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Magnetic properties and BSA adsorption of nano-Fe-embedded BaFe12O19 porous microfibers via organic gel-thermal selective reduction process

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Abstract

Magnetic nano-Fe-embedded BaFe12O19 (NFEB) porous microfibers with diameters about 1–5 μm were prepared by the organic gel-thermal selective reduction process. The NFEB porous microfibers were formed after reduction of the precursor Fe2O3–BaFe12O19 microfibers at 350 °C for 1 h. The precursor Fe2O3–BaFe12O19 microfibers were obtained by calcination of the gel fibers. In the NFEB porous microfibers, the cubic α-Fe particles with size about 300 nm are homogeneously embedded in the hexagonal plate-like barium ferrite and the pore sizes are around 50–150 nm. The magnetic properties of these NFEB porous microfibers are influenced by the mass ratio of α-Fe/BaFe12O19 and reduction conditions. The NFEB porous microfibers with the designed soft (α-Fe)/hard (BaFe12O19) mass ratio of 1/2 obtained at 375 °C for 1 h have the enhanced saturation magnetization (M sh ) of 73.9 Am2 kg−1, coercivity (H c ) of 81.6 kAm−1 and remanence (M r ) of 34.2 Am2 kg−1, compared to the single phase of BaFe12O19 and α-Fe microfibers. This enhanced magnetic properties can be attributed to the exchange-coupling interactions. The NFEB porous microfibers exhibit a higher BSA adsorption capability than each single phase of α-Fe microfibers and BaFe12O19 microfibers. The BSA adsorption is analyzed.

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Acknowledgments

This work was financially supported by the Research Fund for the Doctoral Program of Higher Education of China (Grant No. 20103227110006) and the Jiangsu Province’s Postgraduate Cultivation and Innovation Projects (Grant No. CX10B-257Z, CXZZ11_0557).

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Authors and Affiliations

  1. Institute for Advanced Materials, Jiangsu University, Zhenjiang, 212013, People’s Republic of China

    Xinchun Yang, Xiangqian Shen & Fuzhan Song

  2. School of Pharmacy, Jiangsu University, Zhenjiang, 212013, People’s Republic of China

    Ruijiang Liu

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  1. Xinchun Yang
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Correspondence to Xiangqian Shen.

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Yang, X., Liu, R., Shen, X. et al. Magnetic properties and BSA adsorption of nano-Fe-embedded BaFe12O19 porous microfibers via organic gel-thermal selective reduction process. J Sol-Gel Sci Technol 63, 8–15 (2012). https://doi.org/10.1007/s10971-012-2755-1

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  • DOI: https://doi.org/10.1007/s10971-012-2755-1

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