In-situ Synthesis and Normal Chromatographic Properties of Nonporous SiO2/ZrO2 Core-shell Composite Microspheres

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  • LI Jia
    Key Laboratory of Chemistry of Northwestern Plant Resources & Key Laboratory for Natural Medicine of Gansu Province, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences Graduate University of Chinese Academy of Sciences, Chinese Academy of Sciences
  • ZHANG Hong-Fei
    Key Laboratory of Chemistry of Northwestern Plant Resources & Key Laboratory for Natural Medicine of Gansu Province, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences Graduate University of Chinese Academy of Sciences, Chinese Academy of Sciences
  • SHI Yan-Ping
    Key Laboratory of Chemistry of Northwestern Plant Resources & Key Laboratory for Natural Medicine of Gansu Province, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences

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Abstract

Sub-2 μm core-shell SiO2/ZrO2 composite microspheres with nonporous SiO2 as the cores and ZrO2 nanoparticles as the shells were synthesized by sol-gel method in the current work. The fabrication consisted of (1) preparing monodisperse silica spheres; (2) coating the spheres with zirconia nanoparticles in-situ; and (3) calcining the composite microspheres at 823 K. Then uniform, regular, and ordered arrays of nanometer-scale zirconia crystalline particles were formed and dispersed on the surfaces of nonporous silica microspheres. A potential deposition mechanism in the synthesis process was proposed according to isoelectric point theory and to observe microstructural characteristics. The result showed that this stationary phase also has an advantage in the separation of basic compounds in the normal phase.

Journal

  • Analytical Sciences

    Analytical Sciences 27 (4), 447-, 2011

    The Japan Society for Analytical Chemistry

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