DECAVANADATE ION-PILLARED HYDROTALCITE - SPECTROSCOPIC STUDIES OF THE THERMAL-DECOMPOSITION PROCESS

被引:66
作者
TWU, J
DUTTA, PK
机构
[1] Department of Chemistry, The Ohio State University, Columbus, OH 43210
基金
美国国家科学基金会;
关键词
D O I
10.1016/0021-9517(90)90196-Q
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
In this study, we have focused on the thermal decomposition of the material generated by ion-exchange of decavanadate ions into the layers of a magnesium aluminum hydroxide hydrotalcite-like compound, over the temperature range from ambient to 650°C. Using powder diffraction data and Raman and XANES spectroscopy, it was found that the intercalated decavanadate ions transform into cyclic and chain-like metavanadate species at temperatures between 160-350°C. The metal hydroxide layer structure remains intact until 350°C. Reaction between the metal oxide and the metavanadate species to form magnesium vanadates is only observed for samples heated in excess of 450°C. © 1990.
引用
收藏
页码:503 / 510
页数:8
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