气体扩散法制备垂直排列氢氧化镁纳米薄片  

Preparation of Vertically Aligned Magnesium Hydroxide Nanosheets via a Gas-Diffusion Route

作　　者：袁秋华[1] 陆正武[2] 张培新[1] 罗雄标[1] 任祥忠[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：《无机化学学报》2012年第7期1429-1434,共6页Chinese Journal of Inorganic Chemistry

基　　金：国家自然科学基金(No.20971088;51174138)资助项目

摘　　要：以氯化镁和氢氧化铵为原料,采用气体扩散技术制备了垂直排列氢氧化镁纳米薄片。利用场发射扫描电子显微镜(FE-SEM)、X射线衍射(XRD)、红外光谱(IR)以及差热分析(DTA)等分析测试技术研究了纳米氢氧化镁薄片的形貌、结构、成分以及热稳定性和比表面积等,结果表明,纳米氢氧化镁薄片的生长是一个成核-生长-组装过程,随着生长时间的延长,形貌从二维紧凑型结构演变成三维花状超结构,反应过程中液体-晶体和液-气界面的自由能作用使得纳米薄片趋向于垂直排列。此外,氢氧化镁纳米薄片薄膜的疏水性能也进行了研究。Vertically aligned magnesium hydroxide nanosheets （MHNSs） have diffusion process, using magnesium chloride and ammonium hydroxide as been synthesized by a facile gas- raw materials. The morphology, structure, composition, thermal stability and specific surface area of the samples were inves tigated by field emission scanning electron microscopy（FE-SEM）, X-ray diffraction（XRD）, Fourier transform infrared spectroscopy （FTIR） and thermogravimetric analysis. The results show that the growth mechanism of the MHNSs is a nucleation-growth-assembly process. The morphology of the MHNSs evolves from two-dimensional compact structures to three-dimensional flowerlike superstructures with the growth time increasing. The vertical alignment of the MHNSs may result from the interface free energies of the liquid-crystal and liquid-gas interfaces in the process. Moreover, the hydrophobicity of the MHNS films is also investigated.

关 键 词：氢氧化镁 纳米薄片 气体扩散 两相界面 

分 类 号：O611.4[理学—无机化学]