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A method for mass production of double-sided graphene nanosheets using water-oil interface

A graphene nanosheet, water-oil interface technology, applied in the direction of graphene, nanotechnology for materials and surface science, nanocarbon, etc. The effect of high yield, high product purity and simple method

Active Publication Date: 2018-12-25
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method is technically complex, and it is not easy to achieve large-scale preparation of double-sided graphene.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Graphene oxide nanosheets were prepared by the modified Hummers' method using concentrated sulfuric acid, sodium nitrate, potassium permanganate and graphite. Disperse 50 mg of the obtained graphene oxide in 100 ml of deionized water, and disperse 100 mg of octadecylamine in 100 ml of peanut oil. Mix the dispersion liquid, react at 85°C for 6 hours under mechanical stirring at 2000 rpm, and centrifuge the product at 10000 rpm for 5 minutes to separate, and wash with ethanol to obtain double-sided graphene nanosheets. The obtained double-sided graphene nanosheets were assembled on the hydrophilic silicon substrate and the hydrophobic glass substrate respectively. The contact angle test showed that the surface of the hydrophilic silicon substrate became hydrophobic, while the surface of the hydrophobic glass substrate became hydrophilic. It shows that the two sides of the obtained graphene nanosheets have different physical and chemical properties, which is a double-sided...

Embodiment 2

[0024] Graphene oxide nanosheets were prepared by the modified Hummers' method using concentrated sulfuric acid, sodium nitrate, potassium permanganate and graphite. 10 mg of the obtained graphene oxide was dispersed in 100 ml of deionized water, and 100 mg of cetylamine was dispersed in 100 ml of olive oil. The dispersions were mixed, reacted at 85°C for 6 hours under 3000rpm mechanical stirring, and the product was separated by centrifugation at 10000rpm for 5 minutes, and washed with ethanol and acetone to obtain double-sided graphene nanosheets.

Embodiment 3

[0026] Graphene oxide nanosheets were prepared by the modified Staudenmaier' method using concentrated sulfuric acid, concentrated nitric acid, potassium chlorate and graphite. Disperse 80 mg of the obtained graphene oxide in 200 ml of deionized water, and disperse 100 mg of octadecylamine in 200 ml of olive oil. Mix the dispersion liquid, react at 80°C for 12 hours under mechanical stirring at 4000rpm, centrifuge the product at 10000rpm for 5 minutes to separate, and wash with ethanol and acetone to obtain double-sided graphene nanosheets.

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Abstract

According to the invention, a water-oil interface is constructed by the utilization of an oil phase and a water phase, and a modifier which is soluble in oil but insoluble in water is utilized to carry out selective surface chemical modification on graphene oxide nanosheet so as to achieve the purpose of large-scale preparation of double-sided graphene nanosheet. The method belongs to the technical field of chemical synthesis.

Description

technical field [0001] The invention relates to the selective surface chemical modification of graphene oxide by using an oil phase and a water phase to construct a water-oil interface, so as to achieve the purpose of preparing a large number of double-sided graphene nanosheets, and belongs to the technical field of chemical synthesis. Background technique [0002] Graphene is a new type of carbon material in which carbon atoms are arranged in a hexagonal grid in two-dimensional space. Due to its unique physical and chemical properties, it has attracted extensive attention from scientists in recent years. Double-sided graphene is a graphene material with different physical and chemical properties on both sides of two-dimensional graphene through different modifications or treatments. [0003] In order to make full use of the excellent properties of graphene itself and expand the application fields of graphene, graphene is modified by physical and chemical methods to make it...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/184B82Y30/00
Inventor 宋怀河张苏柳逸凡赵泽宇陈晓红
Owner BEIJING UNIV OF CHEM TECH