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Method for preparing porous graphene microspheres through high-speed mixing technology

A technology of porous graphene and high-speed stirring, which is applied in the field of preparation of porous graphene microbeads, can solve problems such as the inability to prepare porous graphene with spherical structure, and achieves the effect of increasing curing rate and broad application prospects.

Inactive Publication Date: 2015-04-29
HEILONGJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention solves the problem that the prior art cannot prepare porous graphene with a spherical structure, and provides a method for preparing porous graphene microbeads using high-speed stirring technology

Method used

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  • Method for preparing porous graphene microspheres through high-speed mixing technology
  • Method for preparing porous graphene microspheres through high-speed mixing technology
  • Method for preparing porous graphene microspheres through high-speed mixing technology

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specific Embodiment approach 1

[0022] Specific embodiment one: a kind of method that utilizes high-speed stirring technology to prepare porous graphene microbead described in this embodiment, specifically is carried out according to the following steps:

[0023] 1. Mix polyvinylpyrrolidone powder, graphene oxide dry powder and silica microsphere dry powder to obtain a mixed powder, and then mix the mixed powder with deionized water to obtain a composite suspension;

[0024] The mass ratio of the polyvinylpyrrolidone powder to the graphene oxide dry powder is 1:(0.2~0.3); the mass ratio of the polyvinylpyrrolidone powder to the silica microsphere dry powder is 1:(0.5~1); The mass ratio of described mixed powder and deionized water is 1:(25~30);

[0025] 2. Add the composite suspension into a polypropylene microwave oven box filled with simethicone oil, stir magnetically for 2h-3h at a temperature of 80°C-90°C and a stirring speed of 400rpm-600rpm, and then solidify and form. Finally, stand and settle at roo...

specific Embodiment approach 2

[0035] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the mass ratio of polyvinylpyrrolidone powder and graphene oxide dry powder described in step 1 is 1:(0.2-0.28). Others are the same as in the first embodiment.

specific Embodiment approach 3

[0036] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the mass ratio of polyvinylpyrrolidone powder and silica microsphere dry powder described in step 1 is 1:(0.5-0.9). Others are the same as in the first or second embodiment.

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Abstract

The invention relates to a preparation method of porous graphene microspheres, discloses a method for preparing the porous graphene microspheres through a high-speed mixing technology and aims to solve the problem in the prior art that porous graphene with a spherical structure cannot be prepared. The method comprises the following steps: mixing polyvinylpyrrolidone powder, dried graphene oxide powder and dried silicon dioxide microsphere powder with deionized water to obtain composite suspension liquid, adding the composite suspension liquid into simethicone, performing high-speed mixing at a certain temperature, curing, forming, standing, precipitating, heating, curing, calcining, soaking in a hydrofluoric acid solution, and drying to obtain the porous graphene microspheres. The method is used for preparing the porous graphene microspheres through the high-speed mixing technology.

Description

technical field [0001] The invention relates to a preparation method of porous graphene microbeads. Background technique [0002] Carbon materials are the most widely used electrode materials in the field of supercapacitors because of their high specific surface area, good electrical conductivity, stable chemical properties, easy molding, low price, wide source of raw materials, and mature production technology. As a new type of nano-two-dimensional material, graphene exhibits many excellent physical properties, such as large specific surface area, good electrical conductivity, high thermal stability and high physical strength, and has become one of the most popular fields of research since its discovery. The discovery of graphene, a new carbon material, has played a great role in improving the performance of supercapacitor electrode materials. M.D.Stouer et al. used graphene as an electrode supercapacitor, and tested its specific capacitance in aqueous and organic electrol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04
Inventor 孙立国藏琳琳刘晖汪成张艳红
Owner HEILONGJIANG UNIV
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