Graphene oxide covalently bonded and coated magnetic nanoparticle composite material and preparation method thereof

A magnetic nanoparticle and composite material technology, applied in the field of graphene oxide covalent bond-coated magnetic nanoparticle composite material and its preparation, can solve the problems of composite material structure and performance influence, application value, adsorption performance decline and the like, Achieve the effect of excellent adsorption performance, structural improvement and adsorption regeneration performance improvement

Active Publication Date: 2017-03-29
徐州拓迈五金工具制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Fe in this type of composite 3 o 4 It is not very stable. On the one hand, the adsorbed heavy metal ions are also likely to occupy the position of oxygen atoms on the graphene oxide, resulting in heavy metal ions and Fe 3 o 4 Particles compete to occupy the oxygen atom positions of graphene oxide, which may make the Fe 3 o 4 In this way, the structure and performance of the composite material will inevitably be affected, and in the process of adsorption, desorption and regeneration, it is often accompanied by a strong mechanical stirring process, which may make Fe 3 o 4 detach from the graphene surface, but also lead to Fe 3 o 4 There is a reunion problem to some extent
In recent years, some people have tried and prepare

Method used

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  • Graphene oxide covalently bonded and coated magnetic nanoparticle composite material and preparation method thereof
  • Graphene oxide covalently bonded and coated magnetic nanoparticle composite material and preparation method thereof
  • Graphene oxide covalently bonded and coated magnetic nanoparticle composite material and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0038] S1. Add 1.0 g of polyethylene glycol (PEG-4000) into 40 mL of ethylene glycol (EG), and stir magnetically for 30 minutes under heating in an oil bath at 80°C until PEG-4000 is completely dissolved. Weigh 1.35 g ferric chloride hexahydrate (FeCl 3 •6H 2 O), 3.6 g sodium acetate (NaAc 3H 2 O), add to the above dissolving solution, stir to make it dissolve completely, and add distilled water 5mL dropwise to the mixed solution during the dissolving process. Stirring was continued for 30 min until the mixture was completely dissolved, then transferred to a 100 mL stainless steel autoclave lined with polytetrafluoroethylene, reacted in a blast oven at 200 °C for 8 h, and cooled naturally to room temperature. Collected by centrifugation, washed several times with distilled water and absolute ethanol, and finally dried at 60°C for 6 hours to obtain Fe 3 o 4 Nanoparticles;

[0039] S2. Weigh 1.4g Fe 3 o 4 The nanoparticles were added to a four-neck flask containing 280 mL...

Embodiment 2

[0050] S1. Add 1.0 g of polyethylene glycol (PEG-4000) into 40 mL of ethylene glycol (EG), and stir magnetically for 30 minutes under heating in an oil bath at 80°C until PEG-4000 is completely dissolved. Weigh 1.35 g ferric chloride hexahydrate (FeCl 3 • 6H2O), 3.6 g sodium acetate (NaAc • 3H 2 O), add to the above dissolving solution, stir to make it dissolve completely, during the dissolving process, add distilled water H dropwise to the mixed solution 2 O 10mL. Stirring was continued for 30 min until the mixture was completely dissolved, then transferred to a 100 mL stainless steel autoclave lined with polytetrafluoroethylene, reacted in a blast oven at 200 °C for 4 h, and cooled naturally to room temperature. Collected by centrifugation, washed several times with distilled water and absolute ethanol, and finally dried at 60°C for 6 hours to obtain Fe 3 o 4 particle;

[0051] S2. Weigh 1.4g Fe 3 o 4 Sonicate for 15 min to disperse into a four-necked flask containing...

Embodiment 3~10

[0058] The preparation method of embodiment 3~6 is substantially the same as embodiment 1, difference is as follows:

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Abstract

The invention discloses a graphene oxide covalently bonded and coated magnetic nanoparticle composite material and a preparation method thereof. According to the preparation method, Fe3O4 nanoparticles are prepared, the Fe3O4 nanoparticles are subjected to surface modification and functional group introduction to generate Fe3O4@SiO2-NH2 particles, and the Fe3O4@SiO2-NH2 particles react with graphene oxide so as to coat the Fe3O4@SiO2-NH2 particle surface with the graphene oxide through covalent bonding. Compared to the reported graphene oxide-Fe3O4 composite material, the composite material of the present invention has the following advantages that the structure is improved, the stability is substantially enhanced, and the defects that the Fe3O4 is electrostatically coated with graphene oxide and the Fe3O4 deposits in the graphene oxide sheet layer composite layer are overcome, According to the present invention, the graphene oxide-Fe3O4 composite material prepared through the method has excellent adsorption property for heavy metals, can be reused, and has broad application prospects in the fields of heavy metal sewage treatment and the like, wherein the adsorption process is simple, green, and environmental protection.

Description

technical field [0001] The invention belongs to the technical field of carbon materials, and more specifically relates to a graphene oxide covalent bond-coated magnetic nanoparticle composite material and a preparation method thereof. Background technique [0002] Graphene is a new type of carbon nanomaterial. Due to its unique structure and excellent performance, once it came out, it quickly became the focus of research in the field of international new materials. As an adsorption material for water treatment, the application prospect of graphene materials is worth looking forward to. On the one hand, it has outstanding advantages such as two-dimensional planar structure, open pore structure, good flexibility, high mechanical strength, stable chemical properties, and large specific surface area; on the other hand, carbon nanotubes similar to graphene structure The material shows good adsorption performance, and compared with carbon nanotubes, graphene has a larger specific...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/28B01J20/30C02F1/28C02F101/20
CPCB01J20/205B01J20/28009C02F1/288C02F2101/20
Inventor 胡忠良秦士林李朝晖席柳江黄志丁燕鸿颉雨佳
Owner 徐州拓迈五金工具制造有限公司
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