分子模版技術(MIP)結合溶膠凝膠法(Sol-Gel)製備高選擇性和快速反應時間的銅(Cu(II))離子

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Title:	分子模版技術(MIP)結合溶膠凝膠法(Sol-Gel)製備高選擇性和快速反應時間的銅(Cu(II))離子
Authors:	洪方傑
Contributors:	化學系
Keywords:	薄膜 Thin film 溶膠凝膠 Sol-gel growth 電化學 Electrical characterization 金屬離子感測器 ion sensor
Date:	2012
Issue Date:	2012-10-11 10:40:54 (UTC+8)
Abstract:	本研究使用3-胺丙基三甲氧矽烷(3-aminopropyltrimethoxysilane)為作用單體、銅離子(II)為模版、四乙氧基矽烷(tetraethoxysilane)為交聯劑加入酸和鹼催化行共水解反應再運用分子模版技術(MIP)結合溶膠凝膠法(Sol-Gel)製備銅(Cu(II))離子石英晶體微天平(QCM)晶片感測器，並利用掃描式電子顯微鏡(SEM)、電化學阻抗頻譜分析儀(EIS)、循環伏安法(CV)、傅立葉轉換紅外線光譜儀(FTIR)分析其薄膜表面之特性。　　從顯微結構中觀察發現，酸催化系統所製作的薄膜，具有較強的機械強度。將製作出來的銅離子分子模版技術溶膠凝膠薄膜感測元件利用流動注射分析法(FIA)進行感度、選擇性、反應時間之探討。TEOS/APTS莫耳比10的銅離子分子模版技術溶膠凝膠薄膜感測元件具有良好的選擇性與短的反應時間。　　Cu(II)-molecularly imprinted sol-gel films (Cu(II)-MISGF), coated on a quartz crystal microbalance (QCM) chip, were fabricated using a sol-gel procedure. Co-hydrolysis and co-condensation of Cu(II) (templates), 3-aminopropyltrimethoxysilane (APTS, functional monomer) and tetraethoxysilane (TEOS, cross-linking agent) were performed with acid and base catalysis. The properties of the Cu(II)-MISGF were characterized by Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and the electrochemical methods of cyclic voltammetry (CV). Microstructural observations revealed that the acid-catalyzed system yielded more mechanically stable thin films. A combined Cu(II)-MISGF-QCM with flow injection analysis (FIA) method was utilized to investigate the sensing performance of the Cu(II)-MISGF, with special emphasis on the most important properties of sensitivity, selectivity and response time. The Cu(II)-MISGF-QCM sensor, at a TEOS/APTS molar ratio of 10, exhibited excellent selectivity and rapidly responded to Cu(II) ions.
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