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Low-temperature environment-friendly method for preparing in-plane porous few-layer graphene material

A low-layer graphene and environmentally friendly technology, applied in the field of carbon nanomaterials, can solve problems such as pollution, complex and time-consuming process, and non-environmental protection, and achieve the effects of reducing complex process, fast ion transmission, and low cost

Pending Publication Date: 2022-04-29
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although porous graphene with uniform pore size distribution can be produced, this method needs to be dissolved in a solvent and evaporated to dryness. The process is complicated and time-consuming, and the volatilization of organic solvents is easy to cause pollution and is not environmentally friendly.

Method used

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  • Low-temperature environment-friendly method for preparing in-plane porous few-layer graphene material
  • Low-temperature environment-friendly method for preparing in-plane porous few-layer graphene material
  • Low-temperature environment-friendly method for preparing in-plane porous few-layer graphene material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045]A low-temperature and environmentally friendly method for preparing in-plane porous few-layer graphene is realized by the following steps:

[0046] 1) Weigh 6 g of commercial iron acetylacetonate, 12 g of sodium chloride, and 360 g of zirconia balls. Put the three into a ball mill jar with a volume of 1000mL, then install the ball mill jar on a planetary ball mill, and mill for 4 hours at a speed of 400r / min;

[0047] 2) heating the ball-milled product obtained in step 1) to 700°C at 5°C / min under an argon atmosphere in a tube furnace, and keeping it warm for 4 hours;

[0048] 3) Take out the carbonized product in step 2) and put it into a high-pressure reactor, add 80 mL of hydrochloric acid with a concentration of 3 mol / L, put it into an electric blast drying oven, and pickle it at 80°C for 12 hours;

[0049] 4) The material obtained in step 3) is washed and dried to obtain the in-plane porous few-layer graphene of the target sample.

[0050] The in-plane porous few-...

Embodiment 2

[0065] A low-temperature and environmentally friendly method for preparing in-plane porous few-layer graphene is realized by the following steps:

[0066] 1) Weigh 5 g of commercial cobalt acetylacetonate, 7.5 g of potassium chloride, and 200 g of zirconia. Put the three into a ball mill jar with a volume of 1000mL, then install the ball mill jar on the planetary ball mill, and ball mill for 6 hours at a speed of 300r / min;

[0067] 2) heating the ball-milled product obtained in step 1) to 800°C at 8°C / min under an argon atmosphere in a tube furnace, and keeping it warm for 3 hours;

[0068] 3) Take out the carbonized product in step 2) and put it into a high-pressure reactor, add 80 mL of hydrochloric acid with a concentration of 2 mol / L, put it into an electric blast drying oven, and pickle it at 120°C for 15 hours;

[0069] 4) The material obtained in step 3) is washed and dried to obtain the in-plane porous few-layer graphene of the target sample.

[0070] The in-plane po...

Embodiment 3

[0073] A low-temperature and environmentally friendly method for preparing in-plane porous few-layer graphene is realized by the following steps:

[0074] 1) Weigh 5 g of commercial nickel acetylacetonate, 12.5 g of sucrose, and 175 g of zirconia. Put the three into a ball mill jar with a volume of 1000mL, then install the ball mill jar on a planetary ball mill, and mill for 3 hours at a speed of 500r / min;

[0075] 2) heating the ball-milled product obtained in step 1) to 900°C at 10°C / min under an argon atmosphere in a tube furnace, and keeping it warm for 2 hours;

[0076] 3) Take out the carbonized product in step 2) and put it into a high-pressure reactor, add 80 mL of hydrochloric acid with a concentration of 4 mol / L, put it in an electric blast drying oven, and pickle it at 25 ° C for 10 h;

[0077] 4) The material obtained in step 3) is washed and dried to obtain the in-plane porous few-layer graphene of the target sample.

[0078] The in-plane porous few-layer graphe...

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Abstract

The invention discloses a low-temperature environment-friendly method for preparing an in-plane porous few-layer graphene material. The method comprises the following steps: mixing a carbon source, a grinding agent and grinding balls, and grinding with a ball mill; the carbon source is a transition metal organic compound; the grinding agent is a cubic structure crystal with water solubility; under a protective atmosphere, carrying out heating carbonization treatment on the obtained material; adding an acid solution into the obtained material, and washing off metal; and washing and drying the obtained material to obtain the in-plane porous few-layer graphene. The preparation method is simple and easy to implement, small in pollution, low in cost and high in efficiency, the prepared few-layer graphene has a rich in-plane porous structure, the number of layers is 2-20, the specific surface area is 50-1000 m < 2 > / g, the pore diameter is 1-40 nm, and the few-layer graphene can be applied to the fields of conductive agents, catalyst carriers, batteries, supercapacitors, high-performance transistors, sensors and the like.

Description

technical field [0001] The invention relates to graphene, in particular to a low-temperature and environment-friendly method for preparing in-plane porous few-layer graphene material; it belongs to the technical field of carbon nanomaterials. Background technique [0002] With the adjustment of my country's energy structure, we need to actively develop clean, low-carbon new energy sources, and find a suitable material to build a more efficient and lower-cost energy storage system. Graphene is a new material with a honeycomb crystal structure, which has many unique physical and chemical properties, such as ultra-high specific surface area, excellent thermal stability, good thermal conductivity, ultra-high electron transport capacity and super mechanical properties Wait. However, the stacking of graphene sheets during the electrode preparation process adversely affects the ion transport kinetics and active surface area, seriously hindering its practical application. [0003]...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/184
CPCC01B32/184
Inventor 严玉蓉李桂兰吴松平纪沫
Owner SOUTH CHINA UNIV OF TECH
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