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Method for preparing graphene magnetic nanometer composite materials

A magnetic nano-composite material technology, applied in chemical instruments and methods, medical preparations with inactive ingredients, pharmaceutical formulations, etc., can solve the problems of easy failure and weak bonding of composite materials, and achieve easy separation and less environmental pollution. , the effect of simple operation

Inactive Publication Date: 2012-09-19
HUBEI FORBON TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although electrostatic self-assembly is easy to operate and does not require the addition of coupling agents, the combination is not strong and the composite material is prone to failure

Method used

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  • Method for preparing graphene magnetic nanometer composite materials
  • Method for preparing graphene magnetic nanometer composite materials
  • Method for preparing graphene magnetic nanometer composite materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] 1) 3.135g Fe·Cl 2 4H 2 O, 8.514g FeCl 3 ·6H 2 O was added to 100 mL of water, mixed with 12.7 mL of NaOH solution with a concentration of 10 mol / L, stirred at room temperature for 1 h, transferred to a water bath at 90°C and continued to stir for 1 h, added 0.33 mL of concentrated nitric acid with a mass concentration of 69.8%, continued to stir for 0.5 h, and then Add 50 mL of 0.3 mol / L sodium citrate solution, stir for 0.5 h, wash with absolute ethanol for 3 times after cooling, separate and collect the product Fe 3 o 4 And put it in an oven at 80°C to dry for later use;

[0020] 2) Mix 160mL of absolute ethanol and 40mL of water, add 0.1g of Fe prepared in step 1) 3 o 4 , mixed and stirred, adding 5mL of ammonia water with a mass concentration of 30%, the above solution was ultrasonically treated with a power of 100W for 1h to clarify, and 500μL of 3-aminopropyltriethoxysilane was added dropwise while stirring, and used after 12h of reaction Wash with absolute...

Embodiment 2

[0024] 1) 3.00g FeCl 2 4H 2 O, 10.00g FeCl 3 ·6H 2 O was added to 150 mL of water, mixed with 15.0 mL of NaOH solution with a concentration of 20 mol / L, stirred at room temperature for 3 h, transferred to a water bath at 65°C and continued to stir for 3 h, added 0.3 mL of concentrated nitric acid with a mass concentration of 69.8%, continued to stir for 2 h, and then Add 100 mL of 0.5 mol / L sodium citrate solution, stir for 2 hours, wash with absolute ethanol for 5 times after cooling, separate and collect Fe 3 o 4 And put it in an oven at 80°C to dry for later use;

[0025] 2) Mix 200mL of absolute ethanol and 50mL of water, add 0.3g of Fe prepared in step 1) 3 o 4 , mix and stir, add 10mL of ammonia water with a mass concentration of 20%, and ultrasonically treat the above solution with a power of 80W for 3h until clarified, add 800μL tetraethoxysilane dropwise while stirring, and wash it with absolute ethanol for 4 times after reacting for 18h , separate and collect ...

Embodiment 3

[0029] 1) 5.00g FeCl 2 4H 2 O, 8.00g FeCl 3 ·6H 2O was added to 200 mL of water, mixed with 12.0 mL of NaOH solution with a concentration of 30 mol / L, stirred at room temperature for 5 h, transferred to a water bath at 60°C and continued to stir for 5 h, added 1.0 mL of concentrated nitric acid with a mass concentration of 69.8%, continued to stir for 3 h, and then Add 150 mL of 1.0 mol / L sodium citrate solution, stir for 3 h, wash with absolute ethanol for 4 times after cooling, and separate the collected product Fe 3 o 4 And put it in an oven at 80°C to dry for later use;

[0030] 2) Mix 150mL of absolute ethanol and 30mL of water, add 0.5g of Fe prepared in step 1) 3 o 4 , mix and stir, add 8 mL of ammonia water with a mass concentration of 40%, and ultrasonically treat the above solution with a power of 50W for 5 hours until clarification, add 1000 μL of polyethyleneimine dropwise while stirring, and wash it with absolute ethanol for 5 times after reacting for 48 hou...

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Abstract

The invention discloses a method for preparing graphene magnetic nanometer composite materials composed by graphene and ferroferric oxide (Fe3O4), which comprises the steps that 1 magnetic nanoparticles are prepared; 2 decorated magnetic nanoparticles are prepared; 3 oxidized grapheme reacts with the decorated magnetic nanoparticles, thereby obtaining oxidized graphene magnetic nanometer composite materials; and 4 the oxidized graphene magnetic nanometer composite materials are restored to obtain graphene magnetic nanometer composite materials, and the graphene magnetic nanometer composite materials can be used to monitor and control polycyclic aromatic hydrocarbon pollutants. The graphene magnetic nanometer composite materials composed by the method has the advantages of mild reaction, simple operation, convenient separation, high synthetic security and small environment pollution and the like.

Description

Technical field: [0001] The invention relates to a preparation method of a graphene magnetic nanocomposite material, and belongs to the technical field of graphene nanocomposite material preparation. Background technique: [0002] Graphene (Graphene) is a two-dimensional crystal formed by a single layer of carbon atoms closely arranged. Its excellent electron transfer performance and high mechanical strength characteristics make graphene an ideal choice for nanoelectronic devices, solar cells, biosensors, etc. Upstart. It is worth noting that the double-layer polyaromatic structure of graphene makes it have a super high specific surface area (theoretical value 2630m 2 g -1 ), this feature makes graphene one of the candidates for preparing adsorbents with high loading capacity. At the same time, graphene has a strong delocalized π electron system, which makes it strongly attractive to substances with carbon ring structures, thus laying the foundation for graphene in drug d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/28B01J20/30A61K47/02A61K47/04A61K47/24A61K47/32
Inventor 何瑜王仁宗宋功武王雪
Owner HUBEI FORBON TECH
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