不同原料对镁铝水滑石晶体结构及形貌影响的研究  

Influence of different raw materials on the crystal structure and morphology of Mg-Al-CO_3 hydrotalcite

作　　者：周建良[1] 朱健[1] 陈肇雄 邱丽玲 何雪琴[1] 霍艳[1] 

机构地区：[1]中南大学化学化工学院,长沙410083 [2]肇庆市森德利化工实业有限公司,广东肇庆526060

出　　处：《华中师范大学学报（自然科学版）》2010年第2期247-250,共4页Journal of Central China Normal University：Natural Sciences

基　　金：广东省教育部产学研结合项目(2008B090500157);中南大学学位论文创新基金(1114-713360010)

摘　　要：采用双滴定法,分别以氯化镁和氯化铝、硝酸镁和硝酸铝、硫酸镁和硫酸铝为原料合成了镁铝水滑石.用XRD、SEM和FT-IR对样品的晶体结构、形貌和红外特征进行了表征.结果表明:采用上述几组原料均能合成出具有典型水滑石结构的样品,其中以氯化镁和氯化铝为原料合成的水滑石样品晶体结构较好,形貌规整、均一;以硫酸镁和硫酸铝为原料制备的水滑石,存在edge-face效应,XRD和IR分析显示,该样品的晶体表面吸附有SO42-.The preparation of Mg-A1-CO3 hydrotalcite were studied with MgCl2 · 6H2O and AlCl3 · 6H2O,Mg（NO3）2·6H2O and Al（NO3）3·9H2O,Al2（SO4）3 · 18H2O and MgSO4 · 7H2O by bi-titration. The synthesized samples were characterized by XRD,SEM and FT-IR. The results show that the typical Mg-A1-CO3 hydrotalcite with high crystallinity can be prepared with those material,and the product that was synthesized by MgCl2 · 6H2O and AlCl3· 6H2O has the best crystal structure and morphology; there exits edge-face effect in the compound that was prepared with Al2 （SO4）3 · 18H2O and MgSO4 ·7H2O,XRD and IR indicates that the SO4^2- in this sample are neither in free state, nor in the insertion layer.

关 键 词：镁铝水滑石 双滴定法 晶体结构 形貌 

分 类 号：O614.2[理学—无机化学]