NDLI: Physico-chemical characterization of thermal decomposition course in zinc nitrate-copper nitrate hexahydrates

Content Provider	Springer Nature Link
Author	Nikolic, R. Zec, S. Maksimovic, V. Mentus, S.
Copyright Year	2006
Abstract	This study reports experimental investigations by non-isothermal TG/DSC analysis of Zn(NO$_{3}$)$_{2}$·4H$_{2}$O, Cu(NO$_{3}$)$_{2}$·4H$_{2}$O and their mixtures of known compositions in the temperature range 30–1200°C. Solid/liquid transitions in the sealed samples of the hexahydrate salts and their mixtures were also studied by DSC in the temperature range 0–60°C. The mixture with composition 0.85Zn(NO$_{3}$)$_{2}$·6H$_{2}$O+0.15Cu(NO$_{3}$)$_{2}$·6H$_{2}$O showed single melting peak at 29°C. This mixture was chosen for detailed studies. Melting temperature and heat of fusion of single salt hexahydrates and of the mixture were calculated from DSC endotherms.The different stages in the thermal decomposition processes have been established. The intermediate and the final solid products of the thermal decomposition were analyzed by XRD. The scheme and the decomposition temperature depended on the composition of the starting material. The final decomposition products were CuO (monoclinic), Cu$_{2}$O (cubic), ZnO (hexagonal) and their mixtures with the defined crystalline structures. Possible influence of the addition of CuCl$_{2}$·2H$_{2}$O into the mixture 0.85Zn(NO$_{3}$)$_{2}$·6H$_{2}$O+0.15Cu(NO$_{3}$)$_{2}$·6H$_{2}$O and a gel combustion technique of the precursor preparation, on the composition and morphology of the solid decomposition products, were also studied. The gel combustion technique, using citric acid added to a mixture of 0.85Zn(NO$_{3}$)$_{2}$·6H$_{2}$O+0.15Cu(NO$_{3}$)$_{2}$·6H$_{2}$O, was applied in an attempt to obtain mixed Zn/Cu oxides of a particular mole ratio. The morphology of the solid decomposition products was examined by SEM.
Starting Page	423
Ending Page	428
Page Count	6
File Format	PDF
ISSN	13886150
Journal	Journal of thermal analysis
Volume Number	86
Issue Number	2
e-ISSN	15728943
Language	English
Publisher	Kluwer Academic Publishers
Publisher Date	2006-03-20
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	copper nitrate hexahydrate copper oxide thermal decomposition XRD analysis zinc nitrate hexahydrate zinc oxide Inorganic Chemistry Physical Chemistry Polymer Sciences Measurement Science, Instrumentation
Content Type	Text
Resource Type	Article
Subject	Physical and Theoretical Chemistry Condensed Matter Physics

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