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完整後設資料紀錄
DC 欄位 | 值 | 語言 |
---|---|---|
dc.contributor.advisor | 陳林祈 | zh_TW |
dc.contributor.advisor | Lin-Chi Chen | en |
dc.contributor.author | 吳秉軒 | zh_TW |
dc.contributor.author | Ping-Hsuan Wu | en |
dc.date.accessioned | 2023-10-03T16:27:21Z | - |
dc.date.available | 2023-11-10 | - |
dc.date.copyright | 2023-10-03 | - |
dc.date.issued | 2023 | - |
dc.date.submitted | 2023-08-08 | - |
dc.identifier.citation | Almario, Á. A. A., & Cáceres, R. L. T. (2014). Electronic tongue and neural networks, biologically inspired systems applied to classifying coffee samples. American Journal of Analytical Chemistry, 05(04), 266–274.
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dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/90519 | - |
dc.description.abstract | 本研究旨在開發一基於亞鐵氰化銅之伏安式咖啡風味分子感測器。亞鐵氰化銅為一普魯士藍類似物,能以電化學氧化還原躍遷的方式催化許多分子進行氧化反應,因此被用於本研究所開發之感測器。然而,此材料由於水相溶液中之Ksp較低以及較差的黏著性而不利於電鍍修飾。因此,本研究針對鍍液進行KCl, HCl含量進行調控,並比較各電位下電鍍之電極穩定度。於製程優化後,於掃描式電子顯微影像將呈現一均勻薄膜之表面微結構。並且可以電化學循環伏安法中檢驗達0.93 mC/cm2之電量與70 %之電鍍庫倫效率,以及於電化學阻抗頻譜中呈現4.89 Ω之電荷轉移阻抗 (Rct)。以此電極用於伏安式分子感測器可對不同分子具有不同峰值電位響應,分別為0.52 V之咖啡酸、0.53 V之綠原酸、0.71 V之愈創木酚以及0.82 V之香草醛。各風味分子中,愈創木酚具有燃木焦香味,對於咖啡為之風味影響甚大,因此本研究便以此分子為例,進行感測應用與反應機制探討。本研究首先以電化學循環伏安法探討其反應機制。以亞鐵氰化銅催化愈創木酚之氧化反應為牽涉兩電子轉移之ErCi反應,其速率決定步驟為愈創木酚分子於水溶液中之質量傳遞並符合Randles–Ševčík 公式。於感測應用中,此感測器於低濃度下具有對愈創木酚109.5 µA/cm2 mM之靈敏度,並可達7.09 µM之理論偵測下限。此感測器於長時間、多圈數使用或於較高濃度環境下則容易被毒化。此毒化現象經循環伏安法與電化學阻抗頻譜分析推論係由愈創木分之氧化物所造成。然而由於此感測器足夠低之偵測下限,依舊可於稀釋之咖啡樣品中完成感測。 | zh_TW |
dc.description.abstract | This study aims to develop a voltammetric sensor for coffee flavor molecules based on copper hexacyanoferrate. Copper hexacyanoferrate, a Prussian blue analogue, catalyzes the oxidation of various molecules through electrochemical redox hopping, making it suitable for the development of sensors. However, its application is hindered by its low solubility in aqueous solutions and poor adhesion for electrodeposition. Therefore, this research focused on adjusting the KCl and HCl contents in the plating solution and compared the electrode stability at different applied potentials. After process optimization, the scanning electron micrograph showed a uniform thin film surface microstructure. The thin film was characterized with a charge capacity of 0.93 mC/cm2, a plating efficiency of 70%, and a charge transfer resistance (Rct) of 4.89 Ω. This electrode was applied for a voltammetric sensor, which exhibits distinct peak potentials for various flavor molecules, including 0.52 V for caffeic acid, 0.53 V for chlorogenic acid, 0.71 V for guaiacol, and 0.82 V for vanillin. Among these molecules, guaiacol imparts a smoky aroma to coffee and is significant in flavor discrimination. Therefore, this study focuses on guaiacol to investigate its sensing application and reaction mechanism. Using cyclic voltammetry, the oxidation of guaiacol catalyzed by copper hexacyanoferrate was found to be an ErCi reaction involving two-electron transfer. The rate-determining step corresponds to the mass transfer of guaiacol molecules in the aqueous solution and fits with the Randles–Ševčík equation. In the sensing application, this guaiacol sensor exhibits a sensitivity of 109.5 µA/cm2 mM at low concentrations and a theoretical LOD of 7.09 µM. However, prolonged use or exposure to higher concentrations could lead to poisoning of electrodes. This is attributed to the oxidation products of guaiacol, as observed with cyclic voltammetry and electrochemical impedance spectroscopy. Nevertheless, due to its low enough LOD, the sensor remains capable of detecting guaiacol in diluted coffee samples effectively. | en |
dc.description.provenance | Submitted by admin ntu (admin@lib.ntu.edu.tw) on 2023-10-03T16:27:21Z No. of bitstreams: 0 | en |
dc.description.provenance | Made available in DSpace on 2023-10-03T16:27:21Z (GMT). No. of bitstreams: 0 | en |
dc.description.tableofcontents | 致謝 i
中文摘要 ii Abstract iii 目錄 v 表目錄 ix 圖目錄 x 符號說明 1 第一章 緒論 3 1.1 前言 3 1.2 研究動機 5 1.3 研究目的 6 1.4 研究架構 7 第二章 文獻探討 8 2.1 普魯士藍類似物 8 2.2 普魯士藍類似物電極修飾 13 2.2.1 銦錫氧化物電極基材 14 2.2.2 多步驟電鍍普魯士藍類似物 14 2.2.3 一步驟修飾普魯士藍類似物電極 15 2.3 咖啡風味分子 17 2.4 亞鐵氰化銅電催化愈創木酚之機制探討 21 第三章 材料與方法 25 3.1 實驗材料與儀器 25 3.1.1 實驗材料 25 3.1.2 實驗設備 26 3.2 以光譜學驗證普魯士藍類似物對酚類物質之響應 27 3.3 玻璃碳電極修飾 28 3.3.1 修飾亞鐵氰化銅於玻璃碳電極 28 3.3.2 以PEDOT電鍍包埋亞鐵氰化銅於玻璃碳電極 28 3.3.3 玻璃碳修飾電極之感測應用 29 3.4 銦錫氧化物修飾電極製備 30 3.4.1 銦錫氧化物電極前處理 30 3.4.2 普魯士藍銦錫氧化物電極製備 31 3.4.3 亞鐵氰化銅多步驟電鍍電極 32 3.4.4 亞鐵氰化銅與普魯士藍共電鍍 32 3.4.5 一步驟亞鐵氰化銅電鍍 33 3.5 亞鐵氰化銅修飾電極性能分析 35 3.5.1 電極穩定性分析 35 3.5.2 掃描式電子顯微鏡表面形態學分析 35 3.5.3 X射線光電子能譜分析 35 3.6 感測表現分析 36 3.6.1 催化效果驗證 36 3.6.2 伏安式感測之選擇性分析 36 3.6.3 伏安式感測愈創木酚之靈敏度分析 37 3.6.4 伏安式愈創木酚感測偵測範圍分析 37 3.6.5 電極毒化現象探討 37 3.7 亞鐵氰化銅對於愈創木酚之感測原理分析 38 3.7.1 反應機制探討 38 3.7.2 反應速率決定步驟探討 38 第四章 結果與討論 39 4.1 可見光光譜分析鐵氰化物之催化效果 39 4.2 初步修飾於玻璃碳電極之催化效果 42 4.2.1 多步驟修飾之亞鐵氰化銅電氧化醛類之效果驗證 42 4.2.2 導電高分子包埋之亞鐵氰化銅電極於香草醛之電氧化感測 43 4.3 普魯士藍類似物修飾電極製程方法探討 45 4.3.1 多步驟電鍍亞鐵氰化銅 45 4.3.2 普魯士藍及亞鐵氰化銅共電鍍 52 4.3.3 一步驟亞鐵氰化銅電鍍 55 4.4 一步驟電鍍亞鐵氰化銅參數優化 58 4.4.1 調控製程鍍液之pH值 58 4.4.2 調控鍍液鉀離子含量比較 62 4.4.3 調控電鍍電位比較 67 4.4.4 小結 71 4.5 亞鐵氰化銅電極於電催化愈創木酚氧化之效果驗證 75 4.6 感測表現分析 76 4.6.1 亞鐵氰化銅應用於伏安式愈創木酚感測之選擇性 76 4.6.2 感測靈敏度與偵測下限 81 4.6.3 掃描速率對於感測表現之比較 83 4.6.4 感測電極之毒化現象 85 4.6.5 實際咖啡樣品應用 87 4.7 亞鐵氰化銅對愈創木酚之氧化感測機制探討 88 4.7.1 反應機制探討 88 4.7.2 愈創木酚氧化反應之速率決定步驟探討 90 第五章 結論與未來展望 93 5.1 結論 93 5.2 未來展望 94 參考文獻 95 附錄 106 | - |
dc.language.iso | zh_TW | - |
dc.title | 亞鐵氰化銅修飾電極於伏安式愈創木酚感測之研究 | zh_TW |
dc.title | Study of Copper Hexacyanoferrate Modified Electrodes for Voltammetric Guaiacol Determination | en |
dc.type | Thesis | - |
dc.date.schoolyear | 111-2 | - |
dc.description.degree | 碩士 | - |
dc.contributor.oralexamcommittee | 何國川;陳世芳;丁健芳 | zh_TW |
dc.contributor.oralexamcommittee | Kuo-Chuan Ho;Shih-Fang Chen;Chien-Fang Ding | en |
dc.subject.keyword | 亞鐵氰化銅,普魯士藍類似物,銦錫氧化物電極,愈創木酚,伏安式感測, | zh_TW |
dc.subject.keyword | copper hexacyanoferrate,Prussian blue analogues,indium tin oxide electrode,guaiacol,voltametric sensor, | en |
dc.relation.page | 112 | - |
dc.identifier.doi | 10.6342/NTU202303455 | - |
dc.rights.note | 同意授權(限校園內公開) | - |
dc.date.accepted | 2023-08-11 | - |
dc.contributor.author-college | 生物資源暨農學院 | - |
dc.contributor.author-dept | 生物機電工程學系 | - |
顯示於系所單位: | 生物機電工程學系 |
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