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Magnetic nano material with carbon shell layer and preparation method thereof

A magnetic and carbon shell technology is applied in the field of magnetic nanosphere materials and their rapid preparation, which can solve the problems of complex preparation process and long preparation time, and achieve the effects of increasing specific surface area, reducing separation cost and good application prospect.

Inactive Publication Date: 2014-02-26
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, if the solvothermal method is used on superparamagnetic Fe 3 o 4 The surface of the core is covered with a carbon shell, the preparation process is more complicated, and the preparation time is longer

Method used

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  • Magnetic nano material with carbon shell layer and preparation method thereof
  • Magnetic nano material with carbon shell layer and preparation method thereof
  • Magnetic nano material with carbon shell layer and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0023] (1) Weigh 16.2g FeCl 3 ·6H 2 O was dissolved in 83.8g deionized water to make a solution, and 4.9g of sodium acetate was weighed and dissolved in 45.1g of ethylene glycol to make a solution. The temperature of the water bath was 40°C and the stirring condition was added dropwise to the N 2 In the protected reactor, after the dropwise addition, the mixed solution was put into an autoclave, crystallized at 180°C for 5 hours, then cooled naturally, washed with deionized water and ethanol three times, and dried in vacuum at 60°C for 8 hours. The obtained magnetic Fe 3 o 4 particles.

[0024] (2) Weigh the prepared magnetic Fe 3 o 4 Add 11.6g of granules to 38.4g of ethanol, and add 19g of glucose solution with a mass concentration of 10% and 10g of NaOH solution with a mass concentration of 10% at the water bath temperature of 50°C under stirring conditions. Stir for 3 hours, then sonicate for 50min under 150W ultrasonic power to complete Fe 3 o 4 The process of coa...

Embodiment 2

[0026] (1) Weigh 18.9g FeCl 3 ·6H 2 O was dissolved in 81.1g of deionized water to make a solution, and 5.7g of sodium acetate was weighed and dissolved in 44.3g of ethylene glycol to make a solution, which was added dropwise at a water bath temperature of 40°C under stirring conditions 2 In the protected reactor, after the dropwise addition, the mixed solution was put into an autoclave, crystallized at 180°C for 5 hours, then cooled naturally, washed with deionized water and ethanol three times, and dried in vacuum at 60°C for 8 hours. The obtained magnetic Fe 3 o 4 particles.

[0027] (2) Weigh the prepared magnetic Fe 3 o 4 Add 13.9 g of granules to 36.1 g of ethanol, and simultaneously add 12 g of glucose solution with a mass concentration of 20% and 6 g of NaOH solution with a mass concentration of 20% at a water bath temperature of 50°C under stirring conditions. Stir for 3 hours, then ultrasonicate for 30min under 200W ultrasonic power to complete Fe 3 o 4 The p...

Embodiment 3

[0029] (1) Weigh 24.3g FeCl 3 ·6H 2 O was dissolved in 75.7g of deionized water to make a solution, 7.4g of sodium acetate was weighed and dissolved in 42.6g of ethylene glycol to make a solution, and the solution was added dropwise at a water bath temperature of 40°C under stirring conditions 2 In the protected reactor, after the dropwise addition, the mixed solution was put into an autoclave, crystallized at 180°C for 5 hours, then cooled naturally, washed with deionized water and ethanol three times, and dried in vacuum at 60°C for 8 hours. The obtained magnetic Fe 3 o 4 particles.

[0030] (2) Weigh the prepared magnetic Fe 3 o 4 Add 12.7g of granules to 37.3g of ethanol, and add 20g of starch solution with a mass concentration of 15% and 5.4g of a NaOH solution with a mass concentration of 30% at the same time at a water bath temperature of 50°C under stirring conditions. After the addition is completed, Thoroughly stir for 3 hours, then ultrasonicate for 40min unde...

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Abstract

The invention relates to a magnetic nano material with a carbon shell layer and a preparation method thereof, and belongs to the technical field of magnetic nano materials. The preparation method comprises the following steps: adopting FeCl3.6H2O to prepare a superparamagnetic Fe3O4 core; by taking cheap glucose (or starch or a mixture of hydroquinone and formaldehyde) and the like as carbon sources for coating the carbon shell layer on the surface of the superparamagnetic Fe3O4 core, rapidly generating a layer of precursor which can form the carbon shell layer on the surface of the superparamagnetic Fe3O4 core by adopting an ultrasonic method, and finally roasting under the protection of N2 to prepare magnetic a C@Fe3O4 nano ball with the carbon shell layer. According to the method, the preparation time of the magnetic C@Fe3O4 nano ball with the carbon shell layer can be greatly shortened, and the prepared magnetic C@Fe3O4 nano ball with the carbon shell layer can not only be used as a carrier of a magnetic catalyst, but also has potential application value in the aspects of adsorption, separation, biomedicine and the like.

Description

technical field [0001] The invention relates to a magnetic nanosphere material with a carbon shell and a rapid preparation method thereof, belonging to the technical field of magnetic nanomaterials. Background technique [0002] Magnetic nanomaterials are widely used in magnetic fluids, microwave absorption, adsorption and removal of water pollutants, precious metal recovery, catalysis, targeted drug delivery carriers, biological protein separation, etc. (Ji Junhong, Ji Shengfu, Yang Wei, Li Chengyue. Magnetic Fe 3 o 4 Preparation and application of nanocrystals. Advances in Chemistry, 2010,22(8):1566-1574), such as superparamagnetic Fe 3 o 4 Cu / Fe prepared for nuclei 3 o 4 SiO 2 Magnetic catalyst, which can realize the catalytic conversion of low concentration formaldehyde to hydrogen production (Junhong Ji, Penghui Zeng, Shengfu Ji, Wei Yang, Hongfei Liu, Yingyi Li. Catalytic activity of core–shell structured Cu / Fe 3 o 4 SiO 2 microsphere catalysts.Catalysis Today,...

Claims

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Application Information

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IPC IPC(8): B01J13/02C01B31/02C01G49/08B01J32/00C01B32/15
Inventor 季生福杨浩张丹妮刘雪菲
Owner BEIJING UNIV OF CHEM TECH
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