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Preparation method of modified graphene oxide material

A graphene and modification technology, which is applied in the field of preparation of modified graphene oxide materials, achieves the effects of simple preparation methods and equipment, accelerated doping reactions, and improved preparation efficiency

Active Publication Date: 2019-08-16
新疆弘瑞达纤维有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In the prior art, there are very few studies on the modification of graphene oxide by doping metal ions, and only occasionally in some documents it is mentioned that graphene The mixed solution with AgNO3 is heated to 75°C to grow Ag onto graphene oxide (GO)

Method used

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  • Preparation method of modified graphene oxide material
  • Preparation method of modified graphene oxide material
  • Preparation method of modified graphene oxide material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Put 1 g of graphite powder and 23 mL of concentrated sulfuric acid (98% by mass) in a round bottom flask and stir for 5 min under an ice-water bath. Then, in an ice-water bath, 5 g of potassium permanganate was continuously added to the slurry for 2 hours while stirring. After the potassium permanganate was added, the slurry was stirred for 3 hours at room temperature, and then the mixture was aged at room temperature for 12 hours. After 12 hours, wash the mixed solution with deionized water to neutrality, then place the mixed solution obtained in the step in a closed container, pass high-temperature steam to pressurize to 1.5-2.5Mpa, keep the pressure for 3-5min, and then pressurize at 87.5 The pressure is released to normal pressure by flash opening the end cap of the closed container within a millisecond, and the material is sprayed into the collection bin with the steam; the collected product is constant volume, and a well-dispersed graphene oxide solution is obtaine...

Embodiment 2

[0036]Put 1 g of graphite powder and 23 mL of concentrated sulfuric acid (98% by mass) in a round bottom flask and stir for 5 min under an ice-water bath. Then, in an ice-water bath, 5 g of potassium permanganate was continuously added to the slurry for 2 hours while stirring. After the potassium permanganate was added, the slurry was stirred for 1 hour at room temperature, and then the mixture was aged at room temperature for 6 hours. Afterwards, the mixture was washed to neutral with deionized water, and then 0.08 g of CoCl was added to the solid slurry 2 • 6H2O, stir well. Then mix the mixed solution obtained in the step with the Co salt solution, stir evenly and place it in an airtight container, seal the airtight container, pass high-temperature steam to pressurize to 1.0-2.0Mpa, and keep the pressure reaction for 3-5min, Then release the pressure to normal pressure by flashing the end cap of the closed container within 87.5 milliseconds, and the material is sprayed into...

Embodiment 3

[0038] Put 1 g of graphite powder and 23 mL of concentrated sulfuric acid (98% by mass) in a round bottom flask and stir for 5 min under an ice-water bath. Then, in an ice-water bath, 5 g of potassium permanganate was continuously added to the slurry for 2 hours while stirring. After the addition of potassium permanganate was complete, the slurry was stirred at room temperature for 6 hours, and then the mixture was aged at room temperature for 18 hours. Afterwards, the mixture was washed to neutral with deionized water, and then 0.08 g of NiCl was added to the solid slurry 2 • 6H2O, stir well. Then mix the mixed solution obtained in the step with the Ni salt solution, stir evenly, and place it in a closed container, seal the closed container, pass high-temperature steam to pressurize to 1.5-2.5Mpa, and keep the pressure reaction for 1-3min, Then release the pressure to normal pressure by flashing the end cap of the closed container within 87.5 milliseconds, and the material i...

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Abstract

The invention belongs to the field of preparation of novel carbon materials, and concretely relates to a preparation method of a modified graphene oxide material. The preparation method comprises thefollowing steps: (1) mixing graphite powder with concentrated sulfuric acid (98 wt%) in an ice water bath, performing uniform stirring, continuously slowly adding potassium permanganate for 1-6 h, andcontinuously performing stirring at room temperature for 1-5 h, wherein a use amount ratio of the graphite powder to the concentrated sulfuric acid to potassium permanganate is 1 g: 23 mL: 5 g; (2) adding a transition metal salt solution, performing uniform stirring, placing the obtained solution in a closed container, introducing high-temperature water vapor to increase the pressure to 1.0-2.5 Mpa, carrying out a reaction under a pressure keeping condition for 1-5 min, releasing the pressure to normal pressure within 87.5 ms by opening the end cap of the closed container in a flashing manner, and spraying the obtained material into a collecting bin together with the vapor, wherein a molar ratio of the transition metal to graphite is 1:100; and (3) collecting the material, and washing thecollected material with deionized water to neutrality. The method has the advantages of fastness in a doping reaction, and uniformity and stability in doping, and the product has the advantages of improved electrochemical properties, high oxidation degree and good safety.

Description

technical field [0001] The invention belongs to the technical field of preparation of new carbon materials, and belongs to the field of non-metallic inorganic materials, in particular to a preparation method of a modified graphene oxide material. Background technique [0002] Graphene oxide (graphene oxide) is the oxide of graphene, its color is brownish yellow, and the common products are powder, flake and solution. Because of the increase in oxygen-containing functional groups after oxidation, the properties are more active than graphene, and its own properties can be improved through various reactions with oxygen-containing functional groups. [0003] Graphene oxide is a single atomic layer that can expand to tens of microns in lateral dimension at any time. As such, its structure spans typical scales of general chemistry and materials science. Graphene oxide can be regarded as an unconventional type of soft material with properties of polymers, colloids, films, and amp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/198
CPCC01B32/198C01P2006/40
Inventor 石勇任铁真陈琪鸿梁天华
Owner 新疆弘瑞达纤维有限公司
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