CIESC Journal ›› 2015, Vol. 66 ›› Issue (2): 843-847.DOI: 10.11949/j.issn.0438-1157.20141022

Previous Articles     Next Articles

Preparation of mono-dispersed MgO nanoparticles by using direct deposition in paraffin emulsion system

HE Xing, TAN Shiyu, ZHENG Xiaogang, DONG Lichun, LI Shaobo, CHEN Hongmei, LUO Ziping   

  1. School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, China
  • Received:2014-07-08 Revised:2014-10-13 Online:2015-02-05 Published:2015-02-05
  • Supported by:

    supported by the National Natural Science Foundation of China (21176270).

石蜡乳液中直接沉淀制备单分散性的纳米氧化镁

贺兴, 谭世语, 郑小刚, 董立春, 李少波, 陈红梅, 罗自萍   

  1. 重庆大学化学化工学院, 重庆 400044
  • 通讯作者: 罗自萍
  • 基金资助:

    国家自然科学基金项目(21176270)。

Abstract:

MgO nanoparticles were prepared by using a direct deposition method, in which, the precursor, alkaline magnesium carbonate/paraffin, was firstly obtained by direct precipitation of the mixture of MgCl2·6H2O and Na2CO3 in paraffin emulsion, and then calcined at 600℃. The nanoparticles were characterized by using TG-DTA, FTIR, XRD, BET and FESEM. Under the optimum conditions, the as-prepared MgO nanoparticles were hexagonal crystals with a uniform size of around 60 nm and a specific surface area of 132.54 m2·g-1. The optimum preparation conditions were: MgCl2·6H2O concentration, 0.6 mol·L-1; Na2CO3 concentration, 0.6 mol·L-1; reaction time, 0.5 h; calcination temperature, 600℃, and calcination time, 3 h.

Key words: MgO, emulsion system, nanoparticles, precipitation, paraffin

摘要:

MgCl2·6H2O和Na2CO3在石蜡乳液中直接沉淀出碱式碳酸镁/石蜡前驱体,该前驱体在600℃条件下焙烧后获得MgO纳米粉体。采用TG-DTA、FTIR、XRD、BET和FESEM等手段对MgO粉体进行表征分析,并研究焙烧温度和物料比对纳米MgO的粒径及形貌的影响。结果表明,在最佳工艺条件下,石蜡乳液体系中能够得到分散性好、晶粒呈六边形、颗粒均匀、平均粒径约60 nm和比表面积132.54 m2·g-1的纳米MgO。其最佳工艺条件为:MgCl2·6H2O溶液浓度0.6 mol·L-1、Na2CO3溶液浓度0.6 mol·L-1、反应时间0.5 h、焙烧温度600℃和焙烧时间3 h。

关键词: MgO, 乳液体系, 纳米粒子, 沉淀法, 石蜡

CLC Number: