A Copper Hexacyanoferrate/Polymer/Silica Composite as Selective Sorbent for the Decontamination of Radioactive Caesium

Loos‐Neskovic, C.; Vidal-Madjar, Claire; Jiménez, Begoña; Pantazaki, Αnastasia A.; Federici, V.; Tamburini, Alessandro; Fédoroff, M.; Persidou, E.

doi:10.1524/ract.1999.85.34.143

Cited by 11 publications

(10 citation statements)

References 4 publications

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“…In order to avoid these problems, several composite materials with mainly silica supports loaded with cyano-bridged coordination polymers particles have been proposed. [8][9][10][11][12] The first kind of materials were K 2 M[Fe(CN) 6 ]/ SiO 2 composites (M = Ni, Cu, Co) obtained by successive a impregnation of porous silica 13 or polymer modified silica 14,15 by bivalent transition metal ions and a hexacyanoferrate precursor. The second kind of composites were synthesized by direct incorporation of coordination polymer particles (K 2 (CoFe(CN) 6 or K 2 (NiFe(CN) 6 )) into the silica gel 9 or into hydrated zirconia 16 during the synthesis.…”

Section: Introductionmentioning

confidence: 99%

Extraction of radioactive cesium using innovative functionalized porous materials

et al. 2012

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A new approach to an efficient and selective extraction of Cs + ions from water, sea water enriched with Cs + and a radioactive solution simulating the effluents of the Fukushima reactors ( 137 Cs, 29 kBq L 21 ) was developed by using porous silica-or glass-based nanocomposites containing Prussian blue type nanoparticles, Co 2+ /[Fe(CN) 6 ] 32 , with sizes below 10 nm. A particular emphasis is given on the kinetics of cesium sorption fitted by using the classical reaction order model as well as a diffusion model in order to better understand the sorption mechanism. Compared to the amount of Co 2+ / [Fe(CN) 6 ] 32 nanoparticles, the sorption capacities of studied nanocomposites are more than three times higher than the ones observed for the respective bulk materials. These nanocomposites present a high selectivity to Cs + and extract it in trace amounts.

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Section: Introductionmentioning

confidence: 99%

Extraction of radioactive cesium using innovative functionalized porous materials

et al. 2012

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“…From a fundamental point of view, hybrid systems such as those described above can be used to investigate properties of materials that contain an organic/inorganic interface. From a practical point of view, hybrid organic/inorganic materials including organic groups grafted on porous materials can be used for several applications such as chromatography, separation chemistry, heterogeneous catalysis for fine chemicals production, organic or cationic pollutant removals, − energy storage, , as well as other applications − as they combine a large surface area of the host porous substrate with the useful properties of the organic groups.…”

Section: Introductionmentioning

confidence: 99%

Experiment and Theory of Low-Pressure Nitrogen Adsorption in Organic Layers Supported or Grafted on Inorganic Adsorbents: Toward a Tool To Characterize Surfaces of Hybrid Organic/Inorganic Systems

et al. 2012

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We report experimental nitrogen adsorption isotherms of organics-coated silicas, which exhibit a low-pressure desorption branch that does not meet the adsorption branch upon emptying of the pores. To address the physical origin of such a hysteresis loop, we propose an equilibrium thermodynamic model that enables one to explain this phenomenon. The present model assumes that, upon adsorption, a small amount of nitrogen molecules penetrate within the organic layer and reach adsorption sites that are located on the inorganic surface, between the grafted or adsorbed organic molecules. The number of accessible adsorption sites thus varies with the increasing gas pressure, and then we assume that it stays constant upon desorption. Comparison with experimental data shows that our model captures the features of nitrogen adsorption on such hybrid organic/inorganic materials. In particular, in addition to predicting the shape of the adsorption isotherm, the model is able to estimate, with a reasonable number of adjustable parameters, the height of the low-pressure hysteresis loop and to assess in a qualitative fashion the local density of the organic chains at the surface of the material.

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“…The 1 H, 13 C, and 29 Si NMR spectra were obtained with a Bruker 400 ultrashield VS spectrometer using deuterated chloroform as the solvent and internal standard. The chemical shifts are reported in parts per million (ppm).…”

Section: Methodsmentioning

confidence: 99%

An Original “Click and Bind” Approach for Immobilizing Copper Hexacyanoferrate Nanoparticles on Mesoporous Silica

et al. 2013

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We present an original approach for preparing silica-based nanocomposites containing Prussian blue-type nanoparticles via click chemistry. Click reaction is used to prepare a triazole-copper complex in a single step; this complex is subsequently used to anchor copper hexacyanoferrate nanoparticles within a porous silica matrix (porous glass pearls or SBA-15). This CuAAC "click reaction" was performed using a relatively large copper concentration for two reasons: First, the Cu catalyzes the triazole ring formation, then the ring acts as a chelator, immobilizing the copper inside the silica matrix. Successively adding hexacyanoferrate precursors that coordinate with the copper ions at the triazole sites led to efficient and selective nanocomposite formation; this material was developed to mitigate Cs + ion contamination. The efficiency of these asprepared nanocomposites and their selectivity for Cs + from different effluents, such as pure water, seawater, and radioactive seawater (simulating the Fukushima site), were evaluated using sorption experiments. These immobilized nanocomposites present a high Cs + selectivity while demonstrating a K d value above that of the bulk material.

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A Copper Hexacyanoferrate/Polymer/Silica Composite as Selective Sorbent for the Decontamination of Radioactive Caesium

Cited by 11 publications

References 4 publications

Extraction of radioactive cesium using innovative functionalized porous materials

Extraction of radioactive cesium using innovative functionalized porous materials

Experiment and Theory of Low-Pressure Nitrogen Adsorption in Organic Layers Supported or Grafted on Inorganic Adsorbents: Toward a Tool To Characterize Surfaces of Hybrid Organic/Inorganic Systems

An Original “Click and Bind” Approach for Immobilizing Copper Hexacyanoferrate Nanoparticles on Mesoporous Silica

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