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Method for preparing crown ether functionalized graphene

A technology of graphene and graphene, which is applied in the field of preparation of crown ether functionalized graphene, can solve problems affecting the effect of functional groups, achieve good application prospects, simple preparation process, and environmental friendliness

Active Publication Date: 2019-08-27
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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  • Method for preparing crown ether functionalized graphene

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Experimental program
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Effect test

Embodiment 1

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

[0026] (2) Add 10 mg of 1-aza-18-crown-6 ether and 18 mg of dopamine to the graphene oxide alkali solution obtained in step (1), stir evenly by magnetic force, and keep warm under hydrothermal conditions at a constant temperature of 150° C. 2h, then add 0.8mL tetrabutylammonium hydroxide, react at 85°C for 10h;

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

[0028] (4) Heat the freeze-dried product obtained in step (3) to 890°C at a heating rate of 18°C / min in an oxygen-free environment, keep it warm for 5h for heat treatment, and after natural cooling, centrifugally clean and vacuum dry at 60°C for 12h , to obtain crown ether functionalized graphene.

Embodiment 2

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

[0031] (2) Add 30 mg of 1-aza-18-crown-6 ether and 36 mg of dopamine to the graphene oxide alkali solution obtained in step (1), stir evenly by magnetic force, and keep warm under the hydrothermal condition with a constant temperature of 130° C. After 3.5h, add 0.8mL tetrabutylammonium hydroxide and react at 85°C for 10h;

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

[0033] (4) Heat the freeze-dried product obtained in step (3) to 890°C at a heating rate of 18°C / min in an oxygen-free environment, keep it warm for 5h for heat treatment, and after natural cooling, centrifugally clean and vacuum dry at 60°C for 12h , to obtain crown ether functionalized graphene.

Embodiment 3

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

[0036] (2) Add 90 mg of 1-aza-18-crown-6 ether and 48 mg of dopamine to the graphene oxide alkali solution obtained in step (1), stir evenly with a magnetic force, and keep warm under hydrothermal conditions at a constant temperature of 110° C. 5h, then add 0.8mL tetrabutylammonium hydroxide, react at 85°C for 10h;

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

[0038] (4) Heat the freeze-dried product obtained in step (3) to 890°C at a heating rate of 18°C / min in an oxygen-free environment, keep it warm for 5h for heat treatment, and after natural cooling, centrifugally clean and vacuum dry at 60°C for 12h , to obtain crown ether functionalized graphene.

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Abstract

The invention discloses a method for preparing crown ether functionalized graphene and belongs to the technical field of nano materials. The method comprises the following step: by taking graphene and1-aza-18-crown-6-ether as a raw material, carrying out a hydrothermal reaction under an alkali condition, thereby obtaining the crown ether functionalized graphene. The method for preparing the crownether functionalized graphene, which is disclosed by the invention, has the characteristics of being simple and convenient in operation, friendly to the environment, low in cost and simple in preparation process, has the potential of achieving large-scale preparation of the crown ether functionalized graphene, and has good application prospects and potential application values in the field of potassium ion detection.

Description

technical field [0001] The invention relates to the technical field of nanomaterials, in particular to a method for preparing crown ether functionalized graphene. Background technique [0002] Graphene is a honeycomb single-layer 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 pay attention to graphene's potential in electronic conduction, biosensors, energy storage and conversion, etc. However, due to the large surface area of ​​graphene and the strong van der Waals force between graphene sheets, it is easy to aggregate, so it is of great significance to functionalize graphene. [0003] In order to broaden the application fields of graphene materials, it has been functionalized in recent years. For example, small molecul...

Claims

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Application Information

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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