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.
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
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)
关键词
氢氧化镁
自组装
单分子膜诱导
微球结构
magnesium hydroxide
self-assemble
monolayers induction
micro-spherical structure
作者简介
通信作者：张培新，教授，博士；电话：0755-26558134；E-mailpxzhang2000@163．com
