摘要
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°C·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) = {3/2(1 + α)2/3[(1 + α)1/3 - 1]-1}, G(α) = [(1 + α)1/3 - 1]2, 209.61 kJ·mol-1 and 1015.7 s-1, respectively. The kinetics equation is dα/dt = 1015.7{3/2(1 + α)2/3[(1 + α)1/3 - 1]-1}exp(-25211.7/T) The calculated results are in accordance with the experiments. ZnO nanocrystal with less than 40 nm size has also been obtained from ZnSe nanocrystals.
源语言 | 英语 |
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页(从-至) | 315-319 |
页数 | 5 |
期刊 | Wuli Huaxue Xuebao/ Acta Physico - Chimica Sinica |
卷 | 19 |
期 | 4 |
出版状态 | 已出版 - 1 4月 2003 |