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Efficient one-pot sonochemical synthesis of thickness-controlled silica-coated superparamagnetic iron oxide (Fe3O4/SiO2) nanospheres

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Abstract

A facile and eco-friendly efficient sonochemical approach was designed for the synthesis of highly crystalline Fe3O4 and Fe3O4/SiO2 core/shell nanospheres in single reaction. The generated physical properties (shock waves, microjets, and turbulent flows) from ultrasonication as a consequence of the collapse of microbubbles and polyvinylpyrrolidone (PVP) as a chemical linker were found to play a crucial role in the successful formation of the core/shell NPs within short time than the previously reported methods. Transmission electron microscopy revealed that a uniform SiO2 shell is successfully coated over Fe3O4 nanospheres, and the thickness of the silica shell could be easily controlled in the range from 5 to 15 nm by adjusting the reaction parameters. X-ray diffraction data were employed to confirm the formation of highly crystalline and pure phase of a cubic inverse spinel structure for magnetite (Fe3O4) nanospheres. The magnetic properties of the as-synthesized Fe3O4 and Fe3O4/SiO2 core/shell nanospheres were measured at room temperature using vibrating sample magnetometer, and the results demonstrated a high magnetic moment values with superparamagnetic properties.

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Acknowledgements

This work was supported by the Natural Science Foundation of China (NSFC) project (21673272 and 21373254) and the postdoctoral fellowship project of President’s International Fellowship Initiative (PIFI) by Chinese Academy of Sciences, China.

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Authors and Affiliations

  1. State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, 030001, China

    Mohamed Abbas & Jiangang Chen

  2. Ceramics Department, National Research Centre, El-Bohouth Str., Cairo, 12622, Egypt

    Mohamed Abbas

  3. Physics Department, Faculty of Science, Minia University, Minia, Egypt

    M. O. Abdel-Hamed

Authors
  1. Mohamed Abbas
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  2. M. O. Abdel-Hamed
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  3. Jiangang Chen
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Correspondence to Mohamed Abbas or Jiangang Chen.

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Abbas, M., Abdel-Hamed, M. & Chen, J. Efficient one-pot sonochemical synthesis of thickness-controlled silica-coated superparamagnetic iron oxide (Fe3O4/SiO2) nanospheres. Appl. Phys. A 123, 775 (2017). https://doi.org/10.1007/s00339-017-1397-0

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  • DOI: https://doi.org/10.1007/s00339-017-1397-0

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