文頁數:72
中文關鍵詞:微波法二氧化鈦奈米四氯化鈦
外文關鍵詞:MicrowaveNanoparticleTitanium dioxideTitanium tetrachloride
相關次數:
  • 被引用被引用:7
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  • 下載下載:9
  • 收藏至我的研究室書目清單書目收藏:0
奈米二氧化鈦具有熱特性、光學性及光觸媒等性質,是目前最受矚目的奈米材料之一,其主要可做為功能性的材料、吸附劑、化妝品、觸媒及氣體偵測器。再者,因為奈米尺寸的二氧化鈦可吸收大部分的有害UV輻射,保護物體免受破壞,在新一代的化妝品、遮光劑、塑膠著色劑、奈米塗料具有很大的開發潛力。本文選擇微波法製備奈米級二氧化鈦,因微波法具有:(a)均勻快速加熱(b)縮短反應時間(c)產物純度高之特點。
實驗中,先將四氯化鈦加水,使水解成穩定的二氯氧化鈦水溶液,以其為起始物。藉由改變微波功率、起始物濃度及pH值,觀察二氧化鈦顆粒的大小。將所生成的產物稀釋20倍,以DLS粒徑分析儀測量產物大小,根據實驗結果可知,當四氯化鈦起始濃度界於0.5M~1M可產生奈米級的二氧化鈦顆粒,而以0.7M的粒徑最小,平均直徑為12.5nm。而當改變生成物之pH值,粒徑大小會隨著pH增加而變大,然而以微波功率25~70W加熱所產生的粒徑差異不大。最後以SEM、XRD觀察其結構及表面。
At present, titanium dioxide (TiO2) is one of the most interesting nanostructured materials,because it has excellent optical, electrical, photocatalytic and thermal properties. It is mainly used as a functional material, adsorbent, cosmetic,catalyst, and gas sensor. Furthermoer, nanocrystalline TiO2 has a great potential for the new generation of cosmetics, plastics ,sunscreens and coatings, which absorb most of the harmful UV radiation resulting in greater protection. In our investigation,we use microwave to prepare TiO2 nanoparticles because it has several characteristics, such as heating rapidly and evenly, saving time of the reaction and producting pure.
In our experiments, TiCl4 was diluted with distilled water to 2 M TiOCl2, which is a stable chemical formula and is used as the reactant. We observed the effects of changing concentraction of the reactant, the power of microwave and pH on the particle size of TiO2.
According to the experimets, we found that when the concentraction of reactant is 0.7 M nanoparticle size is about 12.5 nm and the particle size increases dramaticly with pH values. However the particle size did not very much with microwave power 25~70W. Finally, we used X-ray diffraction and scanning electron microscopy to identify the crystalline phases and morphology of TiO2.
目 錄

中文摘要 i
英文摘要 ii
誌謝 iii
目錄 iv
表目錄 vi
圖目錄 vii
第一章 緒論 1
1.1 研究背景 1
1.2 研究動機與目的 3
第二章 文獻回顧 4
2.1 奈米簡介 4
2.2 微波簡介 7
2.3 二氧化鈦 12
2.3.1 晶體結構與性質 12
2.3.2 二氧化鈦應用 15
2.3.2.1 光觸媒 15
2.3.2.2 通訊傳輸材料 18
2.3.2.3 新型能源 18
2.4 二氧化鈦製備方法 20
2.4.1 溶膠凝膠法(sol-gel) 20
2.4.2 熱水解法.................................................................................. 23
2.4.3 水熱法...................................................................................... 23
2.4.4 微乳膠法.................................................................................. 24
第三章 實驗設備與方法................................................................................25
3.1 實驗藥品.......................................................................................... 25
3.2 實驗設備...........................................................................................26
3.3 實驗流程及步驟...............................................................................27
3.4 實驗分析項目與方法.......................................................................30
3.4.1 X-ray 繞射儀 (XRD) .............................................................30
3.4.2 粒徑分析 (Zeta sizer) ............................................................31
3.4.3 掃描式電子顯微鏡 (SEM) ...................................................32
第四章 結果與討論.........................................................................................34
4.1 二氧化鈦之粒徑分析.........................................................................34
4.1.1 改變TiOCl2起始物的濃度.......................................................34
4.1.2 改變微波功率............................................................................38
4.1.3 改變pH值.................................................................................48
4.2 二氧化鈦之SEM分析......................................................................65
4.3 二氧化鈦之XRD分析......................................................................67
第五章 結論......................................................................................................68
參考文獻 ....69
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