Acta Phys. -Chim. Sin. ›› 2003, Vol. 19 ›› Issue (04): 315-319.doi: 10.3866/PKU.WHXB20030407

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Kinetics of Formation of ZnSe Nanocrystals under Linear Temperature Increase Condition

Li Huan-Yong;Hu Rong-Zu;Zhang Hong;Jie Wan-Qi   

  1. State key laboratory of Solidification Processing, Northwest Polytechnical University, Xi′an 710072;Chemistry Department of Northwest University, Xi′an 710069
  • Received:2002-07-17 Revised:2002-10-14 Published:2003-04-15
  • Contact: Li Huan-Yong

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.

Key words: ZnSe nanocrystals, Process of ZnSe formation, Thermoanalysis kinetics,  TG-DTG