摘要
采用共沉淀法制备Mg-Al-LDHs,并以Mg-Al-LDHs为前体,采用返混沉淀法进行插层组装合成马来酸根离子柱撑水滑石。采用傅里叶红外光谱、X射线衍射、差热分析对其进行了表征。结果表明,马来酸根离子可以插入Mg-Al水滑石层间,其层间距由0.76nm增大到1.10nm,形成具有超分子结构的马来酸根柱撑水滑石,达到纳米尺寸;给出了分子结构模型;其热稳定性能提高。
Mg-AI Layered Double Hydroxides （Mg-A1-LDHs） have unique structural memory effect. Used it as front body, maleate anions were inserted into layers by back mixing precipitation method. The maleic acid anions column pillared hydrotalcites were synthesized. The samples prepared were characterized by X-Ray Diffraction （XRD）, Fourier transform infrared （FTIR） and Differential Thermal Analysis （DTA）. The resuhs show that the initial interlayer carbonate ions can be completely replaced by the maleic acid anions under controlled condition. The expansion of the inter layer spacing from 0.76 nm to 1.10 nm, with nanoscale supramolecular structure. As can be seen from FTIR and XRD, maleic acid anions were inserted into the space between layers in spite of action force between layers, held open layers. This generated stronger interaction force with layers. Supermolecular structure of column pillared LDHs of maleic acid anions were weaker interaction force between layers. The object and main body were linked by ion bond, hydrogen bond and van der Waals gravitation and arranged regularly. Inorganic organic composite materials of column pillared with supermolecular structure were assembled. The structure models were presented. Thermal stability was improved. It is 465℃.
出处
《科技导报》
CAS
CSCD
北大核心
2009年第20期65-68,共4页
Science & Technology Review
基金
陕西省教育厅科研基金项目(08JK483)
关键词
纳米
马来酸
柱撑水滑石
超分子
nanometer
maleic acid
pillared hydrotalcites
supramolecular
