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Thermal activation of copper oxide based upon the copper hydrotalcites of the type CuxZn6-xCr2(OH)16(CO3).4H2O

By Ray L. Frost and Zhe Ding

Abstract

A combination of DSC and high resolution DTG coupled to a gas evolution mass spectrometer has been used to study the thermal properties of a series of Cu/Zn hydrotalcites of formulae CuxZn6-xAl2(OH)16(CO3).4H2O where x varied from 6 to 0. The effect of increased Zn composition results in the increase of the endotherms and weight loss steps to higher temperatures. Evolved gas mass spectrometry shows that water is lost in a number of steps. The interlayer carbonate anion is lost simultaneously with hydroxyl units. The endotherms and differential weight loss steps were both cation and mole ratio dependent

Topics: 030200 INORGANIC CHEMISTRY, dehydration, dehydroxylation, hydrotalcite, differential scanning calorimetry, high, resolution thermogravimetric analysis
Publisher: Elsevier
Year: 2003
DOI identifier: 10.1016/S0040-6031(03)00194-1
OAI identifier: oai:eprints.qut.edu.au:1019

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