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Issue 38, 2009
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Ordered magnetic core–manganese oxide shell nanostructures and their application in water treatment

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Abstract

In this paper, we have reported a facile method for the synthesis of ordered magnetic core–manganese oxide shell nanostructures. The process included two steps. First, manganese ferrite nanoparticles were obtained through a solvothermal method. Then, the manganese ferrite nanoparticles were mixed directly with KMnO4 solution without any additional modified procedures of the magnetic cores. It has been found that Mn element in the core can react with KMnO4 to form manganese oxide which acts as a seed for the in-situgrowth of manganese oxide shells. This is significant for the controllable fabrication of symmetrical ordered manganese oxide shell structures. The shell thickness can be easily controlled through the reaction time. Transmission electron microscopy, scanning electron microscopy, X-ray photoelectron spectroscopy, X-ray powder diffraction and energy-dispersive X-ray spectroscopy have been employed to characterize the products at different reaction time. The magnetic materials can be used as absorbents in wastewater treatment and exhibit a strong capability to remove organic pollutants. Furthermore, the materials are superparamagnetic and exhibit relative high saturation magnetization at room temperature, which makes the separation procedure more convenient in wastewater treatment.

Graphical abstract: Ordered magnetic core–manganese oxide shell nanostructures and their application in water treatment

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Supplementary files

Article information


Submitted
30 Jun 2009
Accepted
23 Jul 2009
First published
14 Aug 2009

J. Mater. Chem., 2009,19, 7030-7035
Article type
Paper

Ordered magnetic core–manganese oxide shell nanostructures and their application in water treatment

Y. Zhai, J. Zhai, M. Zhou and S. Dong, J. Mater. Chem., 2009, 19, 7030
DOI: 10.1039/B912767D

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