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Porous graphene-based magnetic carbon block and preparation method and application thereof

A porous graphene and magnetic technology, applied in applications, can solve the problems of small specific surface area of ​​materials, unsatisfactory adsorption performance, unsuitable for sewage treatment, etc., and achieve the effect of excellent adsorption performance, outstanding adsorption effect, and beneficial to recycling.

Active Publication Date: 2017-11-03
佛山市高科合创科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the sewage treatment materials reported in the literature are graphene powders, and the reports on graphene blocks are only pure graphene blocks used for electrode materials, which are not suitable for sewage treatment.
Moreover, in general, the synthesized graphene is relatively loose, and most of it is powdery, and it is not easy to form a block.
In addition, pure graphene materials, on the one hand, have high cost, on the other hand, the specific surface area of ​​the material is small, and the adsorption performance cannot achieve the ideal effect.
In summary, the current graphene materials are high in cost and poor in performance, and are still far from practical applications.

Method used

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  • Porous graphene-based magnetic carbon block and preparation method and application thereof
  • Porous graphene-based magnetic carbon block and preparation method and application thereof
  • Porous graphene-based magnetic carbon block and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The preparation method of porous graphene-based magnetic carbon block, the main steps are as follows:

[0031] (1) 50mg graphite oxide is dissolved in 25g ethanol (graphite oxide and ethanol solvent mass ratio are 1:500), ultrasonic dispersion is uniform, then add 15mg polyvinyl pyrrolidone and mix homogeneously, obtain graphite oxide and surfactant mixture;

[0032] (2) Add 0.5 g of cobalt chloride (the mass ratio of cobalt chloride and ethanol solvent is 1:50) and 0.8 g of fructose to the mixed solution obtained in step (1), and stir for 1 h at 45 ° C and 120 r / min speed uniform to obtain a precursor solution;

[0033] (3) Pour the precursor solution obtained in step (2) into a reaction kettle, and conduct a hydrothermal reaction at 175°C for 7 hours. ℃, the freeze-drying time is 30h), and then heat treatment at 850°C for 3h under an argon atmosphere to obtain a porous graphene-based magnetic carbon block.

[0034] Performance test: In the adsorption experiment of ...

Embodiment 2

[0036] This example differs from Example 1 in that the solvent described in step (1) is water, and other conditions are the same as Example 1.

Embodiment 3

[0038] The difference between this embodiment and Example 2 is that the surfactant described in step (1) is cetyltrimethylammonium bromide, and other conditions are the same as in Example 2.

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Abstract

The invention discloses a porous graphene-based magnetic carbon block and a preparation method thereof; the preparation method comprises the main steps of (1) dispersing graphite oxide evenly in a solvent, adding a surfactant, and mixing well to obtain graphite oxide and surfactant mixed solution; (2) adding a cobalt salt and a polymer into the mixed solution of step (1), and mixing well to obtain a precursor solution; subjecting the precursor solution of step (2) to hydrothermal reaction, washing the reaction product, lyophilizing, and thermally treating to obtain the porous graphene-based magnetic carbon block. The porous graphene-based magnetic carbon block provided herein is a lightweight porous magnetic carbon block material, capable of adsorbing organic matters, organic dyes and heavy metal ions and widely applicable to wastewater treatment; and the preparation method has the advantages of good process simplicity, low cost and high yield and is easy to commercialize.

Description

technical field [0001] The invention relates to a porous graphene-based magnetic carbon block and its preparation method and application, belonging to the fields of sewage treatment and the like. Background technique [0002] Water pollution is one of the major environmental problems facing our country. With the development of my country's industry, the discharge of industrial wastewater is increasing day by day. After the industrial wastewater that does not meet the discharge standards is discharged into the water body, it will pollute the surface water and groundwater. Once a water body is polluted, it is not easy to restore it to its original state in a short period of time. After the water body is polluted, not only will the water quality fail to meet the standards of drinking water and fishery water, but it will also increase the chemical harmful substances and hardness in the groundwater, which will affect the utilization of groundwater. my country's water resources ...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/28B01J20/30C02F1/28C02F1/48C02F101/30C02F101/20
CPCB01J20/0225B01J20/20B01J20/28009C02F1/283C02F1/488C02F2101/20C02F2101/30C02F2101/308
Inventor 袁定胜王蕾胡朝霞
Owner 佛山市高科合创科技有限公司
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