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WO2018006958A1 - Particule coeur-écorce - Google Patents

Particule coeur-écorce Download PDF

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Publication number
WO2018006958A1
WO2018006958A1 PCT/EP2016/066050 EP2016066050W WO2018006958A1 WO 2018006958 A1 WO2018006958 A1 WO 2018006958A1 EP 2016066050 W EP2016066050 W EP 2016066050W WO 2018006958 A1 WO2018006958 A1 WO 2018006958A1
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WO
WIPO (PCT)
Prior art keywords
core
shell
molecules
matrix
group
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/EP2016/066050
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German (de)
English (en)
Inventor
Marcus Halik
Simon SCHEINER
Hanno Dietrich
Dirk Zahn
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Friedrich Alexander Universitaet Erlangen Nuernberg
Original Assignee
Friedrich Alexander Universitaet Erlangen Nuernberg
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Priority to PCT/EP2016/066050 priority Critical patent/WO2018006958A1/fr
Publication of WO2018006958A1 publication Critical patent/WO2018006958A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/48—Treatment of water, waste water, or sewage with magnetic or electric fields
    • C02F1/488—Treatment of water, waste water, or sewage with magnetic or electric fields for separation of magnetic materials, e.g. magnetic flocculation
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K9/00—Medicinal preparations characterised by special physical form
    • A61K9/48—Preparations in capsules, e.g. of gelatin, of chocolate
    • A61K9/50—Microcapsules having a gas, liquid or semi-solid filling; Solid microparticles or pellets surrounded by a distinct coating layer, e.g. coated microspheres, coated drug crystals
    • A61K9/5094—Microcapsules containing magnetic carrier material, e.g. ferrite for drug targeting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
    • B01J20/28002—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their physical properties
    • B01J20/28009—Magnetic properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/30—Processes for preparing, regenerating, or reactivating
    • B01J20/32—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating
    • B01J20/3202—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating characterised by the carrier, support or substrate used for impregnation or coating
    • B01J20/3204—Inorganic carriers, supports or substrates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/30—Processes for preparing, regenerating, or reactivating
    • B01J20/32—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating
    • B01J20/3291—Characterised by the shape of the carrier, the coating or the obtained coated product
    • B01J20/3293—Coatings on a core, the core being particle or fiber shaped, e.g. encapsulated particles, coated fibers
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/28—Treatment of water, waste water, or sewage by sorption
    • C02F1/288—Treatment of water, waste water, or sewage by sorption using composite sorbents, e.g. coated, impregnated, multi-layered
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/006—Radioactive compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/20—Heavy metals or heavy metal compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2305/00—Use of specific compounds during water treatment
    • C02F2305/08—Nanoparticles or nanotubes

Definitions

  • the invention relates to a core-shell particle and a method for the separation of metallic cations from a liquid by means of corresponding core-shell particles.
  • the main problem here is the contamination with 137 Cs, a ß-emitter with a half-life of about 30 years.
  • An efficient extraction of 137 Cs ions and thus a qualitative and quantitative reduction of the radioactive waste is of enormous importance both ecologically and economically.
  • Radioactive Cesium Accumulation from Contaminated Wastewater investigated the use of cryptands adsorbed on porous surfaces with a defined crown ether-like structure (macrocyclic o-benzo-p-xylyl-22-crown-6-ether) to remove radioactive cesium from a liquid.
  • cryptands adsorbed on porous surfaces with a defined crown ether-like structure macrocyclic o-benzo-p-xylyl-22-crown-6-ether
  • the invention is as a first object to provide a way for easy, inexpensive and environmentally friendly removal of ecologically problematic metal cations from contaminated liquid.
  • the first object of the invention is achieved according to the invention by a core-shell particle, comprising a core containing a number of magnetic nanoparticles, and a core enclosing, designed as a monolayer shell, the shell of a hydrophilic matrix-forming matrix molecules and a Contains a number of different functionalized molecules, and wherein the functionalized molecules are integrated into the matrix such that the shell is formed with a three-dimensional cage structure for the selective binding of metallic cations.
  • the invention is based on their knowledge of the formation of complexes or coordination compounds.
  • complexation reactions cations are coordinated as central particles by ligands.
  • the complexation is carried out selectively depending on the central particle to be complexed, as well as the ligands available for complexing.
  • Core-shell systems or core-shell particles usually consisting of a monolayer enclosed core, depending on the nature and composition of the core and the shell, for example, as a filler, as a component of polymer preparations or adhesives, for the preparation of dispersions or also used for the immobilization of enzymes. In addition, they are, as described above, usable within limits for the complexation of ions.
  • the shell of the core-shell particle comprises a matrix molecule forming hydrophilic matrix, as well as functionalized molecules integrated into the matrix.
  • the functionalized molecules are in this case integrated into the matrix in such a way that together with the hydrophilic matrix Molecules a core enclosing shell is formed with a three-dimensional cage structure for the selective binding of metallic cations.
  • the hydrophilic matrix molecules furthermore allow a very good dispersibility of the core-shell systems in aqueous media.
  • the functionalized molecules are located between the matrix molecules on the particle surface and bound to the surface of the core and together with the matrix molecules form an ion-sensitive shell.
  • the functionalized molecules are located between the matrix molecules on the particle surface and bound to the surface of the core and together with the matrix molecules form an ion-sensitive shell.
  • concentration ratio of the respective molecules core-shell particles are provided, by means of which at least one species of metallic cations are complexed can.
  • the chemical structure of the shell forming molecules and their arrangement on the particle surface causes the formation of the three-dimensional cage structure.
  • the molecules are in this case immobilized on the surface, wherein the functionalized molecules are preferably randomly distributed on the surface, ie between the matrix molecules.
  • the binding of the cations takes place here by their complexation by means of the shell of the core-shell particles forming molecules.
  • the basic functionality of the core-shell particle ie its ability to complex metal cations, is determined by the matrix molecules forming the matrix.
  • the desired selectivity is achieved.
  • the core enclosing shell is formed as a monolayer.
  • the or each magnetic nanoparticle is in particular longer-chain due to the monolayer surrounding it, containing one or more different types of molecules Functionalized matrix molecules and functionalized molecules.
  • the monolayer is designed in particular as a self-assembled monolayer (SAM).
  • SAM self-assembled monolayer
  • Self-organization means here the independent arrangement of arbitrary components to defined structures and patterns.
  • a molecule which is part of such a monolayer usually consists of an anchor group, a molecular backbone and a terminal head group, ie a functional group.
  • the anchor group is used for chemical coupling to the substrate, in this case the core.
  • the molecular backbone determines the order and packing density of the molecules to each other.
  • the terminal head group of the respective molecules is responsible for their chemical functionality of the monolayer.
  • the layer thickness of the monolayer is preferably between 1 nm and 4 nm. More preferably, the monolayer layer thickness is between 2 nm and 3 nm. Depending on the composition, the monolayer is in the form of a pure or a mixed monolayer on the surface of the core or the corresponding monolayer Nanopumbles arranged.
  • the matrix molecules and the functionalized molecules function both as ligands for the complexation of metallic cations.
  • the nature of the cage structure is determined by the nature and arrangement of the ligands, their combination and arrangement on the surface, as well as by the average particle surface.
  • the desired ion sensitivity or the desired ion selectivity is determined by the choice and combination of suitable (functionalized) Molecules adjustable.
  • suitable (functionalized) Molecules adjustable in particular radioactive isotopes of metallic cations can be complexed, so that when using core-shell particles with a correspondingly structured shell, as described above, radioactive isotopes such as 137 Cs contaminated wastewater can be purified.
  • the core contains one or more permanently magnetic nanoparticles. Due to the small size, the or each nanoparticle is only weakly magnetic but reacts well to applied external magnetic fields.
  • the or each nanoparticle can - depending on the application of the core-shell particle - paramagnetic, diamagnetic, ferromagnetic or
  • Phosphonic acid derivatives which have high mechanical, thermal and chemical stability on oxidic surfaces are preferably used both as matrix molecules and as functionalized molecules.
  • Preferred matrix molecules are phosphonic acid derivatives of the general empirical formula R-PO (OR ' ) 2 , where R is selected from a group consisting of - (CH 2 ) n -CH 3 , - (CH 2 ) n - (O -CH 2 - CH 2) m -X, - (CH 2) n -NH 2, - (CH 2) n - NR "2, and - (CH 2) n - (S-CH 2 -CH 2) m -X, wherein R 'is selected from a group consisting of hydrogen, a methyl group and an ethyl group, wherein n is between 1 and 10 and m is between 1 and 5, wherein X is selected from a group consisting of -aryl , -COOH, -OH, -SH, and -COOR "and wherein R " is an alkyl radical.
  • the matrix molecules are bound to the surface of the nucleus via the anchor group -PO (OR ' ) 2 .
  • the molecular backbone R chains cause self-assembly of the matrix molecules within the monolayer and are different from one another depending on the cation being complexed.
  • phosphonic acid derivatives with alkyl chains having up to 24 carbon atoms are used as the backbone.
  • Alkyl chains are more preferably used in which one or more carbon atoms are protected by heteroatoms, such as Fei or oxygen are substituted.
  • heteroatoms such as Fei or oxygen are substituted.
  • the terminal head groups are preferably given by alkyl, aryl, -COOH, -OH, -SH, -COOR "and / or NR " 2 functions.
  • Functionalized molecules integrated into the matrix are particularly preferably functionalized phosphonic acid derivatives of the general empirical formula R-PO (OR ' ) 2 , where R is selected from a group consisting of - (CH 2 ) n -CH 3! - (CH 2 ) n -OH, - (CH 2 ) n -COOH, - (CH 2 ) n -SH, - (CH 2 ) n -Hal, - (CH 2 ) n -SO 2 OH, - (CH 2 ) n - NH 2 , - (CH 2 ) n -N 3, - (CH 2 ) n -CN, - (CH 2 ) n -phenyl, - (CH 2 ) n -OC 6 Hal 5 and (CF 2 ) n -CF 3 , where n is between 2 and 20, and wherein R 'is selected from a group consisting of hydrogen and alkyl groups, and wherein shark is selected from
  • the molecular backbone, ie the chains, are also different from one another depending on the cation to be complexed.
  • cations with smaller radii such as, for example, lead (Pb), cadmium (Cd), chromium (Cr) or titanium (Ti) cations, in particular functionalized phosphonic acid derivatives with alkyl chains - (CH 2 ) n with OH-, COOH , Hal, SO 2 OH, NH 2 , N 3 , CN, CH, phenyl, -OC 6 Hal 5 - and benzothiophene groups are used as preferred terminal head groups.
  • alkyl chains - (CH 2 ) with CH 3 - , OH-, COOH-, SH-, Br-, (CF 2 ) are preferably used.
  • the attachment of the (functionalized) phosphonic acid derivatives on the surface of the core via the respective phosphonic acid anchor groups is extremely stable compared to other anchor groups, such as carboxylic acids. This is, for example, from the work of Zeininger, L; Portiila, L; Halik, M. and Hirsch, A.; Quantitative Determination and Comparison of the Surface Binding of
  • the matrix molecules expediently form the main component of the shell of the core-shell particle.
  • the ratio of matrix molecules to functionalized molecules in the matrix is preferably in a range between 90:10 and 70:30. It is particularly advantageous if the ratio of matrix molecules to functionalized molecules in the monolayer is 75:25, ie 3: 1. At such a concentration or a corresponding ratio, a three-dimensional cage structure is formed within the monolayer.
  • the matrix molecules and the functionalized molecules have coordination sites for complexing metallic cations.
  • the coordination site here is understood to mean the atom or the functional group in the molecule which has one (or more) adhesive atoms with at least one free electron pair and can function as a ligand.
  • both the matrix molecules and the functionalized molecules act as ligands.
  • coordination compounds are formed with the cation as central particles and the corresponding (functionalized) phosphonic acid derivatives as ligands.
  • metallic cations are complexed by the matrix molecules and the functionalized molecules.
  • the cage structure has cavities within the shell. These cavities, ie cavities, are formed within the monolayer between the matrix molecules and the functionalized molecules. The size of the cavities here depends in particular on the matrix molecules used and / or the functionalized molecules used. If a core-shell particle is used with a shell containing phosphonic acid derivatives acting as a spacer, the three-dimensional cage structure is formed with cavities which are particularly suitable for accommodating metallic cations with a large radius, such as 137 Cs or 90 Sr.
  • the core comprises as magnetic nanoparticles metal oxides selected from a group consisting of iron oxides, ferrites and
  • Cobalt oxides exists. Such metal oxides have the desired magnetic properties, are inexpensive to acquire and easy to handle.
  • nanoparticles in the present case particles with a diameter of 1 nm to a few 100 nm, ie in a range of 1 * 10 "9 m to less than 1000 * 10 " 9 m, understood.
  • the diameter of the or each magnetic nanoparticle is preferably in a range between 10 and 200 nm. More preferably, the diameter is below 100 nm. Nanoparticles with diameters below 100 nm have a large ion-sensitive surface, which in highly contaminated liquids for the extraction of Impurities is necessary.
  • core-shell particles with diameters below 100 nm are particularly readily dispersible. The use of nanoparticles with diameters above 100 nm is advantageous if the corresponding core-shell particles are used in low-contaminated liquids.
  • the core shell particle comprises a non-magnetic oxide layer.
  • the nonmagnetic oxide layer encases one or more magnetic nanoparticles and together with the magnetic nanoparticle (s) forms the core of the core-shell particle.
  • This is an inorganic core-shell system.
  • the outer layer of the core that is to say the non-magnetic oxide layer, expediently binds the matrix molecules and the functionalized molecules.
  • the non-magnetic oxide layer preferably comprises oxides selected from a group consisting of aluminum oxides, silicon oxides and metallic mixed oxides having the general empirical formula Me 1 n Me 2 m O x .
  • oxides selected from a group consisting of aluminum oxides, silicon oxides and metallic mixed oxides having the general empirical formula Me 1 n Me 2 m O x .
  • a common example of this is the use of a core comprising iron and silicon dioxide (SiO 2 ).
  • Phosphorous acid derivatives are preferably one or more of the phosphonic acid derivatives described in FIGS. 2 and 3.
  • the use of such a core-shell particle is inexpensive and environmentally friendly.
  • the second object of the invention is achieved by a method for the separation of metallic cations from a liquid, wherein a metallic cation-containing liquid core-shell particles are added according to one of the embodiments described above, wherein the resulting mixture is mixed, wherein in the Mixture contained metallic cations are complexed in the three-dimensional cage structure of the shell of the core-shell particles to form core-shell hybrids, wherein the core-shell hybrid mixture containing a magnetic field is applied, the resulting core-shell hybrids are agglomerated in the liquid by the action of the external magnetic field, and the resulting core-shell hybrid agglomerates are removed from the liquid.
  • the metallic cations contained in the liquid are in this case complexed by the matrix molecules contained in the shell and the functionalized molecules within the three-dimensional cage structure of the monolayer-shaped shell of the respective core-shell particles.
  • the metallic cations are expediently taken up in cavities within the shell and complexed via coordination sites of the matrix molecules and the functionalized molecules.
  • the resulting core-shell hybrids, ie the core-shell particles with the complexed cations, are agglomerated by applying a magnetic field.
  • the agglomeration is expedient manner by permanent or electromagnet.
  • the exposure time ie the residence time of the core-shell particles in the liquid to be purified, depends in particular on the concentration of the metallic cations to be removed, on the amount of added core-shell nanoparticles, on the temperature and on the mixing.
  • FIG. 5 shows an exemplary representation of a further forming cage structure within the envelope
  • Liquid by selective removal of metallic cations contained in the liquid Liquid by selective removal of metallic cations contained in the liquid.
  • the matrix molecules shown in the following FIGS. 1 to 3 as well as the functionalized molecules in the present case show a selection of such molecules which are suitable for forming a shell enclosing the core of a core-shell particle.
  • a pure or a mixed monolayer can be formed on the surface of the core or of the corresponding nanoparticle.
  • Fig. 1 shows various matrix molecules 1 to 4, which may be contained in a core enclosing shell of a core-shell particle.
  • Each of the matrix molecules 1 to 4 is an oligoglycol phosphonic acid having the anchor group -PO (OH) 2 .
  • the molecular backbone ie the chain of oligoglycol phosphonic acids 1 and 2 has the general empirical formula - (CH 2 ) 2 -O- (CH 2 ) 2-O- (CH 2 ) 2-X, wherein the oligoglycol phosphonic acid 1 a OH group as terminal head group X, the oligoglycol phosphonic acid 2 has a CH 3 group as the terminal head group X.
  • the molecular backbone of oligoglycol phosphonic acids 3 and 4 has the general empirical formula - (CH 2 ) 6 -O- (CH 2 ) 2 -O- (CH 2 ) 2 -O- (CH 2 ) 2 -X.
  • the chains are therefore significantly longer than the chains of the oligoglycol phosphonic acids 1 and 2.
  • the oligoglycol phosphonic acid 3 also has an OH group as the terminal head group X.
  • the terminal head group of the oligoglycol phosphonic acid 4 has an OCH 3 group as the terminal head group X.
  • Such matrix molecules as part of a core-shell particle, form the main component of a shell that covers the core and forms a monolayer.
  • functionalized molecules are arranged and integrated into the matrix such that the shell is formed with a three-dimensional cage structure for the selective binding of metallic cations.
  • the functionalized molecules like the matrix molecules, are bound via their anchor group on the particle surface of the nucleus.
  • Fig. 2 various functionalized molecules 5 to 15 are shown. These are functionalized phosphonic acid derivatives, which are also bound via their anchor group -PO (OH) 2 at the surface of a nucleus between matrix molecules.
  • different metallic cations can be selectively bound or complexed.
  • FIG. 3 shows further functionalized phosphonic acid derivatives 6 to 23.
  • These functionalized molecules which are also bound by an anchor group -PO (OH) 2 at the surface of a nucleus between matrix molecules in the formation of a core-shell particle, are used as spacers To expand the three-dimensional cage and thus to make room for cations to be captured and complexed with large radii such as 137 Cs or 90 Sr
  • FIG. 4 schematically shows a section of a core-shell particle 31 in a plan view.
  • the core-shell particle 31 comprises a magnetic nanoparticles 33 as core 35, as well as a shell 37 enclosing the core 35.
  • the shell is formed as a monolayer 39 and comprises matrix molecules 41, which form a hydrophilic matrix 43, and into the matrix 43 integrated functionalized molecules 45.
  • the phosphonic acid derivatives 1 to 4 shown in FIG. 1 can be used as matrix molecules 41; as functionalized molecules 45, one of the functionalized phosphonic acid derivatives shown in FIGS. 2 and 3 can be used.
  • the shell 37, or the monolayer 39, is formed with a hexagonal, three-dimensional cage structure 47 for the selective binding of metallic cations.
  • a cell 49 of the cage structure 47 in this case comprises three matrix molecules 43 together with six oxygen molecules.
  • cavities 55 are formed within the monolayer between the matrix molecules 41 and the functionalized molecules 45.
  • the cavities 55 allow the absorption of metallic cations in contact with a contaminated liquid.
  • FIG. 5 shows, analogously to FIG. 4, a further core-shell particle 61, which likewise comprises a shell 69 comprising matrix molecules 63 and functionalized molecules 65, formed as a monolayer 67, which surrounds the core 71 of the core-shell particle. Particles 61 encloses. Again, the sheath 69 is formed with a hexagonal three-dimensional cage structure 73 for selective bonding of metallic cations. In contrast to FIG. 4, the ratio of matrix molecules 63 to functionalized molecules 65 according to FIG. 5 in monolayer 67 is 80:20.
  • Changing the ratio of matrix molecules 63 to functionalized molecules 65 in the shell 69 results in correspondingly different cage structures.
  • Particularly preferred is a shell or a monolayer with a ratio of matrix molecules to functionalized molecules of 75:25, ie 3: 1.
  • FIG. 6 shows in Figure 75 modified cage structures 76, 77, 78 used to trap Cs + cations.
  • the cage structure 76 is formed only of type 4 matrix molecules of FIG.
  • the cage structure 77 is also formed with type 4 matrix molecules as shown in FIG.
  • functionalized spacer molecules of type 17 according to FIG. 3 are integrated in between the matrix molecules.
  • the cage structure 78 consists of matrix molecules of the type 4 according to FIG. 1 and functionalized molecules of the type 13 according to FIG. 2.
  • Fig. 7 shows a schematic process flow 81 in the separation of metallic cations from a liquid.
  • the liquid 85 containing the 137 Cs ions cations 83 are added in solid form to a plurality of core-shell particles 87.
  • the cores 89 of the core-shell particles 87 each comprise a magnetic Fe 3 O nanoparticle 91, and an oligoglycol phosphonic acid PO (OH) 2 - (CH 2 ) 2-0- (CH 2 ) enclosing the core 89. 2 -0- (CH 2 ) 2 -CH 3 -containing shell 93.
  • the resulting mixture 95 is mixed, whereby the metallic cations 83 contained in the mixture 95 in the three-dimensional cage structure in the shell 93 of the core-shell particles 87 to form a number of core-shell Hybrids 97 are complexed.

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Abstract

L'invention concerne une particule coeur-écorce (31, 61, 87) composée d'un coeur (35, 71, 89), contenant un certain nombre de nanoparticules magnétiques (33, 91), ainsi que d'une écorce (37, 69, 93) réalisée sous la forme d'une monocouche (39, 67) et entourant le coeur (35, 71, 89), ladite écorce (37, 69, 93) comprenant des molécules de matrice (41, 63), formant une matrice hydrophile (43), ainsi qu'un certain nombre de molécules (45, 65) fonctionnalisées différentes, lesdites molécules fonctionnalisées (45, 65) étant intégrées à la matrice (43), de telle sorte que l'écorce (37, 69, 93) présente une structure en cage tridimensionnelle (47, 73, 76, 77, 78) permettant la liaison sélective de cations métalliques (83). L'invention concerne également un procédé pour séparer les cations métalliques (63) présents dans un liquide (65), procédé selon lequel des particules coeur-écorce correspondantes (31, 61, 87) sont utilisées.
PCT/EP2016/066050 2016-07-06 2016-07-06 Particule coeur-écorce Ceased WO2018006958A1 (fr)

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Cited By (2)

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US20210308656A1 (en) * 2018-12-17 2021-10-07 Huizhou University Yolk/Shell-Type CoxCu1-xCo2O4@CoyCu1-yCo2O4 Catalyst as well as Preparation Method and Application thereof to Catalytic Hydrogen Generation
DE102021200731A1 (de) 2021-01-27 2022-07-28 Marcus Halik Kern-Hülle-Partikel

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US20210308656A1 (en) * 2018-12-17 2021-10-07 Huizhou University Yolk/Shell-Type CoxCu1-xCo2O4@CoyCu1-yCo2O4 Catalyst as well as Preparation Method and Application thereof to Catalytic Hydrogen Generation
US12370530B2 (en) * 2018-12-17 2025-07-29 Huizhou University Yolk/shell-type CoxCu1-xCo2O4@CoyCu1-yCo2O4 catalyst as well as preparation method and application thereof to catalytic hydrogen generation
DE102021200731A1 (de) 2021-01-27 2022-07-28 Marcus Halik Kern-Hülle-Partikel
WO2022161800A1 (fr) 2021-01-27 2022-08-04 Marcus Halik Particule noyau-enveloppe

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