The development of adsorbent of offensive odor based on polyamine intercalated layered phosphate

我们发现，多胺，即二乙烯三胺和五乙烯六胺，插入层状磷酸盐吸收大量的气态醛和羧酸。通过XRD和固体核磁共振研究了层状磷酸盐的物理性质和吸附机理。羧酸的吸附增加了层间化合物的层间距。它们的吸附性能与多胺在层间空间的排列和构象密切相关。醛分子在端氨基催化下分解生成甲醇和甲酸。因此，醛的吸附不会改变层间距。羧酸和醛的吸附机理的差异反映在羧酸和醛的吸附机理上，反映在它们的吸附容量上。

We found that polyamines, that is, diethylenetriamine and pentaethylenehexamine, intercalated into layered phosphates absorb considerable amount of gaseous aldehydes and carboxylic acids. The physical properties and adsorption mechanism of layered phosphates were investigated by XRD and solid-state NMR.Carboxylic acids are I intercalated into interlayer spaces by the interaction with terminal amino groups. And the interlayer distance of intercalation compound increases by adsorption of carboxylic acids. The adsorption capabilities of them are closely related with the arrangement and conformation of polyamines in the interlayer space. Aldehyde molecule is decomposed to form methanol and formic acid by the aid of terminal amino group as catalyst. Therefore, there was no change of the interlayer distance by the adsorption of aldehyde. The differences in adsorption mechanism of carboxylic acid and aldehyde reflected in the adsorption mechanisms of carboxylic acid and aldehyde reflected in the adsorption capacities of them.