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The preparation and properties of monodisperse core-shell silica magnetic microspheres

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Abstract

The monodisperse core-shell silica magnetic microspheres (MMS) were synthesized by sol–gel method gelling in the emulsion. Optical microscope (OM), field emission scanning electron microscope (FESEM), nitrogen adsorption and desorption Brunauer Emmett Teller Procedure (BET) isotherms and Barrett-Joyner-Halenda (BJH) pore size distribution measurements, X-ray diffraction (XRD), energy dispersive spectrometer (EDS) and vibrating sample magnetometer (VSM) were used to characterize the appearance, size distribution, phase, specific surface area, chemical composition and magnetic property of silica MMS. The results showed that silica MMS prepared through sol–gel method with acid-alkali two-step catalyze and gelling in emulsion exhibited the superior core-shell structure and size distribution of the microspheres concentrated in about 20 μm. The main phase of microspheres was amorphous silica and spinel ferroferric oxide. Meanwhile, the microspheres remained the superparamagnetic behavior and could be used as biomaterials.

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Acknowledgements

This work was supported by National Natural Science Foundation of China with award mumber 50272041 and also supported by Science & Technology Commission of Shanghai Municipality (STCSM) with award number 0452nm059.

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Authors and Affiliations

  1. School of Material Science and Engineering, Tongji University, Shanghai, 200092, China

    Min-yi Lou, Qiu-ling Jia, De-ping Wang, Bing Liu & Wen-hai Huang

  2. Shanghai Key Laboratory of Metallic Material, Shanghai, 200092, China

    Min-yi Lou, Qiu-ling Jia, De-ping Wang, Bing Liu & Wen-hai Huang

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  1. Min-yi Lou
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  2. Qiu-ling Jia
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  3. De-ping Wang
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  4. Bing Liu
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  5. Wen-hai Huang
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Corresponding author

Correspondence to Min-yi Lou.

Additional information

This work is supported by both National Science Foundation 50572072 and Science & Technology Commission of Shanghai Municipality (STCSM) 0452nm059.

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Lou, My., Jia, Ql., Wang, Dp. et al. The preparation and properties of monodisperse core-shell silica magnetic microspheres. J Mater Sci: Mater Med 19, 217–223 (2008). https://doi.org/10.1007/s10856-007-3094-6

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  • DOI: https://doi.org/10.1007/s10856-007-3094-6

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