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Issue 14, 2011
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Fabrication and growth mechanism of hierarchical porous Fe3O4 hollow sub-microspheres and their magnetic properties

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Abstract

Hierarchical porous Fe3O4 hollow sub-microspheres with nanoparticles as the in situ formed building blocks were fabricated via a novel one-pot solvothermal method. The possible formation mechanism of these hierarchical porous Fe3O4 hollow sub-microspheres was explored. In this formation process, solid Fe2O3 sub-microspheres were first obtained, and then gradually reduced to Fe3O4 sub-microspheres with core/shell structure which finally developed into hierarchical Fe3O4 sub-microspheres with hollow interiors through the Ostwald ripening process. Interestingly, solid α-Fe2O3 sub-microspheres obtained in the initial stage might act as structure director in the formation of Fe3O4 hollow sub-microspheres. Moreover, preliminary results of magnetic properties of the hierarchical porous Fe3O4 hollow sub-microspheres were also reported. The hierarchical porous Fe3O4 hollow sub-microspheres exhibited enhanced saturation magnetization as compared with Fe3O4 single-crystal hollow sub-microspheres with similar sizes and Fe3O4 hollow nanospheres.

Graphical abstract: Fabrication and growth mechanism of hierarchical porous Fe3O4 hollow sub-microspheres and their magnetic properties

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Publication details

The article was received on 23 Jan 2011, accepted on 12 Apr 2011 and first published on 26 May 2011


Article type: Paper
DOI: 10.1039/C1CE05119A
Citation: CrystEngComm, 2011,13, 4652-4657
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    Fabrication and growth mechanism of hierarchical porous Fe3O4 hollow sub-microspheres and their magnetic properties

    Y. Wang, Q. Zhu and L. Tao, CrystEngComm, 2011, 13, 4652
    DOI: 10.1039/C1CE05119A

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