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Synthesis of silica-coated Fe-based coordination polymers as precursor for preparation of Fe2O3@SiO2 core–shell nanoparticles

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Abstract

We report a new synthetic route for preparation of Fe2O3@SiO2 core–shell nanoparticles by calcination of silica-coated Fe-based nanoscale coordination polymers (Fe-NCPs). Firstly, Fe-NCPs were synthesized by microwave-assisted method. The as-synthesized Fe-NCPs were then coated with silica as a shell via a sol–gel process. Finally, Fe2O3@SiO2 core–shell nanoparticles were achieved through the calcination of the silica-coated Fe-NCPs. The as-synthesized nanoparticles were investigated by scanning electron microscopy, transmission electron microscopy, powder X-ray diffraction, and N2 sorption–desorption isotherms. The as-synthesized nanoparticles exhibit core–shell structured, magnetic characteristics and high porosity.

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Acknowledgments

This work was supported by the National Natural Science Foundation of China (NSFC, 20971001), the NSFC-CAS Joint Fund for Research Based on Large-Scale Scientific Facilities (10979014), the Natural Science Foundation Department of Education of Anhui Province, China (KJ2011B042), the Program for New Century Excellent Talents in University, Ministry of Education, China (NCET-08-0617), and the “211 Project” of Anhui University.

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Correspondence to Fang Wu or Ling-Guang Qiu.

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Wu, F., Qiu, LG., Jiang, X. et al. Synthesis of silica-coated Fe-based coordination polymers as precursor for preparation of Fe2O3@SiO2 core–shell nanoparticles. J Porous Mater 22, 559–563 (2015). https://doi.org/10.1007/s10934-015-9928-6

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