A kind of method for preparing foamed graphene from antibiotic slag

A technology of antibiotic bacteria slag and foamed graphene, which is applied in the field of nanomaterials, can solve the problems of difficult control of doping amount, difficulty in commercial application, and difficulty in wide application, and achieve excellent electrochemical performance, excellent electrochemical performance, and easy The effect of mass production

Active Publication Date: 2022-05-06
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

③The gel method is a method of gelling the carbon precursor first, and then carbonizing it under inert conditions to prepare porous carbon. The process parameters of this method are easier to control, and the available porous carbon materials have different pore sizes. The surface area is relatively considerable, but the preparation cycle is long, the product performance is unstable, and it is difficult to realize commercial application
④ Template method is mainly divided into soft template method and hard template method. The soft template method refers to the use of surfactants in the reaction to form the precursor structure of carbon, and the template does not need to be removed; while the hard template method uses the existing template material, and then passes The template is removed by etching to obtain a porous carbon material. The carbon yield obtained by this method is high and the electrochemical performance is stable when used as an electrode material. At the same time, porous carbon materials with different pore sizes can be prepared by adjusting the size of the template, but the process is very complicated. , the prepared porous carbon has a single pore size, which is difficult to be widely used
However, there are problems such as high cost of raw materials, high requirements for equipment in the doping process, difficulty in controlling the doping amount, and escape of heteroatoms under high temperature operation.

Method used

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  • A kind of method for preparing foamed graphene from antibiotic slag
  • A kind of method for preparing foamed graphene from antibiotic slag
  • A kind of method for preparing foamed graphene from antibiotic slag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] ① Place the antibiotic bacteria residue in a vibrating mill and grind for 10 minutes to obtain the preliminary fine powdered antibiotic bacteria residue. Then put the previously obtained solid powder into an oven at 80-120°C for 24 hours, and dry it for later use;

[0062] ② Weigh 10g of dried antibiotic bacteria residue and 10g of potassium hydroxide, stir and disperse evenly with 60mL of ethanol, put it in a polytetrafluoroethylene tank, and then seal it in a stainless steel reactor, and then keep it in an oven at 200°C for about 12 hours ;

[0063] ③Separate the liquid-solid mixture obtained by ethanol heating in the previous step, add the liquid to hydrochloric acid for neutralization and dry to obtain the pretreated solid A; Same) to neutrality, oven dry, obtain pretreatment solid B;

[0064] ④ Step 4: Dissolve the solid powder obtained in the previous step (pretreatment solid B) in an appropriate amount of deionized water (the solid obtained by ethanol heat trea...

Embodiment 2

[0072] Compared with Example 1, the difference is only that the consumption of the alkali in step 4 all decreases, specifically:

[0073] ① Place the antibiotic bacteria residue in a vibrating mill and grind for 10 minutes to obtain the preliminary fine powdered antibiotic bacteria residue. Then put the previously obtained solid powder into an oven at 80-120°C for 24 hours, and dry it for later use;

[0074] ② Weigh 10g of dried antibiotic bacteria residue and 10g of potassium hydroxide, stir and disperse evenly with 60mL of ethanol, put it in a polytetrafluoroethylene tank, and then seal it in a stainless steel reactor, and then keep it in an oven at 200°C for about 12 hours ;

[0075] ③Separating the liquid-solid mixture obtained from the ethanol heating in the previous step, washing the separated solid (using ethanol washing), drying, and grinding into powder respectively for subsequent use;

[0076] ④ Step 4: Dissolve the solid powder obtained in the previous step in an ...

Embodiment 3

[0081] Compared with Example 1, the difference is mainly that the solvothermal solvent is methanol, specifically:

[0082] ① Place the antibiotic bacteria residue in a vibrating mill and grind for 10 minutes to obtain the preliminary fine powdered antibiotic bacteria residue. Then put the previously obtained solid powder into an oven at 80-120°C for 24 hours, and dry it for later use;

[0083] ② Weigh 10g of dried antibiotic bacteria residue and 10g of potassium hydroxide, stir and disperse evenly with 60mL of methanol, put it in a polytetrafluoroethylene tank, and then pack it in a stainless steel reactor, and then keep it in an oven at 200°C for about 12 hours ;

[0084] ③Separate the liquid-solid mixture obtained by heating methanol in the previous step, wash the solid with ethanol, dry it, and grind it into powder for subsequent use;

[0085] 4. Step 4: Dissolve the solid powder obtained in the previous step in an appropriate amount of deionized water (the solid produced...

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Abstract

The invention belongs to the technical field of recycling harmful solid waste and preparing electrode materials, and specifically discloses a method for preparing foamed graphene from antibiotic slag, including the following steps: step (1): making a solution containing antibiotic slag, alkali A, and alcohol Carrying out solvothermal pretreatment, followed by solid-liquid separation to obtain a pretreated product; Step (2): After mixing the pretreated product and alkali B, undergoing two-stage gradient heat treatment to obtain the foamed graphene; two-stage gradient heat treatment The process includes the first stage of heat treatment and the second stage of heat treatment in sequence, wherein the temperature of the first stage of heat treatment is 300-500°C; the temperature of the second stage of heat treatment is 600-1050°C. The invention realizes the high-value recycling of antibiotic residues from medical waste, is environmentally friendly, has a short preparation process, is very low in synthesis cost, and is suitable for large-scale production. When the prepared foamed graphene material is used for the negative electrode of lithium-ion batteries, It has the advantages of good conductivity, high capacity and good cycle stability.

Description

technical field [0001] The invention belongs to the technical field of nanometer materials, in particular to a resource utilization method based on antibiotic residues. Background technique [0002] At present, the secondary battery, which can quickly and efficiently convert and store energy, has become an important energy storage device, affecting the development of many fields such as human society, science and technology, and economy. Currently commonly used secondary batteries mainly include nickel-cadmium batteries, nickel-metal hydride batteries, lead-acid batteries and lithium-ion batteries. Among them, lithium-ion batteries have attracted the attention of researchers because of their excellent electrochemical performance, environmental protection, and resource conservation. At present, the commercial negative electrode material of lithium-ion batteries is graphite, which is mainly divided into natural graphite and artificial graphite. Graphite has excellent electri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/184H01M4/587H01M10/0525
CPCC01B32/184H01M4/587H01M10/0525H01M2004/027Y02E60/10
Inventor 唐晶晶周向阳郭龙龙杨娟王辉丁静王炯
Owner CENT SOUTH UNIV
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