Preparation method of porous spongy graphene

A porous sponge and graphene technology, applied in the field of graphene, can solve the problems of poor adsorption effect and reduction of graphene specific surface area, achieve high porosity and adsorption rate, and protect the living and working environment

Inactive Publication Date: 2017-01-25
碳为(北京)新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, graphene itself is hydrophobic, and it is easy to agglomerate in water, resulting in a decrease in the specific surface area of ​​graphene and poor adsorption effect.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0016] A kind of preparation method of porous spongy graphene provided by the invention comprises the following steps:

[0017] Put the graphite powder into the reaction container, then add concentrated sulfuric acid, stir and mix well, then add ammonium persulfate, hydrogen peroxide and thiourea, and react at room temperature to obtain spongy graphene;

[0018] The prepared graphene sponge is soaked in dewatered water and dried to obtain porous spongy graphene.

[0019] The present invention uses graphite, concentrated sulfuric acid, ammonium persulfate, hydrogen peroxide and thiourea as raw materials to prepare porous spongy graphene, wherein ammonium persulfate and hydrogen peroxide can decompose gases such as ammonia during the reaction process, and the molecular structure of the graphite layer Intercalated some nitrogen / oxygen functional groups. The porous spongy graphene prepared by the intercalation method in the present invention has high porosity, adsorption rate, ri...

Embodiment 1

[0027] Put 50g of graphite powder with a size of 30 mesh into the reaction vessel, then add 500g of concentrated sulfuric acid with a mass concentration of 98%, stir and mix well, then add 40g of ammonium persulfate, 100g of hydrogen peroxide and 50g of thiourea, Reaction 3h makes spongy graphene;

[0028] After the prepared graphene sponge is put into deionized water and soaked for 18 hours, it is dried to obtain porous spongy graphene.

[0029] Utilize graphene porosity distribution measuring instrument to test the porosity of the porous spongy graphene that embodiment 1 makes, porosity is 55%; Use XRD tester and high-resolution transmission electron microscope to prove that product is graphene, can confirm carbon ring sheet The number of layers stacked is basically distributed between 3 and 5 layers and there are many single-layer or double-layer graphene structures.

[0030] The porous spongy graphene prepared in Example 1 is put into the dye N,N-dimethylformamide solutio...

Embodiment 2

[0032] Put 50g of graphite powder with a size of 300 mesh into the reaction vessel, then add 750g of concentrated sulfuric acid with a mass concentration of 98%, stir and mix well, then add 75g of ammonium persulfate, 150g of hydrogen peroxide and 100g of thiourea. Reaction 5h makes spongy graphene;

[0033] The prepared graphene sponge is soaked in deionized water for 30 hours, and then dried to obtain porous sponge-like graphene.

[0034] Utilize the graphene porosity distribution measuring instrument to test the porosity of the porous spongy graphene that embodiment 2 makes, and the porosity is 58%; Use XRD tester and high-resolution transmission electron microscope to prove that product is graphene, can confirm carbon ring sheet The number of layers stacked is basically distributed between 4 and 6 layers and there are many single-layer or double-layer graphene structures.

[0035] The porous spongy graphene that embodiment 2 makes is put into gasoline, after 10min, gasoli...

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Abstract

The invention discloses a preparation method of porous spongy graphene. The preparation method comprises the following steps: putting graphite powder into a reaction vessel, adding concentrated sulfuric acid, sufficiently stirring and uniformly mixing, then adding ammonium persulfate, oxydol and thiocarbamide, and reacting at normal temperature to obtain spongy graphene; and putting the obtained spongy graphene in deionized water, soaking, and drying to obtain the porous spongy graphene. According to the invention, the porous spongy graphene is prepared from the graphite, concentrated sulfuric acid, ammonium persulfate, oxydol and thiocarbamide which are used as raw materials, wherein the ammonium persulfate and oxydol H2O2 can be decomposed to release ammonia gas and other gas in the reaction process, and some nitrogen/oxygen functional groups can be inserted between graphite layer molecular structures, so that the surface structure of the graphene is changed, thereby achieving high porosity and adsorption rate, being capable of adsorbing and eliminating pollutants in sewage, improving water quality of underground water, surface water and sewage, and protecting living and working environments; and the porous spongy graphene can adsorb various kinds of dye, oil and organic solvent.

Description

technical field [0001] The invention relates to the field of graphene, in particular to a method for preparing porous spongy graphene. Background technique [0002] In recent years, with the development of the economy and the advancement of science and technology, the call for environmental protection has been increasing, and the standards for environmental protection have also been continuously improved. Higher standards have also been proposed for the treatment of a large amount of industrial wastewater and domestic sewage. Not only must the discharge of sewage be greatly reduced, the water environment shall be protected, but water conservation shall also be required. As a physical and chemical method, adsorption is an important treatment method in sewage treatment, which has the advantages of low cost, good selectivity, and easy regeneration. Adsorption materials with high specific surface area, stable chemical properties and low price are the key part of determining the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/28B01J20/30C02F1/28C02F101/32C02F101/34C02F101/38
CPCB01J20/205C02F1/281C02F1/288B01J20/28095C02F2101/34C02F2101/40C02F2101/38C02F2101/308C02F2101/32
Inventor 费晓波
Owner 碳为(北京)新材料科技有限公司
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