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研究生：	曾建霖 Tseng, Chien-Lin
論文名稱：	乙醇胺在二氧化鈦粉末表面上的吸附與反應研究 Adsorption and Reactions of Ethanolamine on Powdered TiO2
指導教授：	林榮良 Lin, Jong-Liang
學位類別：	碩士 Master
系所名稱：	理學院 - 化學系 Department of Chemistry
論文出版年：	2009
畢業學年度：	97
語文別：	中文
論文頁數：	62
中文關鍵詞：	光化學、吸附、乙醇胺、傅式轉換紅外光譜、二氧化鈦
外文關鍵詞：	FTIR, TiO2, Photochemistry, Adsorption, Ethanolamine
相關次數：	點閱：95 下載：1
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乙醇胺的鹼性溶液在石油工業上常被用來吸收酸氣分子，如CO2和H2S。但乙醇胺的揮發逸出會造成環境的汙染。本論文於氣-固系統中利用原位(in-situ)傅式轉換紅外光譜(FTIR)研究乙醇胺在二氧化鈦上的吸附與光化學反應。因為乙醇胺同時具有NH2和OH兩個官能基，我們也同時研究正丙胺和正丙醇的吸附。比較這些分子的吸附紅外光譜圖後，我們發現乙醇胺在35 oC的溫度下是以分子性吸附與分解性吸附NH2CH2CH2O(a)在二氧化鈦表面。300 oC時，分子性吸附的乙醇胺會脫附，二氧化鈦表面上只存在NH2CH2CH2O(a)。乙醇胺/二氧化鈦在氧氣存在下，會光分解可能生成NCO(a)、HCOO(a)、NO3-(a)、HCONH(a)、NH2CH2CHO(a)、OCH2CH2OH(a)、NH2CH2COO(a)、CO2(g) 等物種生成。在高吸附量的情形下，照光反應4小時約~5 % 的乙醇胺產生光反應。我們也探討了這些產物的可能反應路徑。

Ethanolamine in alkaline solutions are often used as absorber to remove acid gas, such as CO2 and H2S in petrochemical plants. However, the evaporation of ethanolamine would cause environmental problems. The adsorption and photochemistry of ethanolamine on TiO2 have been investigated by Fourier-transformed infrared spectroscopy in an in-situ gas-solid interaction system. Since ethanolamine possesses the functional groups of NH2 and OH. The adsorption of n-propylamine and n-propanol on TiO2 is also studied. The comparison of the infrared spectra measured after the adsorption of these three molecules shows that ethanolamine is adsorbed molecularly and dissociatively to form NH2CH2CH2O(a) on TiO2 surface at 35 oC. Upon increasing the temperature to 300 oC, ethanolamine molecules are desorbed and the surface is covered with NH2CH2CH2O(a). NCO(a), HCOO(a), NO3-(a), HCONH(a), NH2CH2CHO(a), OCH2CH2OH(a), NH2CH2COO(a), CO2(g) are possibly generated in the UV irradiation of ethanolamine/TiO2 in the presence of O2. Approximately ~5 % ethanolamine molecules at high coverage decompose under 4 hr photoirradiation. Possible reaction pathways for the photoproducts are discussed.

第一章 緒論.................................................1
  1-1 前言....................................................1
  1-2 光催化..................................................1
  1-3 TiO2的光催化............................................ 3
  1-4 TiO2晶體結構............................................ 7
  1-5 TiO2光催化反應的發展.................................... 8
  1-6乙醇胺的一些性質及應用和研究動機....................... 10
第二章 實驗系統及實驗方法................................12
  2-1實驗系統概述........................................... 12
     2-1-1 儀器..............................................14
     2-1-2 藥品..............................................15
  2-2傅氏轉換紅外線光譜系統.................................16
     2-2-1 光源..............................................16
     2-2-2 偵測器............................................17
  2-3 汞燈系統(Mercury lamp system)............................17
  2-4 真空系統...............................................18
 2-4-1 熱偶極真空計和電容真空計的基本原理................ 18
     2-4-2 紅外光譜樣品槽(IR cell)的設計....................... 19
  2-5二氧化鈦/鎢網(TiO2/W)的製備............................. 22
     2-5-1 TiO2/W的製備..................................... 22
     2-5-2 TiO2/W在紅外光譜樣品槽(IR cell)的擺放位向........... 22
     2-5-3 TiO2/W的前處理....................................23
  2-6藥品的前處理...........................................24
第三章 結果與討論.........................................25
  3-1 乙醇胺(H2NCH2CH2OH)的吸附和熱反應研究...............25
  3-2乙醇胺在TiO2上的光反應.................................30
     3-2-1 文獻上乙醇胺的光化學..............................30
     3-2-2 有氧存在下高覆蓋率(coverage)的乙醇胺/TiO2光反應.....30
第四章 結論................................................58
參考文獻................................................... 59
                                    

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