不同方法制备水杨酸根插层水滑石

在采用共沉淀法制备出结晶性良好层结构规整的Zn2A l-硝酸根水滑石和Zn2A l-碳酸根水滑石的基础上,分别探讨了以硝酸根型水滑石为前驱体用阴离子直接交换法和以碳酸根型水滑石为前驱体用焙烧复原法制备水杨酸根插层水滑石的方法,并与原位一步合成法制备水杨酸根插层水滑石的方法进行了比较,结果表明,采用上述方法在控制适当的反应条件下均能制备出相应的水杨酸根插层水滑石,但用原位一步合成法制备的样品其结晶性和层状结构明显较好。DTA的结果表明,由于主客体相互作用使水滑石层板和插入阴离子的热稳定性均得到明显改善。

Salicylate-Pillared Hydrotalcites Prepared by Different Methods

In this paper,salicylate-pillared hydrotalcites were synthesized by using of direct anion exchange method,memory effect method and in-situ synthesis method,and a comparison was made for the effects of the synthetic methods on the properties of the synthesized samples.Results showed that with all the methods,salicylate-pillared hydrotalcites be obtained with the samples synthesized by in-situ synthesis method having higher crystallity and better layered structure.DTA results demonstrate that the thermal stabilities of the brucite-like layers and the inserted anion pillars in the salicylate-pillared hydrotalcites were largely improved due to the host-guest interaction.