摘要
以MgCl_2·6H_2O和Na OH为原料,离子液体1-丁基-3-甲基咪唑醋酸盐([BMIM]Ac)和水为混合溶剂,采用低温水热法合成出前驱体Mg(OH)_2,再通过锻烧前驱体得到纳米MgO。选用X射线衍射(XRD)、X射线光电子能谱(XPS)、能量散射X射线(EDS)、扫描电镜(SEM)、透射电镜(TEM)、热重分析(TG)和红外光谱(FTIR)等技术对产物MgO的组成、晶型、表面形貌及结构等进行表征。结果表明,该法制得的纳米MgO为面心立方晶系结构,其颗粒呈棒状,粒径分布均匀,平均直径为20nm,长度为80nm。最后通过机理分析,得出离子液体在制备过程中主要起表面活性剂的作用。
The precursor magnesium hydroxide （Mg（OH）2） was prepared by low temperature hydrothermal method with using magnesium chloride （MgCl2） and sodium hydroxide （NaOH） as crude materials and ionic liquid, 1- butyl-3-methyl limidazolium acetate （[BMIM]Ac）, as a medium. Then the nano-magnesium oxide was obtained by calcination of the precursor magnesium hydroxide in a muffle furnace. The composition, crystal type, surface mor- phology and structure of the prepared nano-magnesium oxide were characterized by X-ray diffraction （XRD）, scanning electron microscopy （SEM）, high resolution transmission electron microscopy（HRTEM）, fourier transform infrared spectroscopy （IR） and thermo gravimetric （TG） analysis. The results showed that the rod shaped nano-magnesium oxide with the face centered cubic structure can be obtained by calcination of the precursor at 600℃. The average particle size of the magnesium oxide nanorod is 20nm in width and 80nm in length, and the particle size distribution is uniform. Finally, after the possible mechanism analysis, the ionic liquid in the preparation pro-cess mainly plays the role of the surface active agent.
出处
《化学工程师》
CAS
2016年第12期1-5,共5页
Chemical Engineer
基金
国家自然科学基金资助项目(No.51471003)
关键词
纳米氧化镁
离子液体
水热反应
nano-magnesium oxide
ionic liquids
hydrothermal synthesis
