Synthesis, Properties and Characterisation of Manganeous Layered Double Hydroxides Using In Situ X-Ray Techniques

摘要

Synthetic manganeous Layered Double Hydroxides of the Hydrotalcite- and Shigaite-type were prepared by the coprecipitation method. The thermal behaviour of two compounds, [Mn{sub}6Al{sub}3(OH){sub}18] [(SO{sub}4){sub}2Na·12H{sub}2O] and [Mn{sub}6Al{sub}3(OH){sub}18] [Cl·4H{sub}2O] was investigated by several experimental techniques. Thermal analysis and in-situ X-ray diffractometry show several dehydration stages of the synthesis products in the temperature range of 25 < T < 170°C followed by decomposition at temperatures above 200°C.