Aminated graphene aerogel based efficient adsorbent as well as preparation method and application thereof

A technology of aminated graphene and aerogel, applied in graphene, chemical instruments and methods, adsorption water/sewage treatment, etc., can solve the problems of low specific surface area, secondary pollution, difficult separation, etc., and improve the adsorption capacity , Improve the adsorption performance, and the effect of easy operation

Inactive Publication Date: 2018-08-21
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, on the one hand, due to the strong π-π stacking and van der Waals force between the sheets of single-layer graphene dispersed in aqueous solution, it causes irreversible agglomeration, and its actual specific surface area is far lower than the theoretical value; On the other hand, two-dimensional (2D) graphene adsorption materials exist in powder form in water, which are difficult to separate and easily cause secondary pollution, which largely limits their application in water treatment.

Method used

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  • Aminated graphene aerogel based efficient adsorbent as well as preparation method and application thereof
  • Aminated graphene aerogel based efficient adsorbent as well as preparation method and application thereof
  • Aminated graphene aerogel based efficient adsorbent as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0031] (1) Dissolve 0.06 g of graphite oxide in 20 mL of distilled water, put it into an ultrasonic machine, and ultrasonicate for 1 h at an ultrasonic frequency of 100 Hz to obtain a uniformly dispersed aqueous solution of graphene oxide with a concentration of 3 mg / mL.

[0032] (2) Add 0.3mL tetraethylenepentamine to the graphene oxide aqueous solution in step (1), and stir with a magnetic stirrer for 5min at room temperature to obtain a uniform mixed solution;

[0033] (3) Transfer the mixed solution obtained in the above step (2) into a 100mL high-temperature and high-pressure hydrothermal reactor with a polytetrafluoroethylene liner, and react at 180°C for 12h;

[0034] (4) The product obtained in step (3) was dialyzed and washed with 10% ethanol aqueous solution until the dialysate was neutral to obtain a hydrogel, which was freeze-dried for more than 36 hours to obtain an aerogel.

Embodiment 2

[0036] (1) Dissolve 0.06 g of graphite oxide in 20 mL of distilled water, put it into an ultrasonic machine, and ultrasonicate for 1 h at an ultrasonic frequency of 100 Hz to obtain a uniformly dispersed aqueous solution of graphene oxide with a concentration of 3 mg / mL.

[0037] (2) Add 0.5mL tetraethylenepentamine to the graphene oxide aqueous solution in step (1), and stir with a magnetic stirrer for 5min at room temperature to obtain a uniform mixed solution;

[0038] (3) Transfer the mixed solution obtained in the above step (2) into a 100mL high-temperature and high-pressure hydrothermal reactor with a polytetrafluoroethylene liner, and react at 180°C for 12h;

[0039] (4) The product obtained in step (3) was dialyzed and washed with 10% ethanol aqueous solution until the dialysate was neutral to obtain a hydrogel, which was freeze-dried for more than 36 hours to obtain an aerogel.

[0040] image 3 The photo of the aminated graphene obtained in this example standing on...

Embodiment 3

[0044] (1) Dissolve 0.06 g of graphite oxide in 20 mL of distilled water, put it into an ultrasonic machine, and ultrasonicate for 1 h at an ultrasonic frequency of 100 Hz to obtain a uniformly dispersed aqueous solution of graphene oxide with a concentration of 3 mg / mL.

[0045] (2) Add 1 mL of tetraethylenepentamine to the graphene oxide aqueous solution in step (1), and stir with a magnetic stirrer for 5 min at room temperature to obtain a uniform mixed solution;

[0046] (3) Transfer the mixed solution obtained in the above step (2) into a 100mL high-temperature and high-pressure hydrothermal reactor with a polytetrafluoroethylene liner, and react at 180°C for 12h;

[0047] (4) The product obtained in step (3) was dialyzed and washed with 10% ethanol aqueous solution until the dialysate was neutral to obtain a hydrogel, which was freeze-dried for more than 36 hours to obtain an aerogel.

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Abstract

The invention relates to a preparation method of a novel 3D graphene aerogel based efficient adsorbent. The method is characterized in that a graphene oxide aqueous solution and tetraethylenepentamineare uniformly mixed, the mixture is placed in a high-temperature and high-pressure reactor, a hydrothermal reaction is performed, aminated graphene hydrogel is prepared and processed with a freeze drying technique, and aminated graphene aerogel is obtained. The aerogel adsorbent is prepared with a one-step hydrothermal method, operation is simple, cost is lower, and the prepared aerogel is of a 3D porous and reticulated structure, is quite low in density, has huge specific surface area and shows excellent adsorption effect when used for adsorbing Cr (IV), and the adsorption capacity is as high as 361.48 mg/g.

Description

technical field [0001] The invention relates to the technical field of graphene airgel, in particular to an aminated graphene airgel high-efficiency adsorbent, a preparation method and an application thereof. Background technique [0002] Geim, a professor of physics at the University of Manchester in the United Kingdom, first stripped the single-atom layer graphene material in 2004, which is composed of carbon atoms with sp 2 The new material in which the hexagons formed by hybrid orbitals are arranged periodically in a honeycomb shape has caused a sensation in the scientific community as soon as it came out. Graphene has been widely used in different fields such as supercapacitors, energy storage materials, catalytic materials, sensors, and water treatment because of its unique mechanical properties, excellent electrical conductivity, and huge specific surface area. [0003] However, on the one hand, due to the strong π-π stacking and van der Waals force between the sheet...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/184C01B32/194B01J20/22B01J20/28B01J20/30C02F1/28C02F101/22
CPCB01J20/22B01J20/28047B01J20/28095C01B2204/20C01B2204/32C01P2002/72C01P2004/03C02F1/288C02F2101/22C01B32/184C01B32/194
Inventor 王学川魏菲李季裴逢春秦楠
Owner SHAANXI UNIV OF SCI & TECH
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