Thermal Behavior of Zn(Thr)SO4·H2O

Chemical Research in Chinese Universities ›› 2003, Vol. 19 ›› Issue (2): 222-226.

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Thermal Behavior of Zn(Thr)SO₄·H₂O

LI Huan-yong¹, GUO Peng-jiang^1,2, HU Rong-zu¹, GAO Sheng-li¹, SHI Qi-zhen¹

1. Department of Chemistry, Northwest University, Shaanxi Key Laboratory of Physic-Chemistry, Xi′an 710069, P. R. China;
2. Department of Chemistry, Northwest University, Shaanxi Key Laboratory of Physic-Chemistry, Xi′an 710069, P. R. China

Received:2002-05-09 Online:2003-04-24 Published:2011-08-06
Supported by:
Supported by the National Natural Science Foundation of China(No.29871032 and 20171036) and the Educational Special Foundation of Shaanxi Province(No.01H08).

Abstract

Abstract: Solid complex Zn(Thr)SO₄·H₂O was prepared in a water-acetone system. Under linearly increasing temperature, the non-isothermal kinetics and the decomposition mechanism of Zn(Thr)SO₄·H₂O were studied by means of thermogravimetry and IR spectrometry. The thermal decomposition processes of the complex could be divided into three stages. The non-isothermal decomposition mechanism and the kinetics parameters of the ligand-lost process were obtained from an analysis to the TG-DTG curves at various heating rates of 5.0, 10.0, 15.0 and 20.0 K/min by two integral and three differential methods. The results show that the random nucleation and the subsequent growth mechanism (n=3/2) controlled the ligand-lost process, the corresponding activation energy E and pre-exponential constant A are 139.96 kJ/mol and 10^11.32s^-1, respectively. The empirical kinetics model equation was constructed.

Key words: Kinetics, Mechanism, Thermal decomposition, Solid complex Zn(Thr)SO₄·H_2O

LI Huan-yong, GUO Peng-jiang, HU Rong-zu, GAO Sheng-li, SHI Qi-zhen. Thermal Behavior of Zn(Thr)SO₄·H₂O[J]. Chemical Research in Chinese Universities, 2003, 19(2): 222-226.

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Thermal Behavior of Zn(Thr)SO₄·H₂O

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