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Supergravity preparation method of cysteine modified magnetic nano-material

A cysteine, magnetic nanotechnology, applied in the direction of magnetic materials, magnetic objects, inorganic materials, etc., can solve the problems of lack of low-cost macro-engineering amplification, and achieve low preparation cost, small particle size, and preparation method. simple effect

Active Publication Date: 2016-04-06
ZHONGBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods for preparing cysteine-modified magnetic nanomaterials lack the characteristics of engineered scale-up for low-cost macrofabrication.

Method used

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  • Supergravity preparation method of cysteine modified magnetic nano-material
  • Supergravity preparation method of cysteine modified magnetic nano-material
  • Supergravity preparation method of cysteine modified magnetic nano-material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A hypergravity preparation method for cysteine-modified magnetic nanomaterials, comprising the steps of:

[0022] (1) FeCl 2 4H 2 O and FeCl 3 ·6H 2 O, according to the molar ratio of 1:1.9, the iron salt solution with a cation concentration of 0.5mol / L was prepared; in addition, according to Fe 3+ and OH - The molar ratio is 1:6 to prepare sodium hydroxide aqueous solution; preheat the above-mentioned iron salt mixed solution and lye to 80°C, adjust the volume flow rate of the two raw material liquids to 60L / h through the flowmeter, and pump the The two raw material liquids enter the impinging flow-rotating packed bed from the liquid distributor at the same time, and react in the supergravity field to obtain Fe 3 o 4 Magnetic nanoparticles, control the rotation speed of the hypergravity reactor to be 1000rpm. (2) the Fe prepared by the above (1) 3 o 4 The suspension of magnetic nanoparticles is collected in a stirred tank, the pH value of the solution is adjus...

Embodiment 2

[0025] A hypergravity preparation method for cysteine-modified magnetic nanomaterials, comprising the steps of:

[0026] (1) Mn(NO 3 ) 2 , Fe 2 (SO 4 ) 3 According to the molar ratio of 1:1.5, a metal salt solution with a cation concentration of 0.05mol / L is prepared; in addition, according to Fe 3+ and OH - The molar ratio is 1:8 to prepare ammonia solution; preheat the above metal salt mixed solution and lye to 25°C, adjust the volume flow rate of the two raw material liquids to 20L / h through the flowmeter, and pump the two kinds of raw materials respectively The raw material liquid enters the rotating packed bed from the liquid distributor at the same time, and reacts in the supergravity field to obtain MnFe 2 o 4 Magnetic nanoparticles, control the rotation speed of the hypergravity reactor to be 100rpm. (2) the MnFe prepared by the above (1) 2 o 4 The suspension of magnetic nanoparticles is collected in a stirred tank, the pH value of the solution is adjusted to...

Embodiment 3

[0028] A hypergravity preparation method for cysteine-modified magnetic nanomaterials, comprising the steps of:

[0029] (1) Ni(PO 4 ) 2 , Fe(NO 3 ) 3 According to the molar ratio of 1:2, a metal salt solution with a cation concentration of 0.75mol / L is prepared; in addition, according to Fe 3+ and OH - The molar ratio is 1:4 to prepare sodium hydroxide aqueous solution; preheat the above metal salt mixed solution and lye to 40°C, adjust the volume flow rate of the two raw material solutions to 80L / h through the flow meter, and pump the The two raw material liquids enter the spiral channel type rotating bed from the liquid distributor at the same time, and react in the supergravity field to obtain NiFe 2 o 4 Magnetic nanoparticles, control the rotation speed of the hypergravity reactor to be 2500rpm. (2) NiFe prepared by the above (1) 2 o 4 The suspension of magnetic nanoparticles is collected in a stirred tank, the pH value of the solution is adjusted to 4.0~5.0, and...

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Abstract

The invention belongs to the technical field of inorganic chemical functional magnetic nano-materials, and provides a supergravity preparation method of a cysteine modified magnetic nano-material. The supergravity preparation method comprises the following steps: continuously feeding a metal salt solution and an alkali liquor into a supergravity reactor to carry out a co-precipitation reaction; after the reaction is finished, collecting the reaction product of magnetic nano-particles into a stirring kettle; dropwise adding a cysteine water solution; stirring for a reaction, and then magnetically separating the reaction product; repeatedly washing with deionized water and absolute ethyl alcohol until to neutral; and carrying out vacuum drying to obtain the cysteine modified magnetic nano-material. The material has the characteristics of simple technology, short reaction time, low cost and large-scale production; the prepared cysteine modified magnetic nano-material is small in grain diameter and uniform in dispersion, and is easy for industrial enlarged production; and compared with a conventional method, the efficiency can be improved by 4-20 times, and the application field of magnetic separation technology in water treatment is expanded. The synthetic material can be expected to be widely applied to the fields of sewage treatment, heavy metal detection, magnetic catalysis, magnetic recording, biomedicine and the like.

Description

technical field [0001] The invention belongs to the technical field of inorganic chemical engineering functionalized magnetic nanometer materials, and in particular relates to a method for preparing cysteine-modified magnetic nanometer materials under high gravity. Background technique [0002] As a special nanomaterial, magnetic nanomaterials not only have the basic characteristics of conventional nanomaterials, such as size effect, surface effect, quantum effect and macroscopic quantum tunneling effect, but also have special magnetic properties. , chemistry and other aspects show special properties different from conventional materials. In recent years, magnetic nanomaterials have been widely used in environmental protection, chemical industry, electronics, medicine and other fields. At the same time, because of their magnetic properties, they can be used for magnetic separation to achieve rapid recovery, and can also be used as adsorbent materials. However, due to the ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/11H01F1/36C01G49/08C01G53/00C01G51/00
CPCC01G49/08C01G51/00C01G53/00C01P2002/72C01P2002/82C01P2004/04C01P2004/38C01P2004/64C01P2006/42H01F1/0045H01F1/112H01F1/36
Inventor 刘有智范红蕾焦纬洲祁贵生袁志国申红艳高璟栗秀萍张巧玲罗莹
Owner ZHONGBEI UNIV
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