Conducting properties of a gel ionite modified with zirconium hydrophosphate nanoparticles

Dzyazko, Yuliya; Пономарева, Л. Н.; Volfkovich, Yu. M.; Сосенкин, В. Е.; Belyakov, V. N.

doi:10.1134/s1023193513030075

Cited by 27 publications

(16 citation statements)

References 13 publications

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“…As shown previously [ 39 , 40 , 42 ], single nanoparticles are located in clusters and channels, aggregates can be placed in regions between gel fields. The particles are stabilized by pore walls, which prevent further aggregation.…”

Section: Resultsmentioning

confidence: 55%

Formation of Zirconium Hydrophosphate Nanoparticles and Their Effect on Sorption of Uranyl Cations

Perlova

Dzyazko²,

Perlova

et al. 2017

Nanoscale Res Lett

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Organic-inorganic ion-exchangers were obtained by incorporation of zirconium hydrophosphate into gel-like strongly acidic polymer matrix by means of precipitation from the solution of zirconium oxychloride with phosphoric acid. The approach for purposeful control of a size of the incorporated particles has been developed based on Ostwald-Freundich equation. This equation has been adapted for precipitation in ion exchange materials. Both single nanoparticles (2–20 nm) and their aggregates were found in the polymer. Regulation of salt or acid concentration allows us to decrease size of the aggregates approximately in 10 times. Smaller particles are formed in the resin, which possess lower exchange capacity. Sorption of U(VI) cations from the solution containing also hydrochloride acid was studied. Exchange capacity of the composites is ≈2 times higher in comparison with the pristine resin. The organic-inorganic sorbents show higher sorption rate despite chemical interaction of sorbed ions with functional groups of the inorganic constituent: the models of reaction of pseudo-first or pseudo-second order can be applied. In general, decreasing in size of incorporated particles provides acceleration of ion exchange. The composites can be regenerated completely, this gives a possibility of their multiple use.

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Section: Resultsmentioning

confidence: 55%

Formation of Zirconium Hydrophosphate Nanoparticles and Their Effect on Sorption of Uranyl Cations

Perlova

Dzyazko²,

Perlova

et al. 2017

Nanoscale Res Lett

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“…Impregnation of the cation-exchange resin with a ZrOCl2 solution followed by treatment with phosphoric acid causes deposition of the non-aggregated nanoparticles (4-20 nm) inside the polymer matrix [12,13]. They are evidently stabilized by walls of the transport pores.…”

Section: Visualization Of the Inorganic Constituentmentioning

confidence: 97%

“…Ion transport through the ion-exchange membranes is determined by a ratio of volumes of different types of pores [12,13]. Earlier we have proposed the parameter: it is a ratio of volumes of transport pores and pores, which are free from functional groups [12].…”

Section: Interrelation Between Polymer Porosity and Membrane Conductimentioning

confidence: 99%

“…Another approach is modification of the membranes, which are produced by industry, with nanoparticles of inorganic ion-exchanger [11]. This way allows us to incorporate single nanoparticles [12][13][14] or their aggregates [15]. Each type of the particles affects functional properties of the membranes, however, this problem was not researched.…”

Section: Introductionmentioning

confidence: 97%

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Heterogeneous Membranes Modified with Nanoparticles of Inorganic Ion-Exchangers for Whey Demineralization

Dzyazko

Rozhdestveskaya

Zmievskii

et al. 2015

Materials Today: Proceedings

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“…Polymer matrix was filled with zirconium hydrophosphate (ZHP), a choice of the modifier due to its chemical stability and possibility to obtain nanosized particles inside polymer pores [25][26][27][28]. In opposite to hydrated zirconium dioxide, which was used for the modification of ceramics, ZHP is characterized by higher surface charge density in neutral solutions.…”

Section: Modification Of the Polymer Matrixmentioning

confidence: 99%

Organic-inorganic materials containing nanoparticles of zirconium hydrophosphate for baromembrane separation

Dzyazko¹,

Rozhdestvenskaya²,

Zmievskii³

et al. 2016

Nano Online

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Organic-inorganic membranes were obtained by stepwise modification of poly(ethyleneterephthalate) track membrane with nanoparticles of zirconium hydrophosphate. The modifier was inserted inside pores of the polymer, a size of which is 0.33 μm. Inner active layer was formed by this manner. Evolution of morphology and functional properties of the membranes were investigated using methods of porosimetry, potentiometry and electron microscopy. The nanoparticles (4 to 10 nm) were found to form aggregates, which block pores of the polymer. Pores between the aggregates (4 to 8 nm) as well as considerable surface charge density provide significant transport numbers of counter ions (up to 0.86 for Na+). The materials were applied to baromembrane separation of corn distillery. It was found that precipitate is formed mainly inside the pores of the pristine membrane. In the case of the organic-inorganic material, the deposition occurs onto the outer surface and can be removed by mechanical way.Location of the active layer inside membranes protects it against damage.

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Conducting properties of a gel ionite modified with zirconium hydrophosphate nanoparticles

Cited by 27 publications

References 13 publications

Formation of Zirconium Hydrophosphate Nanoparticles and Their Effect on Sorption of Uranyl Cations

Formation of Zirconium Hydrophosphate Nanoparticles and Their Effect on Sorption of Uranyl Cations

Heterogeneous Membranes Modified with Nanoparticles of Inorganic Ion-Exchangers for Whey Demineralization

Organic-inorganic materials containing nanoparticles of zirconium hydrophosphate for baromembrane separation

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