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Preparation method of three-dimensional graphene-protein composite aerogel

A protein composite, graphene technology, applied in chemical instruments and methods, alkali metal compounds, alkali metal oxides/hydroxides, etc., to achieve the effect of improving aggregation, good adsorption capacity, and enriching functional groups

Inactive Publication Date: 2016-06-29
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be solved by combining graphene with polymers and making three-dimensional hydrogels

Method used

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  • Preparation method of three-dimensional graphene-protein composite aerogel
  • Preparation method of three-dimensional graphene-protein composite aerogel
  • Preparation method of three-dimensional graphene-protein composite aerogel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Take five beakers, respectively add 40mg of graphite oxide into 20mL of distilled water and perform ultrasonication for 6h until the solution is uniform to obtain a 2mg / L graphene solution. Add 40 mg of ascorbic acid to the five groups of beakers respectively, and sonicate for 1 hour until the solution is uniform, then add 0 g, 80 mg, 160 mg, 240 mg, 320 mg, and 400 mg of bovine serum albumin into the five groups of beakers, and sonicate for 1 hour until the solution is uniform.

[0018] The solution was heated in a water bath at 80°C for 12h. After heating, pour out the water in the solution, pour distilled water into the hydrogel for 24 hours, and change the water every 12 hours. Pour off the solution in the beaker after soaking, the hydrogel is as figure 1 As shown, the hydrogel was freeze-dried for 24 hours to obtain a composite airgel, and the electron microscope was shown as figure 2 shown.

[0019] Five aerogels with different protein contents were added to 1...

Embodiment 2

[0021] Take five beakers, respectively add 40mg of graphite oxide into 20mL of distilled water and perform ultrasonication for 6h until the solution is uniform to obtain a 2mg / L graphene solution. Add 40mg of glutathione to the five groups of beakers respectively, and sonicate for 1h until the solution is uniform, then add bovine serum albumin 0g, 80mg, 160mg, 240mg, 320mg, 400mg to the five groups of beakers, and sonicate for 1h until the solution is uniform.

[0022] The solution was heated in a water bath at 80°C for 12h. After heating, pour out the water in the solution, pour distilled water into the hydrogel for 24 hours, and change the water every 12 hours. After soaking, the solution in the beaker was discarded, and the hydrogel was freeze-dried for 24 hours to obtain a composite airgel.

[0023] The three-dimensional graphene-protein airgel was added to a 10 mg / L tetracycline solution, and placed in a constant temperature shaker at 25°C for 24 hours. The aerogel had a...

Embodiment 3

[0025] Take five beakers, respectively add 40mg of graphite oxide into 20mL of distilled water and perform ultrasonication for 6h until the solution is uniform to obtain a 2mg / L graphene solution. Add 40mg of glutathione to the five groups of beakers respectively, and sonicate for 1h until the solution is uniform, then add soybean protein 0g, 80mg, 160mg, 240mg, 320mg, 400mg to the five groups of beakers, and sonicate for 1h until the solution is uniform.

[0026] The solution was heated in a water bath at 80°C for 12h. After heating, pour out the water in the solution, pour distilled water into the hydrogel for 24 hours, and change the water every 12 hours. After soaking, the solution in the beaker was discarded, and the hydrogel was freeze-dried for 24 hours to obtain a composite airgel.

[0027] The three-dimensional graphene-protein airgel was added to a 10 mg / L tetracycline solution, and placed in a constant temperature shaker at 25°C for 24 hours. The aerogel had a good...

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Abstract

The invention discloses a preparation method of a three-dimensional graphene-protein composite airgel. In acidic, alkaline, or neutral aqueous solution, graphite oxide, protein, and reducing agent are sequentially added, and after each substance is added, ultrasound is performed until a uniform solution is formed. The mixed solution is heated in a water bath at a temperature of 50°C to 100°C for 8 to 48 hours to obtain a graphene-protein composite hydrogel, and the composite hydrogel is dried to obtain an airgel. Adding glycerin to the glue can enhance the flexibility of the airgel. The composite hydrogel prepared by the invention is fluffy and porous, has certain flexibility, and has good adsorption effect on pollutants in water.

Description

technical field [0001] The invention relates to a simple and feasible method for preparing a three-dimensional graphene-protein composite airgel that can be used as an adsorbent. Background technique [0002] Adsorption is one of the most concerned water treatment technologies, which has the advantages of easy control and low cost. Currently, commonly used adsorbents include activated carbon, silica gel, alumina, polymers, etc. Due to their large specific surface area, nanomaterials have been extensively studied in adsorption. The specific surface area of ​​graphene, a carbon nanomaterial, is as high as 2630m2 / g under ideal conditions, but its application in adsorption still has limitations. First, there are only sp2 hybridized carbon atoms on the surface of graphene, so that it can only absorb The van der Waals force binds pollutants, so it has a weak effect on heavy metals and other pollutants. Secondly, graphene is prone to agglomeration, resulting in a decrease in its s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/24B01J20/28B01J20/30C02F1/28
Inventor 马杰庄媛陈君红李程杨明轩
Owner TONGJI UNIV
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