Mg(OH)_2纳米晶的可控制备  

Controllable synthesis of Mg(OH)_2 nanocrystals

作　　者：孙灵娜[1] 洪伟良[1] 刘日明[1] 田德余[1] 

机构地区：[1]深圳市功能高分子重点实验室,深圳大学化学与化工学院,深圳518060

出　　处：《深圳大学学报（理工版）》2013年第2期205-209,共5页Journal of Shenzhen University(Science and Engineering)

基　　金：国家自然科学基金资助项目(21001074);深圳市生物;互联网;新能源;新材料产业发展专项基金资助项目(XCL201110045)~~

摘　　要：以醋酸镁为原料,氨水为沉淀剂,采用沉淀法制备Mg(OH)2纳米晶,使其自然干燥,以降低烘干对Mg(OH)2产生硬团聚的影响.探讨氨水浓度、聚乙二醇添加量、反应温度和反应时间等对产物形貌及产率的影响,推测其生长机理.通过对反应条件的调控,分别制得直径约4 nm的Mg(OH)2针状结构、直径20～30 nm的纳米颗粒和花状结构,以及直径40 nm的棒状结构.利用透射电子显微镜对产物形貌和粒径进行分析,采用X射线粉末衍射法研究Mg(OH)2的晶体结构.Magnesium hydroxide nanocrystals were synthesized by the method of homogeneous precipitation with magnesium acetate and ammonia as raw materials. The products were dried by a natural way to avoid the agglomeration of Mg （OH） 2 nanocrystals. The impacts of the factors, such as concentration of NH3 · H2O, dosa- ges of polyethylene glycol（PEG）, temperature, and reaction time on the morphologies and yields of Mg （OH）2 were studied in detail. The possible mechanism of crystal growth was also explored. By carefully controlling the fundamental experimental parameters, the morphologies of needle-like nanostructures with diameters of 4 nm, nanoparticles with diameters of 20 - 30 nm, flower-like nanostructures and nanorods with diameters of 40 nm were efficiently obtained, respectively. The morphology, size powder diffraction and transmission electron microscopy. and structure of the product were characterized by X-ray

关 键 词：无机化合物 醋酸镁 沉淀法 氢氧化镁 纳米晶 生长机理 

分 类 号：O614[理学—无机化学]