Acta Chimica Sinica ›› 2011, Vol. 69 ›› Issue (06): 666-672. Previous Articles     Next Articles

Full paper



  1. 1. 中国科学院理化技术研究所
    2. 鲁东大学化学与材料科学学院
  • 投稿日期:2010-04-06 修回日期:2010-09-07 发布日期:2011-03-28
  • 通讯作者: 贺军辉
  • 基金资助:

In-situ collapse self-assembly route to manganese oxide nanostructures

  • Received:2010-04-06 Revised:2010-09-07 Published:2011-03-28
  • Contact: Junhui He

A straightforward O/W emulsion route has been used to fabricate hierarchical manganese oxide nanostructures using ethyl ether(EE) as co-solvent, In the emulsion, the “Baeyer test for unsaturation” reaction quickly occurs between KMnO4 and oleic acid at the O/W interface. The main advantage of adding ethyl ether is to reduce the amount of oleic acid and to simplify greatly the washing process of the products. The as-obtained products were characterized by SEM, TEM and XRD measurements. The morphology and size of products could be controlled by adjusting the volume ratio of OA/EE, the molar ratio of KMnO4/OA, the volume ratio of oil phase/water phase and the reaction temperature. In the range of OA/EE volume ratio of 10:0~3:7, honeycomb manganese oxide nanoparticles were obtained. When the molar ratio of KMnO4/OA was less than 1:1, honeycomb mangnese oxide nanoparticles were also obtained. When thevolume ratio of oil phase/water phase was greater than 2:75, manganese oxide nanopletes and their aggregates were produced. The increase of reaction temperature within a narrow range have no effect on the morphology of product. Based on the experimental observations, a plausible formation mechanism via continuous collapse self-assembly of nanoplatelets was proposed.

Key words: self-assembled, O/W emulsion, manganese oxide, nanostructure