具乙烷官能基和硫醇官能基之中孔洞材料的合成、鑑定與應用

Direct Synthesis, Characterization, and Application of Ethane-Bridged Periodic Mesoporous Organosilicas Functionalized with Mercaptopropyl Groups

趙蓓瑩(Pei-ying Chao)

指導教授 ： 高憲明

國立中央大學/理學院/化學系/碩士(2011年)

摘要

本篇論文主要是使用中性離子界面活性劑 (C2H4O)10C18H38O (Brij-76) 做為模板，將具有乙烷官能基之 PMOs 材料 1,2-bis-(trimethoxysilyl) ethane (BTME) 與具硫醇官能基之 3-mercaptopropyltrimethoxysilane (MPTMS) 作為共同矽源，並在酸性條件下以共聚合的方式來進行合成。除了可以得到規則排列的六角柱狀中孔洞材料外，也可將硫醇官能基的莫耳比例提升至 75%。
另外在重金屬的檢測及定量在區域的環境監控、污水管理，甚至生物演變在近年來雖然利用很多不同儀器的技術進行檢測，但在此將利用硫醇官能基對汞金屬離子進行吸附，並以 ICP-MS 鑑定之。
再者，利用此含硫醇官能基之中孔洞材料做為基板，來對金離子進行吸附後，將其在孔道內還原成大小約為 4 ~ 9 奈米之金奈米顆粒。
最後，利用雙氧水、硝酸做為氧化劑，以後修飾法及一步合成法來將硫醇官能基氧化為磺酸官能基。除了一般氧化方法外，也發現也許可在不需要雙氧水的形況下，利用銅金屬將硫醇官能基轉換為磺酸官能基。

關鍵字

中孔洞 ； 硫醇官能基 ； 乙烷官能基

並列摘要

Ethane-bridged periodic mesoporous organosilicas (PMOs) functionalized with pendant thiol groups have been synthesized via co-condensation of 1,2-bis-(trimethoxysilyl) ethane ((CH3O)3Si-CH2CH2-Si(OCH3)3, BTME) and 3-mercaptopropyltrimethoxysilane ((MeO)3SiCH2CH2CH2SH, MPTMS) using nonionic oligomeric polymer surfactant (C2H4O)10C18H38O (Brij-76) as the template. The materials thus obtained exhibited ordered and uniformed mesopores up to 75 mol % of MPTMS in the initial mixture.
Second, the detection and quantification of heavy metal ions are important in plethora of areas such as environmental monitoring, waste water management, developmental biology, and clinical toxicology. Now, we used ICP-MS as a characterization tools to obtain evidence for the mercury metal ions adsorption.
Third, Gold (Au) nanoparticles of sizes in the range of 4–9 nm dispersed on ordered mesoporous silica were prepared via a one-pot synthesis and post synthesis route in the presence of organosilane mercapto group mesoporous silicas (MPTMS).
Final, used the H2O2 or HNO3 as oxidation agent to change the thiol (-SH) group to sulfonic acid (-SO3H) group. By the way, the conversion of thiol-functionalized mesoporous silicas to sulfonic acid-functionalized mesoporous silicas using Cu2+ without oxidation agent was achieved.

並列關鍵字

Ethylane-bridge ； Mesoporous ； Mercaptopropyl Group

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