English  |  正體中文  |  简体中文  |  Items with full text/Total items : 74010/74010 (100%)
Visitors : 24087567      Online Users : 497
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.
Scope Tips:
  • please add "double quotation mark" for query phrases to get precise results
  • please goto advance search for comprehansive author search
  • Adv. Search
    HomeLoginUploadHelpAboutAdminister Goto mobile version

    Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/68183

    Title: 水熱合成鋅釩磷酸鹽及其結構與性質研究;Hydrothermal Synthesis, Crystal Structures and Properties of Zinc Vanadium Phosphates
    Authors: 鍾鎮鴻;Chung,Chen-hung
    Contributors: 化學學系
    Keywords: 水熱合成法;Hydrothermal Synthesis
    Date: 2015-07-30
    Issue Date: 2015-09-23 10:51:03 (UTC+8)
    Publisher: 國立中央大學
    Abstract: 本論文利用中溫水熱合成法合成出兩個鋅釩磷酸鹽的化合物
    Zn(VO)2(PO4)2(H2O)4 (A1)以及[(VVO)(VIVO)3Zn2(OH)(PO4)4(H2O)7]‧
    H2O (A2)。以上化合物均能獲得單晶產物,利用單晶X 光繞射方法收
    集數據後進行結構解析,並以粉末X 光圖譜與理論圖譜做比對以確
    定樣品純度後,用X 光光電子能譜儀測量A2 之釩金屬價數及熱重分
    析儀(TGA)來分析A2 的水分子裂解現象,最後使用超導量子干涉磁
    量儀(SQUID)分別來量測A1 及A2 磁性現象。
    在反應條件中,A1 與A2 的起始物比例完全相同,而卻在不同的反
    應溫度及恆溫時間下可以得到兩種不同的產物,其中A1 為純V(IV)
    產物,而A2 為V(IV)以及V(V)的混價化合物,推測可能跟所加入的
    還原劑鋅粒的反應程度有很大的關係。;Two Zinc Vanadium Phosphates, Zn(VO)2(PO4)2(H2O)4 (A1) and [(VVO)(VIVO)3Zn2(OH)(PO4)4(H2O)7]‧H2O (A2), were synthesized under mild hydrothermal conditions. Both of these two structures were determined by single-crystal X-ray diffraction. The purity of each compound was confirmed by powder X-ray diffraction. These compounds were further characterized by TGA, SQUID, XPS.
    The reaction agent ratio of A1 and A2 are same, but reaction temperature are different, A1 is a Vanadium(IV) compound, A2 is a mixed-valance compound, the reducing agent zinc maybe play a big role in this reactions to show this results. Magnetic Susceptibility also can proof A2 is a mixed-valance vanadium compound.
    A1 crystal data: Zn(VO)2(PO4)2(H2O)4, tetragonal, I4/m(No. 87), a = 6.2518(2) Å, c = 13.4642(6) Å, V = 526.25(3) Å3, Z = 2, R1 = 0.0481 and wR2 = 0.1144.
    A2 crystal data: [(VVO)(VIVO)3Zn2(OH)(PO4)4(H2O)7]‧H2O, monoclinic, I4/m(No. 87), a = 12.6432(6) Å, b = 12.6408(6) Å, c = 13.5881(6) Å, =108.627(2)°, V = 2057.90(17) Å3, Z = 4, R1 = 0.0202 and wR2 = 0.0570.
    Appears in Collections:[化學研究所] 博碩士論文

    Files in This Item:

    File Description SizeFormat

    All items in NCUIR are protected by copyright, with all rights reserved.

    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 ©   - Feedback  - 隱私權政策聲明