Journal
THERMOCHIMICA ACTA
Volume 370, Issue 1-2, Pages 99-104Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/S0040-6031(00)00780-2
Keywords
hydrotalcite; layered double hydroxides; thermal properties; magnesium vanadium oxides
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A study is reported on the thermal evolution of Mg, V layered double hydroxides with interlayer carbonate anions and different Mg/V molar ratios (from 1 to 4). Decomposition in O-2 occurs at lower temperature than that in N-2; the stability of the layered structure decreases as the V content increases. Oxidation of layer V3+ cations occurs in the same temperature range as dehydroxylation and decarbonation. The nature of the crystalline phases formed upon calcination at high temperatures strongly depends on the Mg/V molar ratio in the initial solid. (C) 2001 Elsevier Science B.V. All rights reserved.
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