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Synthesis and thermoanalytical study of SiO2–TiO2 composites modified with macrocyclic endoreceptors

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Abstract

We have developed processes for the fabrication of SiO2–TiO2 composites containing crown ethers (CEs) with composite: CE weight ratios from 1: 0.06 to 1: 1. As oxide sources, we used titania and silica sols. The composites were characterized by differential thermal analysis, X-ray diffraction, and adsorption gravimetry. The results demonstrate that most of the water and the solvent are bound into a complex with the CE, which decomposes at temperatures from 170 to 230°C. The temperature range of CE removal depends on the SiO2: TiO2 and oxide: CE ratios in the composite. Our results demonstrate effectiveness of strontium cation imprint formation in an adsorbent in the sol–gel processing step, which ensures an increase in the amount of strontium cation adsorption by 20%. We have identified conditions for quantitative lanthanum, strontium, and barium adsorption on the synthesized composites.

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Authors and Affiliations

  1. Belarussian State Technological University, ul. Sverdlova 13a, Minsk, 220006, Belarus

    A. N. Murashkevich & O. A. Alisienok

  2. Postovsky Institute of Organic Synthesis, Ural Branch, Russian Academy of Sciences, ul. S. Kovalevskoi/Akademicheskaya 22/20, Yekaterinburg, 620990, Russia

    A. I. Maksimovskikh & O. V. Fedorova

  3. Yeltsin Federal University, ul. Mira 19, Yekaterinburg, 620002, Russia

    A. I. Maksimovskikh

Authors
  1. A. N. Murashkevich
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  2. O. A. Alisienok
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  3. A. I. Maksimovskikh
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  4. O. V. Fedorova
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Correspondence to A. N. Murashkevich.

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Original Russian Text © A.N. Murashkevich, O.A. Alisienok, A.I. Maksimovskikh, O.V. Fedorova, 2016, published in Neorganicheskie Materialy, 2016, Vol. 52, No. 3, pp. 336–343.

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Murashkevich, A.N., Alisienok, O.A., Maksimovskikh, A.I. et al. Synthesis and thermoanalytical study of SiO2–TiO2 composites modified with macrocyclic endoreceptors. Inorg Mater 52, 294–300 (2016). https://doi.org/10.1134/S0020168516030122

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  • DOI: https://doi.org/10.1134/S0020168516030122

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