规则镁铝水滑石超分子的组装及其结构分析  

Supramolecular Assembly and Structural Analysis of Regular Nanocrystalline Mg-Al Hydrotalcite

作　　者：吴健松[1] 肖应凯[2] 罗肖丽[1] 祝桂莲[1] 丁玲弟[3] 陈浪英[1] 

机构地区：[1]湛江师范学院化学科学与技术学院广东高校新材料工程技术开发中心,湛江524048 [2]中国科学院青海盐湖研究所中国科学院盐湖资源与化学重点实验室,西宁810008 [3]湛江师范学院物理科学与技术学院,湛江524048

出　　处：《化学通报》2009年第11期1003-1007,共5页Chemistry

基　　金：国家自然科学基金项目(40573013);湛江市2007年科技攻关项目(2007C09018);湛江师范学院自然科学研究基金项目(L0707)资助

摘　　要：以MgCl2.6H2O、AlCl3.6H2O、Na2CO3为原料,采用乙二醇-水热法组装了超分子结构镁铝水滑石,考察了乙二醇-水热法对水滑石晶形、结构、分散性、规整性的影响。样品用XRD、SEM、TEM、IR、TG-DTA、N2吸附-解吸进行了表征。结果表明,在水热反应体系中加入15(vol)%的乙二醇,于T=180℃反应16h可获得晶形好、板层结构显著、规整性好、分散性好的优质镁铝水滑石,谢乐公式估算粒子粒径为36nm左右。A regular nanocrystalline supramolecular Mg-AI hydrotalcite was assembled via glycol hydrothermal using MgCl2.6H2O、AlCl3.6H2O、Na2CO3 as starting materials and sodium hydroxide as precipitator. Hydrotalcite samples were characterized by XRD, SEM, TEM, IR, TG-DTA and BET-N2 surface area measurements and the influence of glycol- hydrothermal on characters of the sample was investigated. The Mg-A1 hydrotaleite with well-defined shape, obvious intercalated structure, well regular quality and well-dispersing capability can be obtained under the conditions at glycol volume ratio 15 %, hydrothermal temperature 180~ and reaction time 16h. The hydrotaleite obtained was well crystallized and had morphology of a homogeneous and hexagonal sheet, the thickness measured of each hexagon in the hydrotalcite was about 36 nm which was consistent with the value estimated by Seherrer equation.

关 键 词：乙二醇 水热法 镁铝水滑石 组装 

分 类 号：O611.3[理学—无机化学]