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Preparation method of acrylic acid grafted modified graphene with high adsorption performance

An acrylic acid grafting, graphene technology, applied in chemical instruments and methods, adsorption water/sewage treatment, water/sludge/sewage treatment, etc., can solve problems such as poor graphene dispersion

Pending Publication Date: 2021-01-05
TIANJIN POLYTECHNIC UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In order to solve the above problems, the present invention provides a method for preparing acrylic acid graft-modified graphene with high adsorption performance. The long chain of acrylic acid increases the content of hydrophilic groups on the surface of graphene, which overcomes the problem of poor dispersion of graphene in dyes and improves the adsorption performance of graphene on dyes

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  • Preparation method of acrylic acid grafted modified graphene with high adsorption performance
  • Preparation method of acrylic acid grafted modified graphene with high adsorption performance
  • Preparation method of acrylic acid grafted modified graphene with high adsorption performance

Examples

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Embodiment 1

[0023] A method for preparing acrylic acid grafted modified graphene with high adsorption performance, comprising the steps of:

[0024] Add 0.5 g of native graphene oxide to 200 ml of mixed acid mixed with concentrated sulfuric acid and concentrated nitric acid at a ratio of 3:1, perform acid oxidation treatment by ultrasonication for 1 h, then wash with deionized water and centrifuge until the centrifuged supernatant is neutral. Finally, the graphene was dried at 65° C. for 12 hours to obtain mixed acid pretreated graphene oxide in Example 1.

[0025] Utilize HITACHI TECNAI-20 transmission electron microscope and German Bruker company TENSOR37 Fourier transform infrared spectrometer to test the mixed acid pretreated graphene oxide prepared in the present embodiment 1, obtain figure 1 (1) and figure 2 (1).

Embodiment 2

[0027] A method for preparing acrylic acid grafted modified graphene with high adsorption performance, comprising the steps of:

[0028] 1) with the operation steps in embodiment 1;

[0029] 2) Add 0.1 g of the dried mixed-acid pretreated graphene oxide into 60 ml of deionized water, and ultrasonically disperse the graphene oxide evenly for 1 hour. Then add 1ml of acrylic acid monomer, add 0.0105g (1% of the mass of acrylic acid) potassium persulfate initiator, and stir in a water bath at 60°C for 6h. After the stirring was completed, it was washed with deionized water and centrifuged, and then the graphene oxide was dried at 65° C. for 12 hours to obtain the modified graphene oxide of Example 2.

[0030] Utilize HITACHI TECNAI-20 transmission electron microscope and German Bruker company TENSOR37 Fourier transform infrared spectrometer to test the modified graphene oxide that present embodiment 2 makes, obtain figure 1 (2) and figure 2 (2).

Embodiment 3

[0032] A method for preparing acrylic acid grafted modified graphene with high adsorption performance, comprising the steps of:

[0033] Change the addition amount of step 2) acrylic acid monomer into 2ml in embodiment 2, the addition amount of initiator is changed into 0.0210g, all the other conditions are the same as embodiment 2, obtain embodiment 3 modified graphene oxide.

[0034] Utilize HITACHI TECNAI-20 transmission electron microscope and German Bruker company TENSOR37 Fourier transform infrared spectrometer to test the modified graphene oxide prepared in the present embodiment 3, obtain figure 1 (3) and figure 2 (3).

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Abstract

The invention discloses a preparation method of acrylic acid grafted modified graphene with high adsorption performance, which comprises the following steps: uniformly dispersing graphene in a mixed acid solvent, carrying out ultrasonic acid oxidation pretreatment, cleaning the solution with deionized water, centrifugingthe solution, and drying the solution to obtain a preliminary modified graphene material; after acrylic acid polymerization modification, cleaning and centrifuging the material with deionized water, and drying the material to obtain a modified graphene material; then adding a certain amount of the modified graphene material into a dye solution with a certain volume and concentration, and measuring the concentration of the adsorbed dye after a period of time. According to the invention, acrylic acid long chains are grafted on the surface of the graphene modified by the method, so that the graphene contains a large number of oxygen-containing groups, the dispersion performance of the graphene can be fully improved, and the adsorption performance of the graphene to dyes is remarkably improved.

Description

technical field [0001] The invention belongs to the field of functional materials, in particular to a method for preparing acrylic acid graft-modified graphene with high adsorption performance. Background technique [0002] In recent years, with the acceleration of the industrialization process of dyestuffs, textiles, papermaking, leather, electroplating and other industries, various dyestuffs have been widely used in production and life, and more and more dyestuff wastewater has been brought about. Discharge, these undoubtedly bring great challenges to the water environment. However, some dyes are very stable in nature and are difficult to degrade in water, affecting the amount of incident light and further increasing the chroma of polluted waters, which not only destroys the steady state balance of the water environment, but also has fatal toxicity of such dyes. The life activities of other organisms have caused great harm. Therefore, the dye wastewater needs to be treate...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/30C02F1/28C02F101/30
CPCB01J20/20B01J20/261C02F1/288C02F2101/308
Inventor 李广芬王光林焦蕊
Owner TIANJIN POLYTECHNIC UNIV
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