Thermal evolution of V(III)-containing layered double hydroxides

被引:10
|
作者
Labajos, FM [1 ]
Sánchez-Montero, MJ [1 ]
Holgado, MJ [1 ]
Rives, V [1 ]
机构
[1] Univ Salamanca, Dept Quim Inorgan, E-37008 Salamanca, Spain
关键词
hydrotalcite; layered double hydroxides; thermal properties; magnesium vanadium oxides;
D O I
10.1016/S0040-6031(00)00780-2
中图分类号
O414.1 [热力学];
学科分类号
摘要
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.
引用
收藏
页码:99 / 104
页数:6
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