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Kinetics of Thermal Decomposition of Zn 1– x Mn x C 2 O 4 ·2H 2 O in Air
Author(s) -
Cong ChangJie,
Hong JianHe,
Luo ShiTing,
Tao HaiBo,
Zhang KeLi
Publication year - 2006
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.200690096
Subject(s) - chemistry , thermal decomposition , decomposition , analytical chemistry (journal) , kinetics , crystallography , physics , organic chemistry , chromatography , quantum mechanics
Thermal decomposition processes taking place in solid state complex of Zn 1− x Mn x C 2 O 4 ·2H 2 O have been investigated in air using TG‐DTG/DTA, XRD and TEM techniques. TG‐DTG/DTA curves showed that the decomposition proceeded through two well‐defined steps with DTA peaks closely to correspond to the weight loss. XRD and TEM showed that the final decomposition product of Zn 1– x Mn x C 2 O 4 ·2H 2 O was Zn 1– x Mn x O and most of the individual particles were of size 10–13 nm. Kinetics analysis of Zn 1– x Mn x C 2 O 4 ·2H 2 O decomposition steps was performed under nonisothermal conditions, the activation energies were estimated by Friedman and Flynn‐Wall‐Ozawa (FWO) methods, and the most probable kinetic model has been estimated with multiple linear regression method. The activation energies for the two decomposition steps of Zn 1– x Mn x C 2 O 4 ·2H 2 O were 155.7513 and 215.9397 kJ/mol, respectively.