Journal
CRYSTENGCOMM
Volume 13, Issue 14, Pages 4652-4657Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c1ce05119a
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Funding
- Beijing Natural Science Foundation [2102009]
- National Natural Science Foundation of China [20876159]
- Chinese Academy of Sciences [KJCX3. SYW.NANO03]
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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 alpha-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.
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