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Preparation method and application of graphene-based aerogel

A graphene-based and aerogel technology, applied in chemical instruments and methods, other chemical processes, inorganic chemistry, etc., can solve the problems of high cost, difficult control, high technical requirements, etc., achieve high speed, enhance stability, and process simple effect

Active Publication Date: 2019-03-22
ZHEJIANG FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems of high cost, high technical requirements and difficult control of the current production method of graphene airgel, the present invention proposes a preparation method of graphene-based airgel and its ability to absorb organic pollutants in water. application

Method used

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  • Preparation method and application of graphene-based aerogel

Examples

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Effect test

Embodiment 1

[0038] (1) Graphene oxide GO prepared by Hummers method

[0039] Add 12mL of 98% concentrated sulfuric acid to a dry beaker, place the beaker in an ice-water bath, then add 0.5g of graphite powder and 0.25g of anhydrous NaNO 3, slowly add 1.5g of potassium permanganate under strong stirring, control the temperature below 20°C, stir for 2h, then place the beaker in a constant temperature water bath at 35°C (±3°C), heat up to 35°C and continue stirring for 30min. Place the beaker in an oil bath at 98°C, add deionized water continuously while stirring, make sure that the temperature of the suspension does not exceed 100°C, keep stirring for 15 minutes, dilute the above suspension with 70mL of deionized water, and then add an appropriate amount of 30% hydrogen peroxide Reduce the remaining potassium permanganate and the insoluble manganese dioxide produced to make them into colorless and soluble manganese sulfate. Under the treatment of hydrogen peroxide, the suspension becomes br...

Embodiment 2

[0045] (1) Graphene oxide GO prepared by Hummers method

[0046] Add 24mL of 98% concentrated sulfuric acid to a dry beaker, place the beaker in an ice-water bath, then add 1g of graphite powder and 0.5g of anhydrous NaNO 3 , slowly add 3g of potassium permanganate under strong stirring, control the temperature below 20°C, stir for 2.5h, then place the beaker in a constant temperature water bath at 35°C (±3°C), heat up to 35°C and continue stirring for 30min. Place the beaker in an oil bath at 98°C, add deionized water continuously while stirring, make sure that the temperature of the suspension does not exceed 100°C, keep stirring for 15 minutes, dilute the above suspension with 140mL deionized water, and then add an appropriate amount of 30% hydrogen peroxide Reduce the remaining potassium permanganate and the resulting insoluble manganese dioxide to make them into colorless and soluble manganese sulfate. Under the treatment of hydrogen peroxide, the suspension becomes brigh...

Embodiment 3

[0052] (1) Graphene oxide GO prepared by Hummers method

[0053] Add 24mL of 98% concentrated sulfuric acid to a dry beaker, place the beaker in an ice-water bath, then add 1.5g of graphite powder and 0.75g of anhydrous NaNO 3 , under strong stirring, slowly add 4.5g of potassium permanganate, control the temperature below 20°C, stir for 3h, then place the beaker in a constant temperature water bath at 35°C (±3°C), heat up to 35°C and continue stirring for 30min. Place the beaker in an oil bath at 98°C, add deionized water continuously while stirring, make sure that the temperature of the suspension does not exceed 100°C, keep stirring for 15 minutes, dilute the suspension with 210mL of deionized water, and then add an appropriate amount of 30% hydrogen peroxide Reduce the remaining potassium permanganate and the resulting insoluble manganese dioxide to make them into colorless and soluble manganese sulfate. Under the treatment of hydrogen peroxide, the suspension becomes brig...

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Abstract

The invention relates to the technical field of graphene aerogel. Aiming at solving the problems of an existing manufacturing method of the graphene aerogel that the cost is relatively high, technicalrequirements are relatively high and the manufacturing method is not easy to control, the invention provides a preparation method of graphene-based aerogel and application of the graphene-based aerogel to adsorption of organic pollutants in water. The preparation method comprises the following steps: (1) preparing graphene oxide GO; (2) preparing graphene oxide loaded zero-valent iron powder Fe<0> / rGO; (3) preparing an EDTA-2Na (disodium ethylene diamine tetraacetate acid) and chitosan (CS) modified Fe<0> / rGO functional material (Fe<0> / rGEC). The preparation method provided by the invention has the advantages that the source of raw materials is abundant, the price is cheap, and the technology is simple and environmentally friendly and has no toxic and harmful effect on human bodies.

Description

technical field [0001] The invention relates to the technical field of graphene airgel, in particular to a preparation method and application of graphene-based airgel. Background technique [0002] With the rapid development of China's dye industry, the scope of application of dyes has gradually expanded. It is not only used to decorate clothing, beautify life and the environment, but also as a part of the chemical industry, which has become an important branch. Most dyes are synthesized from chemical products. Aromatic compounds have a large annual output, 10%-15% of which are discharged into wastewater; dyes are chemically stable and have potential carcinogenic effects, which pose a serious threat to humans and the ecological environment. Therefore, industrial dye wastewater The treatment of dyes and the degradation and removal of fuel pollution in environmental water have attracted widespread attention. Various methods such as adsorption, membrane separation, magnetic sep...

Claims

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Application Information

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IPC IPC(8): C01B32/198C01B32/194B01J20/20
CPCB01J20/20C01B32/194C01B32/198
Inventor 郭明胡莹露丁帅洁郑轶璐孙立苹熊蔓文先红
Owner ZHEJIANG FORESTRY UNIVERSITY