Magnetic nano-pore metal-organic framework core-shell material preparation, functionalized design, and application.

An organic framework and magnetic nanotechnology, applied in the field of synthesis of magnetic core-shell materials

Inactive Publication Date: 2013-07-17
ANHUI UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Recently, scientists have paid more and more attention to the design research based on the core-shell structure of nanoporous metal-organic framework materials. reported a core-shell structure with a metal-organic framework material as the core and silica as the shell; A core-shell structure in which a metal-organic framework material is the core and another metal-organic framework material is the shell; Li G.T. et al. reported on pages 10094-10096 of Volume 47, Issue 36, 2011 of Chemical Communication Polystyrene microspheres as the core and metal-organic framework materials as the shell core-shell structure, but there is no report on the magnetic core-shell structure based on nanoporous metal-organic framework materials

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  • Magnetic nano-pore metal-organic framework core-shell material preparation, functionalized design, and application.
  • Magnetic nano-pore metal-organic framework core-shell material preparation, functionalized design, and application.
  • Magnetic nano-pore metal-organic framework core-shell material preparation, functionalized design, and application.

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Experimental program
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Embodiment 1

[0041] Magnetic Fe 3 o 4 The nanosphere core was synthesized with reference to the method provided by Zhao D.Y. et al. in Advanced Materials 2009, Volume 21, pages 1377-1382. Weigh 1.73g of ferric chloride hexahydrate, dissolve it in 35mL of ethylene glycol, and stir it magnetically. After it is completely dissolved, add 3.83g of sodium acetate trihydrate, continue stirring for 30 minutes, and then transfer the entire solution into an autoclave. After reacting at 200 degrees Celsius for 8 hours, cool to room temperature, and separate the precipitate by adding an external magnet. The prepared black product was washed with a large amount of distilled water, and then washed with absolute ethanol, and then dispersed in absolute ethanol for storage. The obtained product morphology is characterized by a scanning electron microscope, and its diameter is 400-700nm (see figure 1 ).

[0042] Weigh the Fe prepared above 3 o 4 Add 0.05g of nanospheres to 10mL of a prepared ethanol so...

Embodiment 2

[0045] The Fe of the mercaptoacetic acid modification prepared in embodiment 1 3 o 4 Nanospheres are separated by a magnet, add 4mL prepared 10mmol / L copper acetate monohydrate ethanol solution, soak for 15 minutes at 70 degrees Celsius, separate with a magnet, wash with absolute ethanol, and then add 4mL prepared 10mmol / L Trimellitic acid ethanol solution, after 30 minutes, separated with a magnet, washed with absolute ethanol, and obtained a layer of Cu 3 (BTC) 2 Skeleton core-shell material, the above process is repeated to prepare magnetic core-shell microspheres with different coating layers, and then put the product into a drying oven at 150 degrees Celsius for 10 hours to dry. The prepared product is characterized by powder X-ray diffraction method, and the product contains Fe 3 o 4 and nanoporous metal-organic framework phase [Cu 3 (BTC) 2 (H 2 O) 3 ] n ; product morphology through scanning electron microscopy (see Figure 6 ) and transmission electron micros...

Embodiment 3

[0047] The Fe of the mercaptoacetic acid modification prepared in embodiment 1 3 o 4 The nanospheres are separated by a magnet, add 4mL of a prepared 10mmol / L ferric chloride hexahydrate ethanol solution, after 15 minutes, separate with a magnet, wash with absolute ethanol, and then add 4mL of a prepared 10mmol / L trimesic acid Ethanol solution, after 30 minutes, separated by magnet, washed with absolute ethanol, obtained a layer of MIL-100 (Fe) skeleton core-shell material, and the above process was repeated to prepare magnetic core-shell microspheres with different layers of coating. The temperature of the reaction was controlled at 25 degrees Celsius, and then the product was put into a drying oven and dried at 150 degrees Celsius for 10 hours. The prepared product is characterized by powder X-ray diffraction method, and its structure is except containing Fe3O4 phase, also contains the nanoporous metal-organic framework material MIL-100 (Fe) phase (see Figure 8 ); the mor...

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Abstract

The invention provides a preparation method and a functionalized design method of a novel magnetic nano-pore metal-organic framework core-shell material preparation, and an application of the material in heavy metal ion selective removing and targeted drug loading. With a layered self-assembly method, the magnetic core-shell material with a magnetic material as a core and a nano-pore metal-organic framework as a shell is prepared, wherein the thickness of the nano-pore metal-organic framework shell layer can be effectively regulated through changing self-assembly conditions. The invention also provides a method for carrying out thiol functional design upon the magnetic nano-pore metal-organic framework material, and a method for carrying out organic and/or inorganic surface modification upon the surface of the nano-pore metal-organic framework magnetic core-shell material. The nano-pore metal-organic framework magnetic core-shell material provided by the invention can be used as an absorption material and a catalytic material, a heavy metal ion selective absorption and separation material, and a targeted drug loading carrier.

Description

technical field [0001] The invention belongs to a synthesis method and a functionalization method of a magnetic core-shell material with controllable thickness of the shell layer formed by a metal-organic framework material with nanoholes as the shell and a magnetic material as the core, and its properties in adsorption, Applications in the fields of catalysis, selective removal of heavy metal ions, and targeted drug loading. Background technique [0002] Nanoporous metal-organic framework materials are zeolite-like porous materials that self-assemble into periodic spatial network structures through coordination bonds between abundant and diverse organic ligands and transition metal ions. Due to the simple and easy-to-obtain raw materials, the material has the advantages of large specific surface area, regular pore channels and adjustable pore diameter, simple synthesis method, mild preparation conditions, and functional modification according to requirements, making it suit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/02B01J20/22B01J20/28B01J20/30C02F1/28C02F1/62C02F1/00B01J31/22B01J31/28B01J31/34B01J35/10
Inventor 裘灵光柯飞姜霞
Owner ANHUI UNIVERSITY
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