Adsorption of lead(II), cadmium(II) and dysprosium(III) from aqueous solutions using mesoporous silica modified with phosphonic acid groups


The mesoporous silica samples with different concentrations of phosphonic acid groups on the surface were obtained by direct template synthesis. The block-copolymer Pluronic P123 was used as a template, and sodium meta-silicate with diethylphosphatoethyltriethoxysilane as precursors. According to the SAXS diffractograms, mesoporous silica samples have a p6mm hexagonal symmetry. In addition, we used sol–gel method to synthesize xerogel with the same groups for comparison. All samples possess high values of specific surface area 615–730 m2/g and sorption pore volume. FTIR and potentiometric titration methods were used to investigate the surface layer of these samples. Sorption properties of the samples with phosphonic acid groups were studied in respect to a row of metal cations, among which we focused on lead(II), cadmium(II), and dysprosium(III) cations.


  • Mesoporous silica with Phosphonic acid groups on the surface layer prepared via template synthesis.

  • Study of low-T adsorption of nitrogen (BET), FTIR and potentiometric titration.

  • Metal ion sorption properties of the samples compared to Xerogel

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This research is sponsored by NATO’s Public Diplomacy Division in the framework of «Science for Peace» NATO Project SPS.NUKR.SFP 984398.

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Correspondence to Valeriia V. Sliesarenko.

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Fetisova, Y.S., Dudarko, O.A., Bauman, M. et al. Adsorption of lead(II), cadmium(II) and dysprosium(III) from aqueous solutions using mesoporous silica modified with phosphonic acid groups. J Sol-Gel Sci Technol 88, 66–76 (2018).

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  • Adsorption
  • Mesoporous silica
  • Organosilica
  • Phosphonic acid groups
  • SBA-15
  • Template synthesis