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A kind of preparation method of crown ether functionalized graphene

A graphene and graphene technology, applied in the field of preparation of crown ether functionalized graphene, can solve problems such as affecting the effect of functional groups, and achieve the effects of good application prospects, environmental friendliness, and easy operation.

Active Publication Date: 2022-06-07
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, scientists use graphene oxide to realize its functionalization, because their surface or edge has more or less a certain amount of functional groups, such as: hydroxyl, carboxyl, epoxy, carbonyl, etc., and the applicant It was found that although these functional groups make graphene oxide easy to realize its functionalization, these functional groups will also affect the required functional groups to exert their effects.

Method used

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  • A kind of preparation method of crown ether functionalized graphene

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Under ice bath, ultrasonically disperse graphene oxide in ultrapure water for 30min to form 30mL of 1mg / mL graphene oxide aqueous solution, then add 6mL of 1mmol / L alkaline solution, mix well to form Graphene oxide alkali solution;

[0026] (2) add the 1-aza-18-crown-6 ether of 10mg and the dopamine of 18mg to the graphene oxide alkali solution obtained in step (1), stir uniformly by magnetic force, keep warm under the hydrothermal condition of temperature 150 ℃ constant temperature 2h, then 0.8mL of tetrabutylammonium hydroxide was added, and the reaction was carried out at 85°C for 10h;

[0027] (3) freeze-drying to obtain freeze-dried product;

[0028] (4) The freeze-dried product obtained in step (3) was heated to 890°C at a heating rate of 18°C / min in an oxygen-free environment, kept for 5 hours for heat treatment, after natural cooling, centrifugal cleaning, and vacuum drying at 60°C for 12 hours , to obtain crown ether functionalized graphene.

Embodiment 2

[0030] (1) Under ice bath, ultrasonically disperse graphene oxide in ultrapure water, ultrasonicate for 30min, form 30mL of 1mg / mL graphene oxide aqueous solution, then add 6mL of 3mmol / L alkaline solution, mix well, and form Graphene oxide alkali solution;

[0031] (2) in step (1) gained graphene oxide alkali solution, add the 1-aza-18-crown-6 ether of 30mg and the dopamine of 36mg, magnetic stirring is uniform, keep warm under the hydrothermal condition of temperature 130 ℃ of constant temperature After 3.5h, 0.8mL of tetrabutylammonium hydroxide was added, and the reaction was carried out at 85°C for 10h;

[0032] (3) freeze-drying to obtain freeze-dried product;

[0033] (4) The freeze-dried product obtained in step (3) was heated to 890°C at a heating rate of 18°C / min in an oxygen-free environment, kept for 5 hours for heat treatment, after natural cooling, centrifugal cleaning, and vacuum drying at 60°C for 12 hours , to obtain crown ether functionalized graphene.

Embodiment 3

[0035] (1) Under ice bath, ultrasonically disperse graphene oxide in ultrapure water for 30 min to form 30 mL of 1 mg / mL graphene oxide aqueous solution, then add 6 mL of 5 mmol / L alkaline solution, mix well, and form Graphene oxide alkali solution;

[0036] (2) in step (1) gained graphene oxide alkali solution, add the 1-aza-18-crown-6 ether of 90mg and the dopamine of 48mg, magnetic stirring is uniform, keep warm under the hydrothermal condition of temperature 110 ℃ of constant temperature 5h, then 0.8mL of tetrabutylammonium hydroxide was added, and the reaction was carried out at 85°C for 10h;

[0037] (3) freeze-drying to obtain freeze-dried product;

[0038] (4) The freeze-dried product obtained in step (3) was heated to 890°C at a heating rate of 18°C / min in an oxygen-free environment, kept for 5 hours for heat treatment, after natural cooling, centrifugal cleaning, and vacuum drying at 60°C for 12 hours , to obtain crown ether functionalized graphene.

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Abstract

The invention discloses a method for preparing crown ether functionalized graphene, which belongs to the technical field of nanomaterials. The invention uses graphene oxide and 1-aza-18-crown-6-ether as raw materials, and passes water under alkaline conditions. Crown ether functionalized graphene prepared by thermal reaction. The preparation method of the crown ether functionalized graphene of the present invention has the characteristics of simple operation, environmental friendliness, low cost and simple preparation process, and is expected to realize the large-scale preparation of the crown ether functionalized graphene, and has good application in the field of detecting potassium ions. Application prospect and potential application value.

Description

technical field [0001] The invention relates to the technical field of nanomaterials, in particular to a preparation method of crown ether functionalized graphene. Background technique [0002] Graphene is a honeycomb monolayer two-dimensional carbon nanomaterial composed of carbon atoms in regular hexagons. It has excellent electrical properties, optical properties, thermal conductivity, barrier properties, quantum Hall effect, room temperature ferromagnetic effect, etc. Due to its unique properties, scientists have begun to focus on graphene's potential for electronic conduction, biosensors, energy storage and conversion, and more. However, due to the large surface area of ​​graphene and the strong van der Waals forces between graphene sheets, aggregation is prone to occur, so functional modification of graphene is of great significance. [0003] In order to broaden the application fields of graphene materials, functionalization has begun to be carried out in recent years...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/184C01B32/194
CPCC01B32/184C01B32/194
Inventor 章海霞智翠梅侯莹闫晓丽张华王永祯郭俊杰
Owner TAIYUAN UNIV OF TECH