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A kind of preparation method of graphene nanosphere

A technology of nanospheres and graphene, applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of preparation limitations, and achieve the effect of low synthesis cost, simple synthesis circuit and convenient operation

Inactive Publication Date: 2016-09-07
JIANGNAN GRAPHENE RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the synthesis of carbon nanospheres needs to be carried out under harsh reaction conditions, carbon nanospheres can only be produced in a few laboratories, and the preparation is greatly limited.

Method used

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  • A kind of preparation method of graphene nanosphere
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  • A kind of preparation method of graphene nanosphere

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Preparation of graphene oxide miniemulsion

[0027] At room temperature, add 40mL cyclohexane to a 50mL beaker, add 2.030g Span 80 and n-butanol respectively (the mass fraction ratio of Span 80 and n-butanol in this system is 1:1), and then add 1mL graphene oxide solution (5 mg / mL). After magnetic stirring (300rpm) in an ice-water bath, through ultrasonic emulsification, the ultrasonic power is 200W, the ultrasonic time is 10min, and the ultrasonic mode is 200w power pulse ultrasonic. After working for 2s, work for 2s and then work for 2s. Repeat this to form a stable and uniform fine emulsion.

[0028] (2) Preparation of graphene oxide nanogel spheres

[0029] Transfer the above-mentioned miniemulsion to a 100mL three-necked flask and place it in a water bath at 60°C, and stir it magnetically (150rpm). Speed ​​centrifugation for 30 min, remove the supernatant, and disperse the lower precipitate to obtain the alcohol dispersion of graphene oxide nanogel balls.

...

Embodiment 2

[0034] (1) Preparation of graphene oxide miniemulsion

[0035] At room temperature, add 40mL cyclohexane into a 50mL beaker, add 2.0g Triton X-100 and n-butanol respectively (the mass-number ratio of Triton X-100 and n-butanol in this system is 1:1), and then add 1mL Graphene oxide solution (11 mg / mL). Via magnetic stirring (300rpm) in an ice-water bath, ultrasonic emulsification is performed, the ultrasonic power is 200W, and the ultrasonic time is 10min. Forms a stable and homogeneous fine emulsion.

[0036] (2) Preparation of graphene oxide nanogel spheres

[0037] Transfer the above-mentioned miniemulsion to a 100mL three-necked flask and place it in a water bath at 70°C, and stir it magnetically (150rpm). Speed ​​centrifugation for 30 min, remove the supernatant, and disperse the lower precipitate to obtain the alcohol dispersion of graphene oxide nanogel balls.

[0038] (3) Preparation of graphene nanospheres

[0039] Add 20 mL of graphene oxide nanospheres to 50 μL...

Embodiment 3

[0042] (1) Preparation of graphene oxide miniemulsion

[0043] At room temperature, add 40mL cyclohexane to a 50mL beaker, add 2.0g Span 80 and n-butanol respectively (the mass fraction ratio of Span 80 and n-butanol in this system is 1:1), and then add 1mL graphene oxide solution (15mg / mL). Via magnetic stirring (300rpm) in an ice-water bath, ultrasonic emulsification is performed, the ultrasonic power is 200W, and the ultrasonic time is 10min. Forms a stable and homogeneous fine emulsion.

[0044] (2) Preparation of graphene oxide nanogel spheres

[0045] Transfer the above-mentioned miniemulsion to a 100mL three-necked flask and place it in a water bath at 65°C, and stir it magnetically (150rpm). Speed ​​centrifugation for 30 min, remove the supernatant, and disperse the lower precipitate to obtain the alcohol dispersion of graphene oxide nanogel balls.

[0046] (3) Preparation of graphene nanospheres

[0047] Add 0.1 mg of sodium borohydride to 20 mL of graphene oxide...

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Abstract

The invention relates to the technical field of novel materials and in particular discloses a method for preparing graphene nanospheres. The method comprises the following steps: (1) mixing a graphene oxide solution, a surfactant, a cosurfactant and an organic solvent, and performing ultrasonic emulsification, thereby obtaining uniform and stable emulsion; (2) heating the emulsion in a water bath until the moisture on the liquid drops is removed to obtain gel particles, and cleaning by using absolute ethyl alcohol, thereby obtaining monodispersed graphene oxide gel; and (3) adding N,N-dimethyl formamide into a closed container, dispersing the graphene oxide gel in N,N-dimethyl formamide, adding a reducing agent, heating, and reducing, thereby obtaining a target product. The diameter of each graphene nanosphere is between 30nm and 300nm.

Description

technical field [0001] The invention relates to the technical field of new materials, in particular to a method for preparing graphene nanospheres. Background technique [0002] Graphene is a new carbonaceous material with a single-layer sheet structure composed of a single layer of sp2 carbon atoms. Due to the special structure of graphene, the theoretical specific surface area is as high as 2600m 2 / g, excellent thermal conductivity (3000W / (m K)) and mechanical properties (1060GPa), and electron mobility up to 15000cm at room temperature 2 A series of properties such as / (V s) have aroused great interest in the scientific community since it was first reported in 2004, and set off an upsurge in graphene research. [0003] People's research on the self-assembly of graphene mainly focuses on two-dimensional materials, such as graphene transparent conductive film, graphene thin film electrode, graphene polymer or nanocomposite materials, etc. However, there are relatively f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/04B82Y30/00
Inventor 韩龙祥毕恒昌孙立涛
Owner JIANGNAN GRAPHENE RES INST
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