Journal of Sol-Gel Science and Technology
https://doi.org/10.1007/s10971-018-4692-0
ORIGINAL PAPER: SOL-GEL AND HYBRID MATERIALS WITH SURFACE
MODIFICATION FOR APPLICATIONS
Adsorption of lead(II), cadmium(II) and dysprosium(III) from
aqueous solutions using mesoporous silica modified with
phosphonic acid groups
Yulia S. Fetisova
1
●
Oksana A. Dudarko
2
●
Maja Bauman
3
●
Aleksandra Lobnik
3,4
●
Valeriia V. Sliesarenko
2
Received: 20 September 2017 / Accepted: 16 May 2018
© Springer Science+Business Media, LLC, part of Springer Nature 2018
Abstract
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 m
2
/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.
Graphical Abstract
* Valeriia V. Sliesarenko
v.v.sliesarenko@gmail.com
1
National University of “Kyiv-Mohyla Academy”, 2 Scovoroda
Str., Kyiv 04070, Ukraine
2
Chuiko Institute of Surface Chemistry, NAS of Ukraine, 17
General Naumov Str., Kyiv 03164, Ukraine
3
Institute for Environmental Protection and Sensors, IOS Ltd,
Beloruska 7, Maribor SI-2000, Slovenia
4
Faculty for Mechanical Engineering, University of Maribor,
Smetanova 17, Maribor SI-2000, Slovenia
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