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Preparation method and application of aminated graphene

A technology of aminated graphene and graphene powder, which is applied in the direction of single-layer graphene, chemical instruments and methods, adsorption water/sewage treatment, etc., can solve complex processes, products that cannot ensure single-atom sheet structure, operating requirements and Requires high environmental conditions and other issues to achieve the effect of mild reaction, improved adsorption capacity and high safety

Inactive Publication Date: 2016-06-08
TIANJIN NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, most of the existing methods for the preparation of aminated graphene are complicated, and have high requirements for the operation and environmental conditions in the preparation process, and the obtained products cannot be guaranteed to have a monoatomic sheet structure.

Method used

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  • Preparation method and application of aminated graphene
  • Preparation method and application of aminated graphene
  • Preparation method and application of aminated graphene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] (1) Dissolve 0.1g graphene oxide powder in 1.6mL dimethylformamide, stir well to form a stable suspension;

[0041] (2) Mix 11mL of tetrahydrofuran with 1.6mL of N,N’-dicyclohexylcarbodiimide, and stir well;

[0042] (3) Add 2.2 mL of ethylenediamine and the tetrahydrofuran solution of N,N'-dicyclohexylcarbodiimide prepared in step 2) to the suspension prepared in step 1), stir for 3 days, and filter with suction to obtain amino Graphene;

[0043] (4) washing the aminated graphene obtained in step (3) several times with methanol and distilled water, respectively, to remove residual organic matter during the operation;

[0044] (5) Add an appropriate amount of ultrapure water to the aminated graphene obtained in step (4), and sonicate in a water bath for 20 minutes;

[0045] (6) Freeze-drying the aminated graphene obtained in step (5) to obtain the aminated graphene with a monoatomic sheet structure.

Embodiment 2

[0047] (1) Dissolve 0.1g graphene oxide powder in 5.2mL dimethylformamide, stir well to form a stable suspension;

[0048] (2) Mix 15.7mL tetrahydrofuran with 1.6mL N,N’-dicyclohexylcarbodiimide, and stir well;

[0049] (3) Add 2.2 mL of ethylenediamine and the tetrahydrofuran solution of N,N'-dicyclohexylcarbodiimide prepared in step 2) to the suspension prepared in step 1), stir for 3 days, and filter with suction to obtain amino Graphene;

[0050] (4) washing the aminated graphene obtained in step (3) several times with methanol and distilled water, respectively, to remove residual organic matter during the operation;

[0051] (5) Add an appropriate amount of ultrapure water to the aminated graphene obtained in step (4), and sonicate in a water bath for 20 minutes;

[0052] (6) Freeze-drying the aminated graphene obtained in step (5) to obtain the aminated graphene with a monoatomic sheet structure.

Embodiment 3

[0054] (1) Dissolve 0.1g graphene oxide powder in 10mL dimethylformamide, stir well to form a stable suspension;

[0055] (2) Mix 18mL tetrahydrofuran with 1.5mL N,N’-dicyclohexylcarbodiimide, and stir well;

[0056] (3) Add 2.2 mL of ethylenediamine and the tetrahydrofuran solution of N,N'-dicyclohexylcarbodiimide prepared in step 2) to the suspension prepared in step 1), stir for 3 days, and filter with suction to obtain amino Graphene;

[0057] (4) washing the aminated graphene obtained in step (3) several times with methanol and distilled water, respectively, to remove residual organic matter during the operation;

[0058] (5) Add an appropriate amount of ultrapure water to the aminated graphene obtained in step (4), and sonicate in a water bath for 20 minutes;

[0059] (6) Freeze-drying the aminated graphene obtained in step (5) to obtain the aminated graphene with a monoatomic sheet structure.

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Abstract

The invention discloses a preparation method of aminated graphene, particularly a preparation method and application of aminated graphene, belonging to the field of environmental functional materials. The preparation method comprises the following steps: dissolving graphene oxide powder in a dimethylformamide solution, respectively adding ethylenediamine and an N,N'-dicyclohexylcarbodiimide tetrahydrofuran solution, and reacting to obtain the monoatomic-lamellar-structure aminated graphene. The preparation method is simple, and has the advantages of mild preparation reaction and high safety. The obtained aminated graphene is a monoatomic lamellar structure, has the advantages of high amination degree and higher nitrogen content than the products of other preparation methods, is beneficial to adsorbing heavy metal ions in wastewater, and has favorable application prospects in the aspect of heavy metal wastewater treatment.

Description

[0001] This application is supported by the "Innovative Team Training Program" of Tianjin Higher Education Institutions (TD12-5037) and the Tianjin Normal University Doctoral Fund (52XB1403). technical field [0002] The invention belongs to the field of environmental functional materials, and in particular relates to a preparation method of aminated graphene and its application in treating heavy metal sewage. Background technique [0003] Since its discovery in 2004, graphene has attracted extensive attention due to its outstanding electrical and mechanical properties. Because graphene has a unique monoatomic sheet structure and a large specific surface area, it has a strong adsorption capacity for pollutants in the water environment. However, graphene is prone to agglomeration in aqueous solution, which is not conducive to the adsorption of pollutants on its surface, while the surface of functionalized graphene (such as graphene oxide, aminated graphene, etc.) has function...

Claims

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Application Information

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IPC IPC(8): C01B31/04C02F1/28C02F1/62
CPCC01B2204/02C01P2002/82C01P2002/85C01P2004/04C02F1/281
Inventor 王方卢妙杰王中良
Owner TIANJIN NORMAL UNIVERSITY
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