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研究生:蔡文瑜
研究生(外文):Wen-Yu Tsai
論文名稱:聚苯胺輔助奈米碳管在玻璃電極用以偵測抗壞血酸
論文名稱(外文):Polyaniline Modified Carbon Nanotubes on ITO Electrode for Sensing Ascorbic Acid
指導教授:林寬鋸
指導教授(外文):Kuan-Jiuh Lin
學位類別:碩士
校院名稱:國立中興大學
系所名稱:化學系所
學門:自然科學學門
學類:化學學類
論文種類:學術論文
畢業學年度:96
語文別:中文
論文頁數:68
中文關鍵詞:奈米碳管聚苯胺抗壞血酸
外文關鍵詞:carbon nanotubespolyanilineascorbic acid
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利用奈米技術改良或革新化學感測器或生物感測器,應用在偵測物種或者生物分子是近年奈米科技很熱門的研究領域,由於抗壞血酸對於人類在生理以及病理研究上有很重要的意義,因此許多研究如何準確地偵測抗壞血酸。然而以各種材料製作的電極用在偵測抗壞血酸上卻有電極毒化、靈敏度不足等問題。
在本研究中,成功結合奈米碳管以及聚苯胺製作出擁有高靈敏度、再現性的抗壞血酸偵測電極,其濃度線性範圍為10-5-10-2M,偵測極限可達10-5M。
在實驗中藉由拉曼光譜、熱重分析儀、掃瞄電子顯微鏡來鑑定奈米碳管以及聚苯胺的性質與形貌;並且進行電極的電化學性質研究發現:奈米碳管能有效提升電極的導電度(電活性)並且降低抗壞血酸的偵測電位;而以電聚合方式聚合在碳管電極上的聚苯胺則可以輔助奈米碳管催化抗壞血酸氧化,並且利用聚苯胺的高穩定性質確保電極的穩定性。
It is very popular that scientists improve or innovate chemical sensor or biochemical sensor for sensing tissues or bimolecular by nanotechnology. Due to the importance of ascorbic acid (Vitamin C, AA) for human being, many studies has been focus on ascorbic acid detection. But developing a chemical sensor for sensing AA has met many problems, such as electrode fouling, lacking of sensitivity or the instability of electrode.
In this study, we have successfully combined the multi-walled carbon nanotubes (MWNTs) with polyaniline (PANI) to develop a highly sensitive、repeatable electrode for sensing AA. The linear range of response (LRR) is 10-5-10-2M, and the detection limit (LOD) is 10-5M.
We characterized the MWNTs and PANI by Raman spectrum and SEM. We study the electrochemical properties of the electrode and found: MWNTs have several functions for sensing, including the conductivity that can increasing the electroactivity, and lowering the detection potential for AA. PANI which electrodeposited on carbon nanotubes electrode can assist in electrocatalysis to AA, and the stability of PANI ensure the electrode’s stability.
中文摘要 ...............................................i
英文摘要 ...............................................ii
目錄 ...................................................iii
圖目錄 .................................................vii
表目錄.................................................viii

第一章、緒論
1.1 前言..................................................1
1.2 研究動機..............................................3
第二章、文獻回顧
2.1 抗壞血酸..............................................4
2.1.1 抗壞血酸生理意義....................................4
2.1.2 抗壞血酸測定方法....................................5
2.2 電化學...............................................10
2.2.1 電化學基本原理.....................................10
2.2.2 電化學分析方法.....................................15
2.2.3 感測器原理.........................................18
2.2.4 修飾電極...........................................19
2.3 聚苯胺...............................................20
2.3.1 導電高分子.........................................20
2.3.2 聚苯胺合成方法.....................................21
2.3.3 聚苯胺偵測抗壞血酸.................................22
2.4 奈米碳管.............................................27
2.4.1 奈米碳管電極的製作.................................28
2.4.2 奈米碳管的電化學性質...............................30
2.4.3 奈米碳管偵測抗壞血酸...............................32



第三章、實驗部份
3.1實驗策略與架構........................................35
3.1.1 實驗策略...........................................35
3.1.2實驗架構............................................36
3.2 儀器及藥品...........................................37
3.3 實驗步驟.............................................39
3.3.1 奈米碳管噴灑塗佈在導電玻璃.........................39
3.3.2 電化學聚合聚苯胺...................................41
3.3.3 電極電化學性質研究.................................42
3.3.4 偵測抗壞血酸的速率決定步驟.........................43
3.3.5 抗壞血酸的偵測......................................43
第四章、結果與討論
4.1 電極製備.............................................47
4.1.1 奈米碳管電極性質鑑定...............................47
4.1.2 聚苯胺修飾奈米碳管電極性質鑑定.....................51
4.2 電極電化學性質分析...................................53
4.2.1 奈米碳管電極電化學性質.............................53
4.2.2 聚苯胺修飾奈米碳管電極的電化學性質.................55
4.3 抗壞血酸濃度分析.....................................60
4.3.1電位選擇............................................60
4.3.2 偵測極限...........................................61
4.3.3 電極的生命週期.....................................64
第五章、結論與未來展望...................................65
參考文獻.................................................67
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