In this work, an efficient base catalyst, amine-functionalized MgAl LDH nanosheet, was prepared by grafting aminopropyltriethoxysilane (APTS) on MgAl LDH nanosheets via the condensation between the ethyoxyl groups of APTS and the hydroxyl groups on the surface of MgAl LDH nanosheets. The physical-chemical properties of the prepared samples were characterized by XRD, FT-IR, N₂ adsorption-desorption, TG, SEM, CO₂ adsorption and catalytic reactions. The results showed that APTS could be successfully grafted on MgAl LDH nanosheets due to their high surface area and more available and accessible −OH groups. The prepared amine-functionalized MgAl LDH nanosheets showed excellent catalytic performance in Knoevenagel condensation due to the synergistic effects among the grafted amine groups, the LDH nanosheets and reaction substrates. Moreover, the prepared catalysts can be used to catalyze various Knoevenagel condensations, and have well reusability. This method supplies an effective way to fabricate novel base catalysts based on LDHs.

在这项工作中，通过将氨基丙基三乙氧基硅烷（APTS）通过APTS的乙氧基与MgAl LDH纳米片表面上的羟基之间的缩合接枝到MgAl LDH纳米片上，制备了一种有效的碱催化剂，胺官能化的MgAl LDH纳米片。通过XRD，FT-IR，N ₂吸附-脱附，TG，SEM，CO ₂表征了所制备样品的理化性质。吸附和催化反应。结果表明，由于APTS具有高的表面积和更多的可用和可及的-OH基团，因此可以成功地接枝到MgAl LDH纳米片上。制备的胺官能化的MgAl LDH纳米片由于接枝的胺基，LDH纳米片和反应底物之间的协同作用，在Knoevenagel缩合反应中表现出优异的催化性能。而且，所制备的催化剂可用于催化各种Knoevenagel缩合，并且具有良好的可重复使用性。该方法提供了一种有效的方法来制备基于LDH的新型碱催化剂。