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Synthesis of SrFe12O19/SiO2/TiO2 composites with core/shell/shell nano-structure and evaluation of their photo-catalytic efficiency for degradation of methylene blue

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Abstract

The SrFe12O19/SiO2/TiO2 nanostructures with hard magnetic core were successfully synthesized through the facile and efficient wet chemical processes. At first, nanocrystalline strontium hexaferrite (SrFe12O19) powder was prepared using a new co-precipitation route in ethanol/water media. In the next step, SrFe12O19/SiO2 composites were produced by well-known Stöber method using tetraethyl orthosilicate as precursor. Finally titania was coated on SrFe12O19/SiO2 composite particles using titanium n-butoxide precursor. The core/shell/shell nanostructures have been characterized by means of X-ray diffraction, vibrating sample magnetometer, Fourier transform infrared spectra, field emission scanning electron microscopy, and transmission electron microscopy equipped with an energy-dispersive X-ray spectroscopy detector. The catalytic activity of SrFe12O19/SiO2/TiO2 composites has been investigated in the degradation of methylene blue dye under UV illumination. The results indicated that the obtained SrFe12O19/SiO2/TiO2 composite has photo-catalytic properties and can be retrieved by magnetic separation. The photo-degradation of methylene blue dye was about 80% in the presence of photo-catalyst powder at irradiation time of 180 min. Recycled composite particles could be used again.

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Acknowledgements

The authors would like to thank Iran National Science Foundation (INSF) for financially supporting this research work under Contract Number of 94/sad/42699 on 9/11/2015.

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Authors and Affiliations

  1. Department of Materials Science and Engineering, Faculty of Technology and Engineering, Imam Khomeini International University (IKIU), Qazvin, Iran

    Fatemeh Bavarsiha & Masoud Rajabi

  2. Department of Chemical and Materials Engineering, Buein Zahra Technical University, Buein Zahra, Qazvin, Iran

    Mehdi Montazeri-Pour

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  1. Fatemeh Bavarsiha
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Correspondence to Masoud Rajabi.

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Bavarsiha, F., Rajabi, M. & Montazeri-Pour, M. Synthesis of SrFe12O19/SiO2/TiO2 composites with core/shell/shell nano-structure and evaluation of their photo-catalytic efficiency for degradation of methylene blue. J Mater Sci: Mater Electron 29, 1877–1887 (2018). https://doi.org/10.1007/s10854-017-8098-5

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