高等学校化学学报

高等学校化学学报 ›› 2005, Vol. 26 ›› Issue (12): 2327.

• 研究论文 • 上一篇    下一篇

ZnAc2·2H2O在空气中的热分解动力学研究

从长杰1,罗仕婷1,陶友田1,张克立1,2   

  1. 1.武汉大学化学与分子科学学院,武汉430072;2.武汉大学纳米科学和技术研究中心,武汉430072
  • 收稿日期:2004-12-17 出版日期:1905-03-14 发布日期:1905-03-14
  • 通讯作者: 张克立(1944年出生)，男，教授，博士生导师，从事固体化学和材料化学研究.E-mail:klzhang@whu.edu.cn
  • 基金资助:

    国家自然科学基金(批准号：20071026)资助.

Kinetics of Thermal Decomposition of ZnAc2·2H2Oin Air Atmosphere

CONG Chang-Jie1,LUO Shi-Ting1, TAO You-Tian1,ZHANG Ke-Li1,2*   

  1. 1. College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China;
    2. Centre of Nanoscience and Nanotechnology Research, Wuhan University, Wuhan 430072, China
  • Received:2004-12-17 Online:1905-03-14 Published:1905-03-14
  • Contact: ZHANG Ke-Li;E-mail:klzhang@whu.edu.cn

摘要：

用TG/DTA,DSC和XRD技术研究了固态物质ZnAc2·2H2O在空气中的热分解过程.结果表明,ZnAc2·2H2O在空气中发生两步分解,其失重率与理论计算失重率相符.XRD结果表明,ZnAc2·2H2O分解的最终产物为ZnO.用Friedman法和Flynn-Wall-Ozawa(FWO)法求得分解过程的活化能E,并通过多元线性回归方法给出了可能的机理函数.ZnAc2·2H2O在空气中两步分解的活化能分别为119.82和66.82kJ／mol.

关键词: TG/DTG/DTA;DSC;热分解;机理;动力学, TG/DTG/DTA, DSC, 热分解, 机理, 动力学

Abstract:

The thermal decomposition processes occurring in the solid state ZnAc2·2H2Owere studied in air atmosphere by using TG-DTG/DTA, DSC and XRD techniques. TG-DTG/DTA, DSC curves show that the decomposition proceeded through two well-defined steps in air atmosphore. Mass loss of the thermal decomposition of ZnAc2·2H2O is in good agreement with the theoretical mass loss. XRD shows that the final product of the thermal decomposition was ZnO. The activation energies were calculated through the Friedman and Flynn-Wall-Ozawa(FWO) methods, and the possible conversion functions were estimated through the multiple-linear regression method. The activation energies for the two decomposition reactions of ZnAc2·2H2Owere 119.82 and 66.82 kJ／mol, respectively.

Key words: TG/DTG/DTA; DSC; Thermal decomposition; Mechanism; Kinetics, TG/DTG/DTA, DSC, Thermal decomposition, Mechanism, Kinetics

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