中大機構典藏-NCU Institutional Repository-提供博碩士論文、考古題、期刊論文、研究計畫等下載:Item 987654321/6435
English  |  正體中文  |  简体中文  |  全文笔数/总笔数 : 70585/70585 (100%)
造访人次 : 23152429      在线人数 : 513
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.
搜寻范围 查询小技巧:
  • 您可在西文检索词汇前后加上"双引号",以获取较精准的检索结果
  • 若欲以作者姓名搜寻,建议至进阶搜寻限定作者字段,可获得较完整数据
  • 进阶搜寻


    jsp.display-item.identifier=請使用永久網址來引用或連結此文件: http://ir.lib.ncu.edu.tw/handle/987654321/6435


    题名: 具苯環及硫基官能基之中孔洞材料 SBA-1 的合成與鑑定;Synthesis and Characterization of Cubic Mesoporous Silicas SBA-1 with Phenyl and Thiol Functionalities
    作者: 廖家秀;Chia-Hsiu Liao
    贡献者: 化學研究所
    关键词: SBA-1;中孔洞材料;硫醇;苯環;mesoporous;SBA-1;phenyl;thiol
    日期: 2008-06-25
    上传时间: 2009-09-22 10:19:29 (UTC+8)
    出版者: 國立中央大學圖書館
    摘要: 本論文分為二個部份,第一部份是利用直接合成法,以PhTES (Phenyltriethoxysilane) 和 TEOS (Tetraethtyl orthosilicate) 為共同矽源,在酸性條件下合成具有苯環官能基的中孔洞材 SBA-1。研究發現苯環官能基化的中孔洞材料SBA-1,其PhTES含量最大可達33 mole % ,且結構仍相當良好。研究發現有效控制反應溫度、組成、界面活性劑總類對於合成具有規則立方排列、高表面積的中孔洞材料 Ph-SBA-1 是很重要的因素。利用固態核磁共振儀及其二維的 HETCOR、Exchange 技術來探測矽酸鹽類之間以及與界面活性劑在空間中的相對關係,由二維的13C{1H} HETCOR 和 1H-1H exchange 研究發現Ph-SBA-1 材料中的苯環官能基,和界面活性劑 CTMABr 的頭基部分 -N-(CH3)3 較鄰近,由二維的 29Si{1H} HETCOR 研究可得知植入於中孔洞材料中的苯環官能基分怖情形,是苯環官能基 (T group) 會和孔洞矽壁中的 Q4 group 較 Q3 group 鄰近。 第二部份為中孔洞材料 SBA-1 的雙官能基化的研究,是利用直接合成法,以MPTMS ((3-Mercaptopropyl)trimethoxysilane) 和 BTEB (1,4-Bis(triethoxysilyl) benzene) 為共同矽源,合成具有苯環官能基和硫醇官能基的中孔洞材料 SH-BTEB-SBA-1。利用 XRD、等溫氮氣吸脫附及 13C 、29Si MAS NMR 來研究有機官能基對孔洞結構的影響。將 SH-BTEB-SBA-1 應用於吸附金屬上,發現對於汞、銅、銀離子都有相當良好的吸附效果,並發現吸附金屬後所測得的13C MAS NMR 光譜有明顯的變化,這提供了一種直接檢測固態樣品中金屬的方法。 The thesis is divided into two parts. In part one, well-ordered mesoporous silicas SBA-1 (cubic Pm3n symmetry) functionalized with phenyl groups have been synthesized via co-condensation of tetraethoxysilane (TEOS) and phenyltriethoxysilane (PhTES) under acidic conditions. The phenyl-containing units are incorporated quantitatively and reach a maximum PhTES loading up to 33 mol% without a significant degradation of the structural ordering of the Pm3n mesophase. The synthesis parameters such as temperature, type of surfactant, and synthesis composition have been systematically investigated as a function of PhTES contents. A combination of multinuclear (1H、13C、29Si) solid-state NMR and two-dimensional (2D) NMR correlation techniques such as 13C{1H} and 29Si{1H} HETCOR (heteronuclear correlation) and 1H-1H exchange NMR has been used to establish framework locations of phenyl functional groups that are incorporated in the mesoporous structure and their interactions with the surfactant molecules. 2D 13C{1H} HETCOR NMR experiments reveal that the phenyl moieties are in close spatial proximity to the trimethylammonium headgroups of the cationic surfactant species. 2D 29Si{1H} HETCOR NMR experiments reveal that the phenyl moieties are in close spatial proximity to the Q4 group than to the Q3 group. In part two, well-ordered mesoporous silicas SBA-1 (cubic Pm3n symmetry) bifunctionalized with phenyl and thiol groups have been synthesized via co-condensation of (1,4-Bis(triethoxysilyl) benzene) (BTEB) and ((3-Mercaptopropyl)trimethoxysilane) (MPTMS) under acidic conditions. The materials obtained were characterized by a variety of techniques including powder X-ray diffraction (XRD), nitrogen sorption measurements, 13C and 29Si magic angle spinning (MAS).The SH-BTEB-SBA-1 is a good candidate for being adsorbed metal ion (mercury ,copper ,and silver). Moreover, the 13C signal of the carbon atom adjacent to SH groups are senstitive to metal ion binding. We demonstrate that 13C CPMAS NMR is a good sensor for detecting the metal ion binding with SH groups.
    显示于类别:[化學研究所] 博碩士論文

    文件中的档案:

    档案 大小格式浏览次数


    在NCUIR中所有的数据项都受到原著作权保护.

    社群 sharing

    ::: Copyright National Central University. | 國立中央大學圖書館版權所有 | 收藏本站 | 設為首頁 | 最佳瀏覽畫面: 1024*768 | 建站日期:8-24-2009 :::
    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - 回馈  - 隱私權政策聲明