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Synthesis of Hollow SiO2 Nanoparticles from Dy2O3@SiO2 Core–Shell Nanocomposites via a Recyclable Sonochemical Method

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Abstract

Hollow silica nanoparticles were prepared from Dy2O3@SiO2 core–shell nanocomposites, for the first time, by a simple ultrasonic assisted sol–gel method. The Dy2O3@SiO2 core–shell nanocomposites were prepared by the deposition of a SiO2 layer onto the surface of Dy2O3 nanoparticles using a three-step coating process. The hollow SiO2 nanostructures were obtained by selective removal of the Dy2O3 cores. The structure, morphology and composition of the products were determined by the techniques of X-ray diffraction, Fourier transfom infrared spectroscopy, scanning electron microscopy, and transmission electron microscopy. The results indicated that hollow SiO2 nanostructures were sphere-like shape with the average size of 20 nm and had an amorphous crystal structure. The important advantage of this process is the recyclability of the Dy2O3 nanoparticles as the starting material of the reaction.

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Acknowledgments

Authors are grateful to the council of Iran National Science Foundation and university of Kashan for their unending effort to provide financial support to undertake this work.

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Authors and Affiliations

  1. Institute of Nano Science and Nano Technology, University of Kashan, Kashan, P.O. Box 87317-51167, Islamic Republic of Iran

    Masoud Salavati-Niasari & Jaber Javidi

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  1. Masoud Salavati-Niasari
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  2. Jaber Javidi
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Correspondence to Masoud Salavati-Niasari.

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Salavati-Niasari, M., Javidi, J. Synthesis of Hollow SiO2 Nanoparticles from Dy2O3@SiO2 Core–Shell Nanocomposites via a Recyclable Sonochemical Method. J Clust Sci 23, 1019–1028 (2012). https://doi.org/10.1007/s10876-012-0490-y

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  • DOI: https://doi.org/10.1007/s10876-012-0490-y

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