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

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

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原位塌陷自组装法制备氧化锰纳米结构

周丽¹,胡玉才²,贺军辉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 E-mail:jhhe@mail.ipc.ac.cn
基金资助:
国家自然科学基金项目;国家自然科学基金委员会—中国工程物理研究院联合基金;中国科学院光化学转换与功能材料重点实验室开放课题;山东省自然科学基金

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 E-mail:jhhe@mail.ipc.ac.cn

Abstract

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

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原位塌陷自组装法制备氧化锰纳米结构

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

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