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Method for making pores on the surface of graphene

A graphene surface and pore-forming technology, which is applied in the field of nanomaterials, can solve the problems of many product impurities, difficult to control the size of the pores, and large selection restrictions on the particle size of the activator, and achieve simple operation, uniform and regular product appearance, and implementation The effect of low equipment requirements

Inactive Publication Date: 2016-03-16
上海碳源汇谷新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the particle size selection of the activator in this technology is limited, the product has many heteroions, and the pore size is difficult to control.

Method used

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  • Method for making pores on the surface of graphene
  • Method for making pores on the surface of graphene
  • Method for making pores on the surface of graphene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] At room temperature, graphene oxide prepared by chemical exfoliation of graphite oxide was added to ethanol at a concentration of 1 mg / mL, and a uniformly dispersed graphene oxide ethanol solution was obtained by ultrasonication for 1 h. Ferrocene was added into the graphene oxide ethanol dispersion at a mass ratio of 20:1, and a uniformly dispersed ethanol mixture of graphene oxide and ferrocene was obtained by ultrasonication for 4 hours and stirring for 2 hours. The prepared mixture was hydrothermally heated at 180° C. for 4 h, filtered and dried to obtain a precursor with uniform morphology. Preparing the prepared precursor in H 2 / Ar gas atmosphere, heat treatment at 900°C for 4h, and after cooling, a thermal reduction product with regular morphology was obtained. Add excess mass concentration of 30% hydrochloric acid solution to the thermal reduction product, filter and dry to obtain porous graphene.

[0031] The precursor prepared in this example is as figure ...

Embodiment 2

[0035] At room temperature, graphene oxide prepared by chemical exfoliation of graphite oxide was added to ethanol at a concentration of 1 mg / mL, and a uniformly dispersed graphene oxide ethanol solution was obtained by ultrasonication for 1 h. Add ferrocene into the graphene oxide ethanol dispersion at a mass ratio of 1:1, and obtain a uniformly dispersed graphene oxide ferrocene ethanol solution by ultrasonication for 2 hours and stirring for 2 hours. The prepared dispersion liquid was hydrothermally heated at 160°C for 10 h, filtered and dried to obtain a precursor with uniform morphology, such as figure 2 shown. The prepared precursor was heat-treated at 700 °C for 4 h in an Ar gas atmosphere, and a heat-treated product with a regular shape was obtained after cooling. Add excess mass concentration of 30% hydrochloric acid solution to the heat-treated product, filter and dry to obtain porous graphene.

[0036] The product prepared in this embodiment is as Figure 4 As s...

Embodiment 3

[0039]At room temperature, graphene oxide prepared by chemical exfoliation of graphite oxide was added to ethanol at a concentration of 0.5 mg / mL, and a uniformly dispersed graphene oxide ethanol solution was obtained by ultrasonication for 1 h. Add ferrocene into the graphene oxide ethanol dispersion at a mass ratio of 50:1, and obtain a uniformly dispersed graphene oxide ferrocene ethanol solution by ultrasonication for 6 hours and stirring for 2 hours. The prepared dispersion was hydrothermally heated at 180° C. for 3 h, filtered and dried to obtain a precursor with uniform morphology. The prepared precursor in N 2 Gas atmosphere, heat treatment at 800 ° C for 4 hours, and after cooling, a heat-treated product with regular shape was obtained. Add excess mass concentration of 30% hydrochloric acid solution to the heat-treated product, filter and dry to obtain porous graphene.

[0040] The product prepared in this embodiment is as Image 6 As shown, its physical and chemic...

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Abstract

The invention relates to a preparation method of graphene surface pore-forming in the technical field of nanometer materials. The preparation method comprises the following steps: mixing dispersion liquids of ferrocene and graphene oxide to prepare a precursor through hydro-thermal treatment, and after thermal treatment and cooling, carrying out acid treatment to obtain porous graphene, wherein the mass ratio of the ferrocene to the graphene oxide is 1: 20 to 50: 1; the hydro-thermal treatment means that heating is carried out for 1-24h at the temperature of 140-220 DEG C. According to the method, raw materials are widely and easily available, the repetitive rate is high, the product morphology is excellent, and the requirement on implement equipment is low; compared with the prior art, the method has the advantages that environmental protection is achieved, the operation is simple, and the product morphology obtained through preparation is uniform and regular.

Description

technical field [0001] The invention relates to a method in the technical field of nanomaterials, in particular to a method for forming pores on the surface of graphene. Background technique [0002] Graphene, as a two-dimensional material composed of carbon atoms in a hexagonal honeycomb lattice with sp2 hybrid orbitals, has only one carbon atom thickness. Since Ding Novoselov was successfully separated from graphite, because of its good mechanical properties, thermal properties, chemical properties and electrical properties, it has been widely used in energy, chemical industry, biology, medicine, etc. people's attention. [0003] The characteristic of a carbon atom thickness makes graphene materials as high as 2630m 2 g -1 However, in the actual use process, the actual specific surface area of ​​the graphene material is much smaller than its theoretical value, which is the result of the easy agglomeration of the graphene sheets during the use process. Therefore, it will...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/04C01B32/194
Inventor 郭守武张嘉楠杨永强吴海霞吴晓晨
Owner 上海碳源汇谷新材料科技有限公司
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