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Detonation preparation method of dispersible graphene quantum dot

A graphene quantum dot and dispersion technology, applied in the direction of graphene, nano-carbon, etc., can solve the problems of harsh synthesis conditions, complicated purification process, energy consumption and time consumption, and achieve high reproducibility, simple steps, and reduce pollution gas The generated effect of

Inactive Publication Date: 2019-02-22
YANCHENG TEACHERS UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above "shearing" methods have technologies such as low yield, long cycle time, complicated purification process, energy consumption and time, and harsh synthesis conditions.

Method used

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  • Detonation preparation method of dispersible graphene quantum dot
  • Detonation preparation method of dispersible graphene quantum dot

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Vacuum the inside of the explosion vessel, the pressure is less than 100Pa, use CO 2 Make a protective gas, ignite and detonate the powder column, discharge the exhaust gas after the product has settled, collect the nano-scale graphite powder on the inner wall and bottom of the container, wash it with deionized water until neutral, dry it and store it in a desiccator.

[0025] (2) Add 1 g of graphite powder and 5 g of sodium chlorate into 50 mL of concentrated sulfuric acid, and stir for 6 h in an ice bath.

[0026] (3) Oxygen-containing functional groups are modified on the edges of graphite particles, and the reaction product is centrifugally cleaned and then added to water or an organic solvent for ultrasonic treatment to obtain graphene quantum dots.

[0027] (4) The reaction product is filtered and washed, and the reaction product is dispersed in a solution such as N-methylpyrrolidone with an ultrasonic cell disruptor, and the ultrasonic treatment time is 1 h. ...

Embodiment 2

[0029] (1) Vacuum the inside of the explosion container, the pressure is less than 100Pa, use Ar as the protective gas, ignite and detonate the powder column, discharge the waste gas after the product settles, collect the nano-scale graphite powder on the inner wall and bottom of the container, and use deionized Wash to neutral, dry and store in a desiccator.

[0030] (2) Add 1 g of graphite powder and 8 g of sodium chlorate into 50 mL of concentrated sulfuric acid, and stir for 4 h in an ice bath.

[0031] (3) Oxygen-containing functional groups are modified on the edges of graphite particles, and the reaction product is centrifugally cleaned and then added to water or an organic solvent for ultrasonic treatment to obtain graphene quantum dots.

[0032] (4) The reaction product is filtered and washed, and the reaction product is dispersed in a solution such as N-methylpyrrolidone with an ultrasonic cell disruptor, and the ultrasonic treatment time is 1 h.

Embodiment 3

[0034] (1) Vacuum the inside of the explosion container, the pressure is less than 100Pa, use Ar as the protective gas, ignite and detonate the powder column, discharge the waste gas after the product settles, collect the nano-scale graphite powder on the inner wall and bottom of the container, and use deionized Wash to neutral, dry and store in a desiccator.

[0035] (2) Add 1 g of graphite powder and 6 g of sodium chlorate into 50 mL of concentrated sulfuric acid, and stir for 6 h in an ice bath.

[0036] (3) Oxygen-containing functional groups are modified on the edges of graphite particles, and the reaction product is centrifugally cleaned and then added to water or an organic solvent for ultrasonic treatment to obtain graphene quantum dots.

[0037] (4) The reaction product was filtered and washed, and the reaction product was dispersed in a solution such as N-methylpyrrolidone with an ultrasonic cell disruptor, and the ultrasonic treatment time was 2 h.

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Abstract

The invention provides a detonation preparation method of a dispersible graphene quantum dot. The detonation preparation method comprises the steps: preparing a graphite particle with the particle size of 1-20 nm by using a detonation method; modifying the edge of the graphite particle with an oxygen-containing functional group by utilizing sodium chlorate and concentrated sulfuric acid; and carrying out ultrasonic treatment to obtain the dispersible graphene quantum dot. The size of the graphite particle efficiently prepared by using the detonation method is just within the range of the graphene quantum dot, and the graphite particle of which the edge is modified with the oxygen-containing functional group is easier to strip to form the graphene quantum dot and can be stably dispersed into water or an organic solvent. The detonation preparation method provided by the invention is suitable for industrial production, has the advantages such as simplicity in control, simple step and highyield, huge energy consumption is not needed, and produced pollution gases can be reduced.

Description

technical field [0001] The invention relates to the field of preparation of graphene quantum dots, in particular to a detonation method for preparing dispersible graphene quantum dots. Background technique [0002] Graphene quantum dots are quasi-zero-dimensional nanomaterials, which exhibit many new physical and chemical properties due to boundary effects and quantum confinement effects, and have important scientific research significance in the fields of energy storage, biomedicine, photoelectric conversion, and electromagnetism. It also has potential application value in the fields of biology, medicine, materials, and new semiconductor devices. [0003] At present, the main way to prepare graphene quantum dots is to exfoliate graphite into graphene oxide or graphene and then "shear" it into small-sized graphene quantum dots, but adopt different methods for "shearing", for example Hydrothermal method, solvothermal method, strong acid oxidation method, stripping method, el...

Claims

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Application Information

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IPC IPC(8): C01B32/19
CPCC01B32/19
Inventor 苗中正汤复瑶江宇
Owner YANCHENG TEACHERS UNIV