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Preparing method of hollow magnetic carbon nanospheres with MOFs growing inside in confinement mode

A technology of magnetic carbon and nanospheres, applied in the manufacture of magnetic materials, magnetic objects, inductors/transformers/magnets, etc., can solve the problems of small size, non-magnetic MOFs, poor stability, etc., to improve catalytic performance and morphology. Uniform and stable structure

Active Publication Date: 2017-12-15
YANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, MOFs materials are not conductive, which limits their application in the field of electrochemistry
The small size of MOFs materials makes it difficult to separate them from the reaction system
The stability of MOFs materials in strong acid and strong alkaline solvents is poor, which will cause the decomposition of MOF. When used as adsorbents, catalysts, catalyst carriers, drug sustained release carriers or lithium-ion battery electrode materials, the stability of the materials cannot be obtained. ensure
In addition, MOFs materials are not magnetic, cannot move directional in a magnetic field, and cannot be magnetically separated from a reaction system

Method used

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  • Preparing method of hollow magnetic carbon nanospheres with MOFs growing inside in confinement mode
  • Preparing method of hollow magnetic carbon nanospheres with MOFs growing inside in confinement mode
  • Preparing method of hollow magnetic carbon nanospheres with MOFs growing inside in confinement mode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] 1. Preparation of magnetic carbon nanocages:

[0043] 3.6 g FeCl 3 ·6H 2 O, 90 ml of ethylene glycol, 10 ml of ethanol and 2.4 g of sodium acetate were mixed, mechanically stirred at room temperature for 30 min, the mixed solution was transferred to a reactor, and hydrothermally reacted at 200 °C for 10 h. After the reaction was completed, it was washed by centrifugation and dried to obtain 200 nm Fe 3 o 4 ball.

[0044] Mix 75 ml of ethanol, 30 ml of deionized water and 3 ml of ammonia water, and mix 0.3 g Fe 3 o 4 The spheres were dispersed into the mixed solution; 0.6 g tetraethylorthosilicate (TEOS) was added dropwise at a constant speed to the 3 o 4 In the mixed solution, stir mechanically at room temperature and react for 10 min to form a core-shell structure of Fe 3 o 4 @SiO 2 nanospheres.

[0045] 1 ml of formaldehyde solution and 0.5 g of resorcinol were added to the above reaction system, and the reaction was carried out under mechanical stirring fo...

Embodiment 2

[0054] 1. Preparation of magnetic carbon nanocages:

[0055] 3.6 g FeCl 3 ·6H 2 O, 90 ml of ethylene glycol, 10 ml of ethanol and 2.4 g of sodium acetate were mixed, mechanically stirred at room temperature for 30 min, the mixed solution was transferred to a reactor, and hydrothermally reacted at 200 °C for 10 h. After the reaction was completed, it was washed by centrifugation and dried to obtain 200 nm Fe 3 o 4 ball.

[0056] Mix 75 ml of ethanol, 30 ml of deionized water and 3 ml of ammonia water, and mix 0.3 g Fe 3 o 4 The spheres were dispersed into the mixed solution; 0.6 g tetraethylorthosilicate (TEOS) was added dropwise at a constant speed to the 3 o 4In the mixed solution, stir mechanically at room temperature and react for 10 min to form a core-shell structure of Fe 3 o 4 @SiO 2 nanospheres.

[0057] 1 ml of formaldehyde solution and 0.5 g of resorcinol were added to the above reaction system, and the reaction was carried out under mechanical stirring for...

Embodiment 3

[0066] 1. Preparation of magnetic carbon nanocages:

[0067] 3.6 g FeCl 3 ·6H 2 O, 90 ml of ethylene glycol, 10 ml of ethanol and 2.4 g of sodium acetate were mixed, mechanically stirred at room temperature for 30 min, the mixed solution was transferred to a reactor, and hydrothermally reacted at 200 °C for 10 h. After the reaction was completed, it was washed by centrifugation and dried to obtain 200 nm Fe 3 o 4 ball.

[0068] Mix 75 ml of ethanol, 30 ml of deionized water and 3 ml of ammonia water, and mix 0.3 g Fe 3 o 4 The spheres were dispersed into the mixed solution; 0.6 g tetraethylorthosilicate (TEOS) was added dropwise at a constant speed to the 3 o 4 In the mixed solution, stir mechanically at room temperature and react for 10 min to form a core-shell structure of Fe 3 o 4 @SiO 2 nanospheres.

[0069] 1 ml of formaldehyde solution and 0.5 g of resorcinol were added to the above reaction system, and the reaction was carried out under mechanical stirring fo...

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Abstract

The invention belongs to the technical field of nano material production, and relates to a preparing method of hollow magnetic carbon nanospheres with MOFs growing inside in a confinement mode. The preparing method includes the steps that FeCl3.6H2O, ethylene glycol, ethyl alcohol and sodium acetate are mixed and subjected to hydrothermal reaction to obtain Fe3O4 spheres, the Fe3O4 spheres, ethyl alcohol, deionized water and ammonia water are mixed to obtain Fe3O4 sphere mixed solution, a silicon source is added dropwises into the Fe3O4 sphere mixed solution to react, then resorcinol and formaldehyde are added to react so as to obtain Fe3O4@SiO2@ resorcinol-formaldehyde resin spheres, Fe3O4@SiO2@C spheres are obtained after calcining under argon and etched by sodium hydroxide water solution to obtain magnetic carbon nanocages; finally the magnetic carbon nanocages react with metallic nitrate and 2-methylimidazole to obtain the hollow magnetic carbon nanospheres which are uniform in size and are distributed uniformly, the morphology of the hollow magnetic carbon nanospheres is controlled well, and the MOFs of the hollow magnetic carbon nanospheres grow inside in the confinement mode. The process is simple, and the materials needed in the reaction process are low in toxicity and harmless.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial production, and in particular relates to a technique for confining and growing MOFs inside a magnetic nanocage. Background technique [0002] Metal-organic frameworks (MOFs) are coordination polymers that have developed rapidly in the past decade. They refer to crystalline porous materials with periodic network structures formed by self-assembly of transition metal ions and organic ligands. It has the advantages of high porosity, low density, large specific surface area, regular pore channels, adjustable pore size, diversity of topology and tailorability, etc. It has a three-dimensional pore structure, generally with metal ions as connection points, supported by organic ligands. Constituting a 3D extension of space, it is another important new type of porous material besides zeolite and carbon nanotubes, which are widely used in catalysis, energy storage and separation. At present, MOFs have...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/00H01F41/00
CPCH01F1/0054H01F41/00
Inventor 陈铭李文龙周克寒张秀娥姜晖吴倩卉赵荣芳
Owner YANGZHOU UNIV
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