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Preparation method of magnetic carbon nanocages

A nano-cage and magnetic carbon technology, which is applied in the direction of magnetic materials, magnetic objects, and the magnetism of inorganic materials, can solve the problems of unfavorable material entry and exit, inability to be used as nano-reactors, unfavorable drug loading, etc., to achieve low preparation costs and facilitate rapid Effect of transmission, excellent cycle stability

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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, carbon-coated Fe3O4 composites have been reported, but there is no gap between the carbon layer and the Fe3O4 core, which is not conducive to drug loading, and cannot be used as a nanoreactor, etc.
Even if there is a nano-gap, there is no mesopore on the surface of the carbon layer, which is not conducive to the entry and exit of substances, such as the slow release of drugs, the penetration of electrolytes, etc.

Method used

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  • Preparation method of magnetic carbon nanocages
  • Preparation method of magnetic carbon nanocages
  • Preparation method of magnetic carbon nanocages

Examples

Experimental program
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Effect test

Embodiment 1

[0039] 1. Preparation of Fe 3 o 4 ball:

[0040] 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.

[0041] 2. Preparation of Fe 3 o 4 @SiO 2 @Cball:

[0042] Mix 60 ml of ethanol, 15 ml of deionized water and 3 ml of ammonia water, and mix 0.3 g Fe 3 o 4 The spheres are dispersed into the mixed solution to obtain Fe 3 o 4 of the mixture.

[0043] Add 0.3 g tetraethyl orthosilicate (TEOS) dropwise to Fe 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 to obtain Fe with core-shell structure 3 o 4 @SiO 2 Nanosphere reaction system.

[0044] Add 0.5 ml...

Embodiment 2

[0050] 1. Preparation of Fe 3 o 4 ball:

[0051] 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.

[0052] 2. Preparation of Fe 3 o 4 @SiO 2 @Cball:

[0053] 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 are dispersed into the mixed solution to obtain Fe 3 o 4 of the mixture.

[0054] Add 0.6 g tetraethyl orthosilicate (TEOS) dropwise to Fe 3 o 4 In the mixed solution, stir mechanically at room temperature and react for 15 min to form a core-shell structure of Fe 3 o 4 @SiO 2 Nanospheres to obtain Fe with core-shell structure 3 o 4 @SiO 2 Nanosphere reaction system.

[0055] Immediatel...

Embodiment 3

[0061] 1. Preparation of Fe 3 o 4 ball:

[0062] 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.

[0063] 2. Preparation of Fe 3 o 4 @SiO 2 @Cball:

[0064] Mix 150 ml of ethanol, 60 ml of deionized water and 3 ml of ammonia water, and mix 0.3 g Fe 3 o 4 The spheres are dispersed into the mixed solution to obtain Fe 3 o 4 of the mixture.

[0065] 3 g of tetraethyl orthosilicate (TEOS) was slowly added dropwise to Fe 3 o 4 In the mixed solution, stir mechanically at room temperature, react for 20 min, and form the core-shell structure of Fe 3 o 4 @SiO 2 Nanospheres to obtain Fe with core-shell structure 3 o 4 @SiO 2 Nanosphere reaction system.

[...

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Abstract

The invention discloses a preparation method of magnetic carbon nanocages, and belongs to the technical field of nano material production. Fe<3>O<4> nanoballs are used as templates and magnetic inner cores, the inner surfaces of the nanoballs are coated with SiO<2> and resorcinol-formaldehyde resin, and the magnetic carbon nanocages are formed after high-temperature calcination and etching. The structure of the product is characterized in that the inner cores are magnetic, and migration of the carbon nanocages can be achieved under an external magnetic field; the outer walls are mesoporous carbon walls, and ions and small molecules can enter the interiors through the outer walls; large gaps exist between the inner cores and the outer walls, and the gaps can load pharmaceutical molecules and catalysts and can also be used as organic reaction sites. Therefore, the magnetic carbon nanocages of an egg yolk-eggshell structure are a catalyst carrier, a sustained-release drug carrier, a micro-nano reactor and a lithium-ion battery electrode material with broad application prospects.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial production, and in particular relates to a preparation process of magnetic carbon nanocage nanomaterials. Background technique [0002] Among transition metal oxides, Fe 3 o 4 Because of its advantages of magnetism, environmental friendliness, low cost and abundant resources, it is considered to be the most practical catalyst and drug-targeted carrier, lithium-ion battery anode material, etc. [0003] At present, carbon-coated Fe3O4 composites have been reported, but there is no gap between the carbon layer and the Fe3O4 core, which is not conducive to drug loading and cannot be used as a nanoreactor. Even if there is a nano-gap, there is no mesopore on the surface of the carbon layer, which is not conducive to the entry and exit of substances, such as the slow release of drugs and the penetration of electrolytes. Contents of the invention [0004] In view of the defects in the above pri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/00H01F1/34
CPCH01F1/0054H01F1/344
Inventor 陈铭李文龙张秀娥吴倩卉赵荣芳沈超周克寒
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