Preparation of ferrite MFe2O4 (M = Co, Ni) ribbons with nanoporous structure and their magnetic properties

The Journal of Physical Chemistry. B
Zhongli WangJian Meng

Abstract

Spinel ferrite, MFe 2O 4 (M = Co, Ni), ribbons with nanoporous structure were prepared by electrospinning combined with sol-gel technology. The ribbons were formed through the agglomeration of magnetic nanoparticles with PVP as the structure directing template. The length of the polycrystalline ribbons can reach millimeters, and the width of the ribbons can be tuned from several micrometers to several hundred nanometers by changing the concentration of precursor. The nanoporous structure was formed during the decomposition of PVP and inorganic salts. The ribbons exhibited weak saturation magnetizations and low coercivities at room temperature, but at low temperature, saturation magnetizations and coercivities increased a lot, especially for CoFe 2O 4 ribbons, reaching 72 emu/g and 1.45 T at 2 k, respectively. These novel magnetic ribbons can potentially be used in micro/nano electronic devices, gas-sensors, and catalysts.

References

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Jul 21, 2006·The Journal of Physical Chemistry. B·Don Keun LeePieter Stroeve
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Citations

Aug 18, 2010·Chemical Communications : Chem Comm·Jianguo GuanWeidong Shi
May 21, 2013·Journal of Biomaterials Science. Polymer Edition·Ta-Chun LinJui-Che Lin
Jul 19, 2012·The Journal of Chemical Physics·Baofeng Zhang, Richard M Stratt
Dec 24, 2015·Nanoscale·Zhaohui WuWei Wu

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