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Graphene spherical assembly and preparation method thereof

An assembly and graphene technology, applied in the direction of graphene, nano-carbon, etc., can solve the problems of complex process, high cost, unfavorable industrialization, etc., and achieve the effect of simple process, high purity and yield, and low requirements for reaction equipment

Inactive Publication Date: 2012-12-05
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above methods are the process of firstly preparing graphite oxide, then obtaining graphene oxide assembly from graphite oxide, and finally reducing it to a graphene assembly process. The process is complicated and the cost is high, which is not conducive to the realization of industrialization.

Method used

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  • Graphene spherical assembly and preparation method thereof
  • Graphene spherical assembly and preparation method thereof
  • Graphene spherical assembly and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0023] Take by weighing 3.37g ferrocene (Fe(C 5 h 5 ) 2), 3.91g of o-cresol and 1.74g of sublimed sulfur were stirred and mixed (atomic ratio Fe:S=1:3), and then the mixture was transferred into the reactor, and the reactor was filled with benzene and sealed with a cover. Place the reaction kettle in a 700-watt ultrasonic water bath and vibrate for 30 minutes, take it out and put it in a constant temperature oven at 200°C for 48 hours. After the reaction kettle is naturally cooled to room temperature, the product is suction-filtered, and the obtained solid product is under the protection of nitrogen flow. Carbonization treatment was carried out at 1000°C for 2 hours to obtain a black solid powder. Put the powder in excess 5M hydrochloric acid solution and stir for 72 hours, then filter with suction and wash the filtrate with a large amount of deionized water until the pH value of the eluate is equal to 7, and then dry the filtrate under vacuum at 80°C That is, a graphene sp...

Embodiment 2

[0030] Weigh 4.89g ferric chloride (FeCl 3 ·6H 2 O), 3.91g of o-cresol and 5.80g of sublimed sulfur were stirred and mixed (atomic ratio Fe:S=1:10), and then the mixture was transferred into a reactor, and the reactor was filled with benzene and sealed with a cover. Place the reaction kettle in a 700-watt ultrasonic water bath and vibrate for 30 minutes, take it out and put it in a constant temperature oven at 250°C for 4 hours. After the reaction kettle is naturally cooled to room temperature, the product is suction-filtered, and the obtained solid product is carried out under the protection of nitrogen flow. Carbonization treatment was carried out at 600°C for 2 hours to obtain a black solid powder. Put the powder in excess 5M hydrochloric acid solution and stir for 72 hours, then filter with suction and wash the filtrate with a large amount of deionized water until the pH value of the eluate is equal to 7, and then dry the filtrate under vacuum at 80°C That is, a graphene...

Embodiment 3

[0033] Take by weighing 7.32g ferric nitrate (Fe(NO 3 ) 3 9H 2 O), 3.98g of catechol and 0.58g of sublimed sulfur were stirred and mixed (atomic ratio Fe:S=1:1), and then the mixture was transferred into a reactor, and the reactor was filled with benzene and sealed with a cover. Place the reaction kettle in a 700-watt ultrasonic water bath and vibrate for 30 minutes, take it out and put it in a constant temperature oven at 200°C for 60 hours. After the reaction kettle is naturally cooled to room temperature, the product is suction-filtered, and the obtained solid product is under the protection of nitrogen flow. Carbonization treatment was carried out at 800°C for 2 hours to obtain a black solid powder. Put the powder in excess 5M hydrochloric acid solution and stir for 72 hours, then filter with suction and wash the filtrate with a large amount of deionized water until the pH value of the eluate is equal to 7, and then dry the filtrate under vacuum at 80°C That is, a graph...

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Abstract

The invention relates to a grapheme spherical assembly and a preparation method thereof. The method comprises the following steps: performing solvothermal reaction by taking an iron catalyst, sublimed sulfur and organic phenols as reactants; and performing the subsequent carbonization treatment and acid treatment to obtain the grapheme spherical assembly with uniform diameter distribution. The process is simple, the preparation cost of materials is low, and the purity is high. Experimental results show that the grapheme material has good lithium storage performance in a lithium battery.

Description

technical field [0001] The invention relates to the technical field of new materials, in particular to a method for preparing a graphene assembly. Background technique [0002] Graphene is a new material with a single-layer sheet structure composed of carbon atoms. is a carbon atom with sp 2 The hybridized orbitals form a hexagonal planar film with a honeycomb lattice, a two-dimensional material with a thickness of only one carbon atom. Graphene is currently the thinnest but also the hardest nanomaterial in the world. It is almost completely transparent and only absorbs 2.3% of light; its thermal conductivity is as high as 5300W / m·K, which is higher than that of carbon nanotubes and diamonds. Electron mobility over 15000cm 2 / V s, which is higher than that of carbon nanotubes or silicon crystals; the resistivity is only about 10 -6 Ω·cm, which is lower than copper or silver, and is currently the material with the smallest room temperature resistivity in the world. Becau...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04C01B32/184
Inventor 宋怀河武斌陈晓红
Owner BEIJING UNIV OF CHEM TECH
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