自组装膜诱导制备3D球状氢氧化镁  

Preparation of 3D spherical Mg(OH)_2 by self-assembled monolayers method

作　　者：袁秋华[1] 罗雄标[1] 张培新[1] 陆正武[2] 任祥忠[1] 张冬云[1] 

机构地区：[1]深圳大学化学与化工学院,深圳518060 [2]哈尔滨工业大学深圳研究生院,深圳518055

出　　处：《中国有色金属学报》2013年第3期735-741,共7页The Chinese Journal of Nonferrous Metals

基　　金：国家自然科学基金资助项目(20971088;51174138)

摘　　要：以六水氯化镁、氨水以及巯基乙胺等为原料，通过气体扩散反应，采用自组装单分子膜诱导法制备三维（3D）球状多级结构的Mg（OH）2。利用扫描电镜（SEM）、X射线衍射分析（XRD）、比表面（BET）等测试手段对产物的结构和形貌进行表征。结果表明，获得的Mg（OH）2具有微球状结构，其平均直径约为7grn，由大量弯曲的纳米薄片相互交织而成，且具有2-5nm单峰孔尺寸分布；SAMs诱导获得的球状Mg（OH）2的形成机制是形核一长大一自组装过程。通过精确控制Mg（OH）2的热分解过程，可得到球状、三峰多级结构的MgO。Mg（OH）2 with 3D spherical and multi-level structure was synthesized by a self-assembled monolayers （SAMs） method, which was controlled through a gas diffusion reaction process using magnesium chloride, ammonium hydroxide and cysteamine as raw materials. The structures and morphologies of the products were investigated by scanning electron microscopy （SEM）, X-ray diffractometry （XRD） and specific surface measurement （BET）. The results show that the prepared Mg（OH）2 has a micro-spherical structure with an average diameter of 7 grn. The Mg（OH）2 spheres consist of a large amount of interconnected nanosheets and show a unimodal pore-size distribution located in the range of 2-5 nm. The formation mechanism of spherical Mg（OH）2 induced by SAMs is nucleation--growth--self-assembly process. Moreover, MgO with spherical and multi-level structure with three peaks can also be obtained through precisely controlling fixrther thermal decomposition of Mg（OH）2 microspheres.

关 键 词：氢氧化镁 自组装 单分子膜诱导 微球结构 

分 类 号：O611.41[理学—无机化学] O614.22[理学—化学]