两种方法合成NiAl-LDH/MMT复合材料  

The synthesis of NiAl-LDH/montmorillonite composites by two methods

作　　者：周景龙[1] 谢鲜梅[1] 吴旭[1] 安霞[1] 马小茜[1] 

机构地区：[1]太原理工大学化学化工学院,山西太原030024

出　　处：《功能材料》2013年第20期3035-3039,共5页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(50872086);山西省青年科技研究基金资助项目(2012021006-3)

摘　　要：为获得一种分散性好、载体酸性易调变和高热稳定性的新型催化材料,该研究采用插层法和原位法制备NiAl-LDH/MMT复合材料,并借助XRD、IR、TG-DTA、BET、SEM等手段对合成材料进行了表征。插层法是先将NiAl-LDH进行剥离形成带正电荷的无机层片,然后与蒙脱土进行插层复合;原位法是先将蒙脱土的层间阳离子Na+交换为Ni 2+和Al 3+,然后加碱使Ni 2+、Al 3+在蒙脱土层间反应生成NiAl-LDH。结果表明,两种方法均合成出了晶型良好的复合材料,形成单层LDH层板与单层蒙脱土层板交替排列结构;复合材料的LDH层板羟基脱除温度达525℃。To obtain a new catalytic materials with good dispersion, easy acid modulation of carrier and high thermal stability, the composites of NiAl-LDH/MMT was prepared respectively by intercalation method and in situ method. The compounds was characterized by XRD, IR, TG-DTA,BET and SEM measurement. The in- tercalation method was as follows. First, exfoliated the NiA1-LDH to get the LDH layers, then inserted the ex foliated NiAl-LDH layers into the interlayers of MMT. The in situ method was first to change the Na-MMT in- to NiAl-MMT, then add alkali into NiAl-MMT fluid to form a composite. The results showed that both of the two methods could prepared composites with good crystallization. The LDH layers and MMT layers were layer by layer staggered alternately. The LDH layer＇s hydroxyl removal temperature of the composites reached 525 ℃.

关 键 词：蒙脱土 镍铝类水滑石 插层 原位 复合材料 

分 类 号：TB332[一般工业技术—材料科学与工程]