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Preparation method of thiol-modified graphene

A sulfhydryl modification, graphene technology, applied in the directions of graphene, nano-carbon, etc., can solve the problems of cumbersome processing, nano-particle agglomeration, difficulty in obtaining graphene, etc., and achieves mild and environmentally friendly reaction conditions, simple and fast processing methods, and cheap raw materials. easy-to-get effect

Active Publication Date: 2013-02-13
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But this method has two disadvantages: (1) The graphene obtained by the reduced graphite oxide method has poor dispersion in the solvent, and it is difficult to obtain a single layer of graphene
(2) After the nanoparticles are modified on the graphene sheet, the shape and size of the nanoparticles cannot be controlled, and the agglomeration of the nanoparticles is prone to occur
The follow-up treatment of this method is cumbersome, and the remaining aluminum ions and lithium ions need to be removed from the reaction, and dialysis is also required.

Method used

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  • Preparation method of thiol-modified graphene

Examples

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Embodiment 1

[0023] Disperse 0.1g of graphite oxide into 200mL of DMF, then pour the dispersion into a 500mL three-necked flask, and add 0.1g of 2-mercaptoethylamine. Under mechanical stirring, react at 60°C for 10h. After the reaction was completed, it was filtered with suction and washed with DMF several times. A mercapto-modified graphite oxide was obtained. Disperse 0.1g of mercapto-modified graphite oxide into 200 L of DMF, pour the dispersion into a 500mL three-neck flask, add 0.2g of hydrazine hydrate, and react at 90°C for 24h under mechanical stirring. After the reaction was completed, it was filtered with suction and washed with DMF several times. After vacuum drying, thiol-modified graphene was obtained.

[0024] Take a sample and test the product. figure 1 It is a physical photo of graphene and mercaptographene dispersed in DMF; figure 2 It is the SEM photo and EDS surface scanning image of thiol-modified graphene; from figure 1 It can be seen that the thiol-modified gra...

Embodiment 2

[0026] Preparation method is with embodiment 1, uses HS (CH respectively 2 ) n NH 2 (n takes an integer between 3-18) to replace 2-mercaptoethylamine to obtain the corresponding mercapto-modified graphene product. For product testing, HS(CH 2 ) n NH 2 Successfully modified to the surface of graphene, thiol-modified graphene has good dispersion in DMF.

Embodiment 3

[0028] Disperse 0.1g of graphite oxide into 200mL of a 1:1 mixed solvent of water and ethanol, then pour the dispersion into a 500mL three-necked flask, and add 0.4g of 2-mercaptoethylamine. Under mechanical stirring, the reaction was carried out at room temperature for 24 hours. After the reaction was completed, it was filtered with suction and washed with water several times. A mercapto-modified graphite oxide was obtained. Disperse 0.2g of mercapto-modified graphite oxide into 200mL of water, pour the dispersion into a 500mL three-necked flask, add 0.02g of hydrazine hydrate, and react at 60°C for 36h under mechanical stirring. After the reaction was completed, it was filtered with suction and washed with water several times. The thiol-modified graphene was obtained after freeze-drying.

[0029] For product testing, 2-mercaptoethylamine was successfully modified on the surface of graphene, and mercapto-modified graphene has good dispersion in DMF.

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Abstract

The invention discloses a preparation method of thiol-modified graphene. The preparation method of the thiol-modified graphene comprises the following steps: adding graphite oxide and alkylamine with thiol at one end in a reaction solvent and stirring for reaction to obtain thiol-modified graphite oxide, wherein the mass ratio of the graphite oxide to the alkylamine is 1:(0.01-10.0) and the reaction temperature is 0-90 DEG C and the reaction lasts for 0.1-72 hours; adding the thiol-modified graphite oxide and a reducing agent to a reaction solvent and stirring for reaction to obtain a thiol-modified graphene solution, wherein the reaction temperature is 0-90 DEG C and the reaction lasts for 0.1-72h; and washing and drying the thiol-modified graphene to obtain solid powder of the thiol-modified graphene. According to the preparation method of the thiol-modified graphene, disclosed by the invention, the process method is simple and quick, reaction conditions are tender and environment-friendly, the raw materials are cheap and easy to get, no catalyst is needed, the prepared thiol-modified graphene has good dispersity in an organic solvent, and the preparation method of the thiol-modified graphene can be widely applied to the field of preparation of novel nano composite materials, preparation of novel electrochemical electrodes, as well as novel optical and conductive materials and the like.

Description

technical field [0001] The invention relates to the technical field of graphene modification, in particular to a preparation method of mercapto-modified graphene. Background technique [0002] Graphene is a two-dimensional material with a honeycomb structure composed of a single layer of sp2 hybridized carbon atoms, which has many excellent properties. Since its discovery in 2004, graphene has become a research hotspot in the scientific community. While studying the physical and chemical properties of graphene, composite materials related to graphene emerge in endlessly. In the direction of nanoscience, graphene is also used to prepare related nanocomposites, especially graphene / metal or graphene / metal oxide nanocomposites. Due to the excellent properties of graphene, these nanocomposites have broad research prospects in the fields of new energy, biosensing, catalysis, and optical materials. [0003] The current main method for preparing graphene / nanocomposite materials i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04C01B32/184
Inventor 袭锴王远董小虎黄新陈尚尚贾叙东余学海
Owner NANJING UNIV
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