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Method for preparing graphene from solid organic acid by using alkali metal salt as catalyst

A solid organic acid and alkali metal salt technology, applied in the direction of graphene, nano-carbon, etc., can solve problems such as difficult macro-preparation, achieve cost reduction, fewer influencing factors, and easy control

Active Publication Date: 2015-04-29
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, in subsequent applications, it is necessary to transfer graphene from the substrate, or use strong acid to remove the template, it is difficult to achieve macro-production

Method used

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  • Method for preparing graphene from solid organic acid by using alkali metal salt as catalyst
  • Method for preparing graphene from solid organic acid by using alkali metal salt as catalyst
  • Method for preparing graphene from solid organic acid by using alkali metal salt as catalyst

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Experimental program
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Effect test

Embodiment 1

[0029] Using mechanical grinding, succinic acid and sodium carbonate were mixed in a molar ratio of 1:4, and 1.5 g was placed in a reactor protected by an argon atmosphere. React at 800°C for 2 minutes. After the product was cooled, the product was taken out, washed with deionized water, filtered, dried, and the product was collected. The XPS analysis results showed that the oxygen content was 7.0% (atomic percentage), and the scanning electron microscope results showed that the sample had a network structure, and the thickness of graphene sheets was ~4.5nm.

Embodiment 2

[0031] Using the solution mixing method, according to the molar ratio of succinic acid and potassium carbonate as 1:1, succinic acid and potassium carbonate were respectively made into solutions and mixed, then the solvent was removed to obtain a solid mixture, and 2 g was placed in a reactor protected by a nitrogen atmosphere. . React at 700°C for 120min. After the product was cooled, the product was taken out, washed with deionized water, filtered, dried, and the product was collected. The XPS analysis results show that the oxygen content is 10% (atomic percentage), and the scanning electron microscope results show that the sample has a network structure, and the thickness of the graphene sheet is ~4nm

Embodiment 3

[0033] By mechanical grinding, adipic acid and sodium chloride were mixed at a molar ratio of 1:0.1, and 1.5 g was taken and placed in a reactor protected by a nitrogen atmosphere. React at 1300°C for 0.5min. After the product was cooled, the product was taken out, washed with deionized water, filtered, dried, and the product was collected. The XPS analysis results showed that the oxygen content was 7% (atomic percentage), and the scanning electron microscope results showed that the sample had a network structure, and the thickness of graphene sheets was ~2.2nm.

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Abstract

The invention relates to a method for preparing graphene from solid organic acid by using an alkali metal salt as a catalyst, which comprises the following steps: mixing solid organic acid and a catalyst, putting the mixture in a reactor in an inert or protective atmosphere, reacting, and cooling to room temperature in the same protective atmosphere to obtain a solid product, and washing the solid product, filtering, and drying to obtain the graphene product. The method has the advantages of no pollution, low cost and simple technique, and can implement large-scale preparation.

Description

technical field [0001] The invention belongs to a method for preparing graphene, in particular to a method for preparing graphene from solid organic acid catalyzed by an alkali metal salt. Background technique [0002] Graphene was first successfully obtained in 2004 by a single-layer sp 2 The two-dimensional carbonaceous crystal composed of hybrid carbon has excellent electrical conductivity, mechanical properties, ultra-high specific surface area, and good passage and transport of guest molecules / ions, etc., and has potential application value in many fields. With the deepening of research, the demand for macro-acquisition of graphene has become increasingly strong. Therefore, how to achieve large-scale preparation has become one of the urgent problems that restrict the further research and application of graphene. [0003] The early preparation methods mainly used adhesive tape or micromechanical methods to exfoliate graphite to obtain graphene. The process is costly, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/04C01B32/184
Inventor 朱珍平崔会娟郑剑锋孟新朱艳艳
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI