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Aperture-controllable porous graphene nanometer material preparation method

A technology of porous graphene and nanomaterials, applied in graphene, nanocarbon, chemical instruments and methods, etc., can solve the problems of template material residue, high cost energy consumption, difficult to control pore size, etc., to improve utilization efficiency and reduce production. Cost, effect of high charge capacity

Inactive Publication Date: 2018-08-24
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, the methods for preparing porous graphene nanomaterials mainly include high-energy ion beam bombardment, template method and chemical etching, etc., the pore size is difficult to control, and it is also difficult to achieve mass production.
In addition, these existing synthesis methods have some inevitable defects, which directly limit some special applications.
For example, the method of directly bombarding the surface of graphene with electron beams, helium ion beams, etc. to obtain porous graphene requires a very high energy source to create a hole structure on the surface of graphene, which means higher costs and energy consumption
For the template method, whether it is template etching or template growth, although this method can realize large-scale pore structure manufacturing and its pore size can be well controlled, the preparation process itself is cumbersome, and the residue of template materials is a problem. an unavoidable problem

Method used

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  • Aperture-controllable porous graphene nanometer material preparation method
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  • Aperture-controllable porous graphene nanometer material preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Example 1, Combustion under different time conditions prepares porous graphene nanomaterials

[0022] (1) Prepare 200 mL of 5 g / L graphene oxide suspension, and ultrasonicate at room temperature for 3 h for later use;

[0023] (2) Weigh 1 g of zinc nitrate, add 3 mL of water to dissolve it, add 1 mL of 5 g / L graphene oxide suspension, mix and sonicate for 10 min;

[0024] (3) Suction filter the mixed solution in step (2) onto quantitative filter paper using a Buchner funnel;

[0025] (4) Put the filter paper loaded with graphene oxide and zinc nitrate into an oven to dry at 60°C;

[0026] (5) Set the temperature of the muffle furnace to 400°C, 450°C, 500°C, and 550°C respectively. After the furnace temperature rises to the set temperature, put the dried filter paper into the muffle furnace and burn it for 1 minute before taking it out. product;

[0027] (6) Wash the burned product with hydrochloric acid to remove zinc oxide, and then wash with distilled water to remo...

Embodiment 2

[0031] Embodiment 2, combustion preparation porous graphene nanomaterial under different time conditions

[0032] (1) Prepare 200 mL of 5 g / L graphene oxide suspension, and ultrasonicate at room temperature for 3 h for later use;

[0033] (2) Weigh 1 g of zinc nitrate, add 3 mL of water to dissolve it, add 1 mL of 5 g / L graphene oxide suspension, mix and sonicate for 10 min;

[0034] (3) Suction filter the mixed solution in step (2) onto quantitative filter paper using a Buchner funnel;

[0035] (4) Put the filter paper loaded with graphene oxide and zinc nitrate into an oven to dry at 60°C;

[0036] (5) Set the temperature of the muffle furnace to 450 °C. After the furnace temperature rises to the set temperature, put the dried filter paper into the muffle furnace, burn for 1 min and 10 min respectively, and then take out the product;

[0037] (6) Wash the burned product with hydrochloric acid to remove zinc oxide, and then wash with distilled water to remove hydrochloric a...

Embodiment 3

[0039] Example 3, preparation of porous graphene nanomaterials under different mass ratios of graphene and zinc nitrate

[0040] (1) Prepare 200 mL of 5 g / L graphene oxide suspension, and ultrasonicate at room temperature for 3 h for later use;

[0041] (2) Weigh 1 g, 3 g, and 6 g of zinc nitrate (corresponding to graphene:zinc nitrate mass ratios of 1:200, 1:600, and 1:1200, respectively), add 3 mL of water to dissolve, and add to Add 1 mL of 5 g / L graphene oxide suspension, mix and sonicate for 10 min;

[0042] (3) Use a Buchner funnel to suction filter the mixed solution in step (2) onto quantitative filter paper;

[0043] (4) Put the filter paper loaded with graphene oxide and zinc nitrate into an oven to dry at 60°C;

[0044] (5) Set the temperature of the muffle furnace to 450°C. After the furnace temperature rises to the set temperature, put the dried filter paper into the muffle furnace, burn for 1 min, and take out the product;

[0045] (6) Wash the burned product ...

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Abstract

The invention discloses an aperture-controllable porous graphene nanometer material preparation method. The method comprises the steps that graphene oxide is subjected to ultrasonic dispersion in water to form a graphene oxide suspension which is mixed with a nearly saturated zinc nitrate solution, ultrasonography continues to be conducted to make the mixture mixed to be uniform; extraction filtration is conducted, graphene oxide and zinc nitrate are intercepted on filter paper, and a defective zinc salt template covers the surface of graphene oxide; the filter paper loaded with graphene oxideand zinc nitrate is dried and placed in a muffle furnace to be burned, exposed graphene oxide in a defective hole is burned completely in the high-temperature environment, zinc nitrate is subjected to thermal decomposition in the high-temperature environment to be zinc oxide, zinc oxide is removed by means of hydrochloric acid, and then porous graphene is obtained successfully. Accordingly, by means of control over the burning temperature, time and salt content in the muffle furnace, porous graphene nanometer materials with different apertures are obtained, and then the preparation cost of porous graphene is greatly lowered, and the utilization efficiency is improved.

Description

technical field [0001] The invention relates to a preparation method of a porous graphene nano material, in particular to a preparation method of a porous graphene nano material with controllable aperture. Background technique [0002] Graphene is a new type of carbon material developed recently, which has an open energy band gap, a large specific surface area, and high mechanical strength. However, graphene is prone to agglomeration due to the effect of π-π electrons, which leads to a significant decrease in the effective specific surface area. Porous graphene is a derivative of graphene. The pores in the material are the vacancies left by carbon atoms being removed from the lattice or transferred to the surface. The introduction of pores not only solves the disadvantage that graphene is prone to agglomeration In terms of performance, it also combines the characteristics of graphene and porous carbon well. Its good electrical conductivity and chemical stability enable it t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/184H01G11/24H01G11/36
CPCC01B2204/04C01B2204/22C01B2204/32C01B32/184H01G11/24H01G11/36Y02E60/13
Inventor 王莉李湛陈佳邱洪灯
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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