机械化学法制备Mg-Al水滑石  

Mechanochemical Synthesis of Mg-Al Layered Double Hydroxides

作　　者：高宏[1] 边令喜[1] 于洪波[1] 

机构地区：[1]大连交通大学材料科学与工程学院,辽宁大连116028

出　　处：《大连交通大学学报》2011年第4期57-61,共5页Journal of Dalian Jiaotong University

基　　金：国家自然科学基金资助项目(50974026)

摘　　要：以Mg(OH)2、Al(OH)3为镁源和铝源,外加NaHCO3,采用机械化学法制备前驱体经水处理后合成了镁铝水滑石(Mg-Al LDHs),考察了研磨时间、Mg-A1摩尔比、球料比、水处理温度及水处理时间对水滑石晶粒度和微观形貌的影响规律.并用XRD、SEM等对合成产物进行了表征.发现随Mg-Al比的增加、球料比变大晶体结构趋于完整,晶粒尺寸增大.The precursor prepared by magnesium-aluminium layered double hydroxides（Mg-Al LDHs） is synthesized using Mg（OH）2 and Al（OH）3 as the magnesium and aluminum sources plus NaHCO3 by mechanochemical route.The influences of grinding time,Mg-A1 molar ratio,the ball and powder ratio,temperature and time on the hydrotalcite grain size and morphology were investigated.Crystal structure and grain size of the hydroxides were investigated by X-ray diffraction and scanning electron microscopy.Experiment results show that with increasing Mg-Al ratio and the ratio of ball to powder,the crystal structure tends to integrate,and grain size becomes greater.

关 键 词：MG-AL水滑石 机械化学 水处理 晶粒度 

分 类 号：O614.31[理学—无机化学]