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Method for converting carbon nanotube into graphene quantum sheet and graphene quantum sheet prepared by using same

A carbon nanotube, graphene quantum sheet technology, applied in graphene, nanocarbon and other directions, can solve the problems of high cost, difficult to achieve large-scale production, complex graphene quantum sheet preparation process, etc., and achieves easy operation, good crushing and Peeling effect, easy to scale production effect

Inactive Publication Date: 2019-06-07
THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The object of the present invention is to provide a kind of method that is converted into graphene quantum sheet by carbon nanotube and the graphene quantum sheet that ma

Method used

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  • Method for converting carbon nanotube into graphene quantum sheet and graphene quantum sheet prepared by using same
  • Method for converting carbon nanotube into graphene quantum sheet and graphene quantum sheet prepared by using same
  • Method for converting carbon nanotube into graphene quantum sheet and graphene quantum sheet prepared by using same

Examples

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Embodiment 1

[0083] A method for converting carbon nanotubes into graphene quantum sheets comprises the steps:

[0084] (1) 1g of multi-walled carbon nanotubes with an average length of 20 μm, 1g of silicon dioxide with an average size of 400nm and 10g of agate balls with a diameter of 0.5mm are mixed, and ball milled for 0.5h;

[0085] (2) Separate the agate balls, add N-methylpyrrolidone (NMP) to make a 1mg / mL dispersion, and then sonicate for 120h with an ultrasonic power of 50W;

[0086] (3) The sample after the ultrasonic wave is first centrifuged, the centrifugal speed is 500r / min, and the centrifugal time is 120min, then it is vacuum filtered, and the filter membrane with a pore size of 0.02 μm is obtained to obtain the NMP dispersion of the graphene quantum sheet;

[0087] (4) Add 1L of ethyl acetate and 0.5L of N,N-dimethylacetamide to the graphene quantum sheet NMP dispersion (1L) described in step (3), carry out centrifugation at 5000r / min after the precipitation is complete 10...

Embodiment 2

[0096] The difference from Example 1 is that the time for ball milling in step (1) is 3 hours, and the time for ultrasonication in step (2) is 10 hours.

Embodiment 3

[0098] The difference from Example 2 is that in step (4) ethyl acetate is replaced by n-hexane, and in step (5) NMP is replaced by N,N-dimethylformamide (DMF).

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Abstract

The invention relates to a method for converting a carbon nanotube into a graphene quantum sheet and the graphene quantum sheet prepared by using the same. The method comprises the following steps: (1) mixing the carbon nanotube and a grinding auxiliary material so as to obtain a mixed crude product; and (2) mixing the mixed crude product obtained in the step (1) with a preliminary dispersion solvent, and carrying out ultrasonic treatment so as to obtain the graphene quantum sheet. The preparation method provided by the invention has the advantages of extensive source, high efficiency, environmental protection, simple operation, low cost, etc.; the graphene quantum sheet prepared by using the preparation method provided by the invention has high yield; and a powder sample of the graphene quantum sheet can be well dispersed in a variety of solvents, and a dispersion of the graphene quantum sheet can reach a concentration up to 100 mg/mL, so important values are achieved for practical application and large-scale production of the graphene quantum sheet.

Description

technical field [0001] The invention belongs to the technical field of preparation of inorganic nanometer materials, and in particular relates to a method for converting carbon nanotubes into graphene quantum sheets and the prepared graphene quantum sheets. Background technique [0002] Carbon nanotubes and graphene have attracted the attention of scientists since their discovery in 1991 and 2004, respectively. Due to their unique mechanical, optical, and electrical properties, they have quickly become research hotspots in the fields of physics, chemistry, and materials science. [0003] Carbon nanotubes are seamless, hollow, one-dimensional nanomaterials rolled from graphene, which can easily form multi-level aggregates under the combined influence of van der Waals force and entanglement. When 1D carbon nanotubes are transformed into 0D graphene quantum sheets (usually the lateral size is less than 20 nanometers), more edges and active sites will be exposed, thus having a l...

Claims

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Application Information

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IPC IPC(8): C01B32/19
Inventor 张勇徐元清梁程常金全
Owner THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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