輻射敏感型光觸媒之開發與研究｜國立清華大學博碩士論文庫

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研究生：	余慶聰 Ching-Tsung Yu
論文名稱：	輻射敏感型光觸媒之開發與研究 The development of radio-sensitive photocatalyst
指導教授：	王竹方 Chu-Fang Wang
口試委員:
學位類別：	博士 Doctor
系所名稱：	原子科學院 - 生醫工程與環境科學系 Department of Biomedical Engineering and Environmental Sciences
論文出版年：	2007
畢業學年度：	95
語文別：	中文
論文頁數：	131
中文關鍵詞：	二氧化鈦、氟化鋇、氧化鈰、輻射敏感型光觸媒
外文關鍵詞：	TiO2, BaF2, CeO2, Radio-sensitive photocatalyst
相關次數：	點閱：3 下載：0
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本研究目的為輻射敏感型光觸媒(以下稱為輻射觸媒)之開發及其光催化特性之研究，結合TiO2光觸媒與鋇Ba、鈰Ce輻射敏感元素，開發出能利用加馬、貝他輻射能激發TiO2 潛能之輻射觸媒材料。研究中合成三類光觸媒材料：(1) BaF2/TiO2/陶瓷粉，(2) CeO2/TiO2/陶瓷粉及(3) TiO2/monazite。上述觸媒是利用四氯化鈦水解，硝酸鋇/氟化鈉反應先分別獲得含有鈦、鋇前驅物，再經由基材吸附及450℃燒結而成。另外嘗試在UV光照下，加入甲醇作為還原劑，使得TiO2 表面沉積CeO2。上述觸媒係經BET、SEM/EDS、XRD與ICP-AES分別用於觸媒之比表面積、表面形貌/粒徑、晶型及元素含量測定。鑑定結果顯示，基材表面含有4.6% TiO2 (10~20 nm, anatase, grain)，3.8% BaF2 (200~500 nm, Frankdicksonite, cubic)，及0.2% CeO2 (5 nm, grain) 微粒。
在測試光觸媒性能實驗中，分別利用UV光及60Co 作為激發能源，結果顯示觸媒對於亞甲基藍(MB)、酚、有機樹脂皆有良好的分解效果。在1 Gy以下的照射劑量(約1 MBq60Co照射20 小時)下，可以將10 ppm MB完全分解，而1 克樹脂粒子全部分解成可溶性有機物。證明利用輻射觸媒在低劑量時，確實可以完全分解有機物。研究中嘗試利用輻射放光(Radioluminescence)、複合半導體間界面電位(Heterojunction, HJ) 等協同作用(Synergistic effect)之機制，來解釋輻射敏感物質鋇、鈰吸收輻射引發TiO2 光催化現象，及UV、60Co對於陶瓷粉等基材，於改質前後TiO2 表面遮蔽之探討。

第一章  前言.............................................................................................1
  1-1 研究緣起.....................................................................1
  1-2 研究目的與內容..................................................................3
第二章  文獻回顧.....................................................................................6
  2-1 光催化反應原理、限制及輻射催化研究......................................6
    2-1-1 光觸媒反應原理.............................................................8
    2-1-2 影響光觸媒反應速率的因素................................................12
    2-1-3 UV光觸媒應用的限制..........................................................17
    2-1-4國外與輻射相關的光觸媒研究............................................21
  2-2 以輻射能引發TiO2之作用模式..................................................24
    2-2-1輻射直接激發TiO2.............................................................24
    2-2-2輻射敏感物質之輻射放光................................................27
    2-2-3 複合半導體材料............................................................30
  2-3 觸媒合成方法..........................................................................35
    2-3-1 水相螯合方式...................................................................37
    2-3-2 光催化合成.....................................................................39
第三章  實驗及方法......................................................................41
  3-1 實驗藥品與儀器設備...........................................................41
  3-2 觸媒製備方法...........................................................................43
    3-2-1 BaF2/TiO2/陶瓷粉合成....................................................44
    3-2-2 CeO2/TiO2/陶瓷粉合成.....................................................45
    3-2-3 TiO2/monazite合成........................................................46
  3-3觸媒基本性質鑑定........................................................................46
  3-4 有機物催化分解實驗…………………………………………...48
    3-4-1 BaF2/TiO2/陶瓷粉降解亞甲基藍.......................................49
    3-4-2 BaF2/TiO2/陶瓷粉降解樹脂........................................50
    3-4-3 CeO2/TiO2/陶瓷粉降解亞甲基藍.....................................50
    3-4-4 TiO2/monazite降解亞甲基藍、酚...................................50
第四章 結果與討論.................................................................................52
  4-1觸媒特性分析............................................................52
    4-1-1 BaF2/TiO2/陶瓷粉複合材料........................................52
    4-1-2 CeO2/TiO2/陶瓷粉複合材料..................................................57
    4-1-3 TiO2/monazite基材....................................................61
  4-2 觸媒催化分解性能測試..............................................69
    4-2-1 BaF2/TiO2/陶瓷粉降解亞甲基藍...........................................70
    4-2-2 BaF2/TiO2/陶瓷粉降解有機樹脂.....................................73
    4-2-3 CeO2/TiO2/陶瓷粉降解亞甲基藍......................................77
    4-2-4 TiO2/monazite降解亞甲基藍及酚.........................................80
  4-3 反應機制探討.............................................................86
    4-3-1 輻射放光(Radioluminescence, RL)..................................87
    4-3-2 複合半導體間界面電位(Heterojunction, HJ).......................91
第五章 結論與建議................................................................................96
  5-1 結論...............................................................................96
  5-2 建議..........................................................................99
致謝.........................................................................................................101
參考文獻....................................................................................102

附件1  TiO2與BaF2合成於矽膠基材之XPS圖譜.............................109
附件2(研究期間發表期刊及會議論文)
附件 2.1 Synthesis and characterization of TiO2/BaF2/ceramic
        radio-sensitive photocatalyst(J Photo. Photo. A:Chem.期刊)110
附件 2.2 Decomposition of Organic Resin by Radio-sensitive
 Photocatalyst(J Photo. Photo. A:Chem. 期刊)………….......116
附件 2.3 Synthesis and Characterization of Self-activated TiO2/monazite
 Photocatalyst(2006 APAWTGORT國際會議)……..…….....123
附件 2.4 Photosynthesis and characterization of Pt, Fe and Ag modified
TiO2(2006 APAWTGORT國際會議)………………..…..…...127

                                

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