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Graphene oxide quantum dot solution and preparation method thereof

A technology of graphene quantum dots and solutions, applied in chemical instruments and methods, inorganic chemistry, carbon compounds, etc., to achieve excellent physical properties, improved performance, convenient operation and control

Inactive Publication Date: 2019-07-02
HUBEI ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention aims at the above-mentioned technical problem that faces, provides a kind of preparation method of graphene oxide quantum dot solution, to solve the various problems that the existing preparation of graphene oxide quantum dot solution faces

Method used

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  • Graphene oxide quantum dot solution and preparation method thereof
  • Graphene oxide quantum dot solution and preparation method thereof
  • Graphene oxide quantum dot solution and preparation method thereof

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preparation example Construction

[0028] The invention provides a kind of preparation method of graphene oxide quantum dot solution, comprises the steps:

[0029] 1) expanding the expanded graphite at high temperature to obtain graphite worms;

[0030] 2) shearing the graphite worms described in step 1), and then uniformly dispersing them in a solvent containing a polymer dispersant to obtain a graphite worm dispersion;

[0031] 3) using a laser beam to irradiate the graphite worm dispersion in step 2) to obtain a graphite worm suspension;

[0032] 4) Centrifuge and filter the graphite worm suspension described in step 3 to obtain a graphene oxide quantum dot solution.

[0033] On the basis of the above-mentioned technical solutions, the present invention may also have the following further specific selections or optimization selections.

[0034] Specifically, the expansion temperature of the expanded graphite is 900-1100 degrees Celsius, preferably 1000 degrees Celsius.

[0035] Specifically, the expanded ...

Embodiment 1

[0044] Expand the expanded graphite with a mesh number of 100 and an expansion ratio of 100 times at 900 degrees Celsius to obtain graphite worms, and uniformly disperse the graphite worms into an aqueous solution containing pvp at a mass concentration of 0.5%, so that the mass percentage of graphite worms is 2%. , the laser beam with a wavelength of 10nm, an energy of 2000mJ, and a pulse frequency range of 30Hz is irradiated into the graphite worm dispersion (the processing capacity is 3kg / h powder), and the obtained suspension is centrifugally filtered. The speed of the centrifuge is 8000r / min, the centrifugation time is 20min, and the graphene oxide quantum dot solution is obtained.

Embodiment 2

[0046] Expand graphite with a mesh number of 2000 and an expansion rate of 500 times at 1100 degrees Celsius to obtain graphite worms, and uniformly disperse the graphite worms into a 0.5% NMP solution containing cmc so that the mass percentage of graphite worms is 2 %, irradiate a laser beam with a wavelength of 50nm, an energy of 2500mJ, and a pulse frequency range of 70Hz into the dispersion of graphite worms (the processing capacity is 4kg / h powder), and the obtained suspension is centrifugally filtered, and the speed of the centrifuge is 9000r / min, and the centrifugation time is 30min to obtain a graphene oxide quantum dot solution.

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Abstract

The invention provides a preparation method of a graphene oxide quantum dot solution. The method comprises the following steps: 1) expanding expanded graphite at a high temperature to obtain graphiteworm; 2) shearing the graphite worm obtained in step 1), and uniformly dispersing the sheared graphite worm in a solvent containing a polymeric dispersant in order to obtain a graphite worm dispersion; 3) irradiating the graphite worm dispersion obtained in step 2) with a laser beam in order to obtain a graphite worm suspension; and 4) centrifuging and filtering the graphite worm suspension obtained in step 3) in order to obtain a graphene oxide quantum dot solution. The graphene oxide quantum dot solution prepared in the invention has excellent physical properties, nanometer size and chemicaluniversality, and the graphene oxide quantum dot solution dispersed by the method can be used as an additive of a composite material to remarkably improve the performances of the material.

Description

technical field [0001] The invention belongs to the technical field of new materials, and in particular relates to a graphene oxide quantum dot solution and a preparation method thereof. Background technique [0002] Graphene oxide, as a new type of carbon material with excellent performance, has a high specific surface area and abundant functional groups on the surface, and has a wide range of applications. Compared with two-dimensional graphene nanosheets, the zero-dimensional graphene oxide quantum dot solution exhibits stronger quantum confinement effects and boundary effects below 10nm, and is widely used in many fields such as photovoltaic devices, biomedicine, etc. , Light-emitting diodes and sensors have more attractive application prospects. [0003] At present, the preparation of graphene oxide quantum dot solution mainly adopts top-down and bottom-up methods, both of which involve complex synthesis and separation processes, and the operation process is complicate...

Claims

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Application Information

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IPC IPC(8): C01B32/198
CPCC01B32/198
Inventor 杜军王锋丁瑜杨雄付争兵
Owner HUBEI ENG UNIV
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