| 线性升温条件下纳米ZnSe的生成动力学 |
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| 引用本文： | 李焕勇,胡荣祖,张红,介万奇. 线性升温条件下纳米ZnSe的生成动力学[J]. 物理化学学报, 2003, 19(4): 315-319. DOI: 10.3866/PKU.WHXB20030407 |
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| 作者姓名： | 李焕勇 胡荣祖 张红 介万奇 |
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| 作者单位： | State key laboratory of Solidification Processing, Northwest Polytechnical University, Xi′an 710072;Chemistry Department of Northwest University, Xi′an 710069 |
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| 基金项目： | 杰出青年基金(59825109)，陕西省自然科学基金(No.20011-108)资助项目~~ |
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| 摘 要： | 用非等温TG-DTG技术,在5.0、10.0、15.0和20.0 K•min－1 4个不同线性升温条件下,研究了从配合物ZnSe(C2H8N2)制备纳米ZnSe的过程动力学.结果表明: 该过程为三维扩散机理；机理函数为反Jander方程, f(α)＝ ，G(α)＝ ；表观活化能E=209.61 kJ•mol－1,指前因子A=1015.7 s－1,动力学方程为 ,并用结果解释了实验现象.初次报导了纳米ZnSe在420 ℃左右氧化为粒度低于40 nm的纳米ZnO.
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| 关 键 词： | 纳米ZnSe 生成过程 热分析动力学 TG-DTG |
| 收稿时间： | 2002-07-17 |
| 修稿时间： | 2002-07-17 |
Kinetics of Formation of ZnSe Nanocrystals under Linear Temperature Increase Condition |
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| Li Huan Yong, Hu Rong Zu Zhang Hong Jie Wan Qi. Kinetics of Formation of ZnSe Nanocrystals under Linear Temperature Increase Condition[J]. Acta Physico-Chimica Sinica, 2003, 19(4): 315-319. DOI: 10.3866/PKU.WHXB20030407 |
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| Authors: | Li Huan Yong Hu Rong Zu Zhang Hong Jie Wan Qi |
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| Affiliation: | State key laboratory of Solidification Processing, Northwest Polytechnical University, Xi′an 710072;Chemistry Department of Northwest University, Xi′an 710069 |
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| Abstract: | The kinetics of formation of ZnSe nanocrystals from the complex ZnSe (C2H8N2) has been investigated by means of non-isothermal TG-DTG at various heating rates of 5.0,10.0,15.0 and 20.0 ℃•min－1.The results show that the formation of ZnSe nanocrystals was controlled by three-dimension diffusion. The most probable kinetic function in differential form, and in integral form, the apparent activation energy (E) and the pre-exponential constant (A) of the process are f (α)＝ ，G(α)＝ ,209.61 kJ•mol－1 and 1015.7 s－1, respectively. The kinetics equation is .The calculated results are in accordance with the experiments. ZnO nanocrystal with less than 40 nm sizes has also been obtained from ZnSe nanocrystals. |
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| Keywords: | ZnSe nanocrystals Process of ZnSe formation Thermoanalysis kinetics TG DTG |
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