| 配合物Zn(Leu)SO4·0.5H2O的合成与热行为(英文) |
| The Preparation and Thermal Behavior of Zn(Leu)SO4·0.5H2O |
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| 摘要: 在水-丙酮溶液中制备了Zn(Leu)SO4·0.5H2O的配合物。通过热重和红外分析,研究了它的热分解机理,可分为三步完成。第一阶段配合物的脱水过程在60～180℃,形成Zn(Leu)SO4,第二阶段,Zn(Leu)SO4进一步分解为Zn(Leu)SO4·9ZnSO4,随后其在728℃完全分解为ZnO。在不同线性升温5.0,10.0,15.0,20.0K·min-1条件下,用两种积分法和三种微分法研究了题目化合物失去配体过程的非等温动力学,相应过程的表观活化能E为133.78kJ·mol-1,指前因子A为108.19s-1,配体失去过程为三维扩散机理控制,并建立了反应过程的动力学方程。 |
| 关键词: 动力学 机理 热分解 配合物Zn(Leu)SO4·0.5H2O |
| 基金项目: |
| Abstract: The solid complex Zn(Leu)SO4·0.5H2O was prepared in water-acetone system. The non-isothermal decom-position of Zn(Leu)SO4·0.5H2O was studied at various heating rates of 5.0,10.0,15.0 and 20.0K·min-1 by TG-DTG and IR. The thermal decomposition processes of the complex can be divided into three stages. For the first stage, the complex was dehydrated from 60 to 185℃ and Zn(Leu)SO4 was formed. And for the second stage, anhydrous Zn(Leu)SO4 was decomposed into Zn(Leu)SO4·9ZnSO4 and finally Zn(Leu)SO4·9ZnSO4 was de-composed completely into ZnO at 728℃. The non-isothermal decomposition mechanism and kinetics parameters of the ligand-losed process were obtained from an analysis of the TG-DTG curves by two integral and three differential methods. The results showed that three dimension diffusion mechanism controlled the ligand-losed process and the apparent activation energy E was 133.78kJ·mol-1 and the pre-exponential constant A was 108.19s-1. The empir-ical kinetics model equation was proposed in this paper. |
| Keywords: kinetics mechanism thermal decomposition the solid complex Zn(Leu)SO4·0.5H2O |
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| 李焕勇,郭鹏江,胡荣祖,高胜利,史启祯.配合物Zn(Leu)SO4·0.5H2O的合成与热行为(英文)[J].无机化学学报,2002,18(10):1003-1008. |
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