A kind of preparation method of fly ash/graphene oxide composite adsorption material

A graphene composite and adsorption material technology, applied in chemical instruments and methods, other chemical processes, etc., can solve problems such as difficulty in separation, and achieve the effect of simple preparation method

Active Publication Date: 2016-10-26
安徽工大化工科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the disadvantage of difficult separation of graphene oxide as an adsorption material, and at the same time use fly ash, a solid waste discharged from a coal-fired power plant, to compound fly ash and graphene oxide to solve the problem of graphite oxide The separation of graphene oxide can not only achieve waste utilization, but also make full use of the unburned carbon in fly ash, which is conducive to improving the adsorption capacity of graphene oxide

Method used

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  • A kind of preparation method of fly ash/graphene oxide composite adsorption material
  • A kind of preparation method of fly ash/graphene oxide composite adsorption material

Examples

Experimental program
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Effect test

Embodiment 1

[0018] When preparing, take 1g of fly ash, add 1mL of chitosan solution with a mass concentration of 5% and soak for 2h, then filter and dry at 50°C for 3h, then add it to 10mL of 5g / L graphene oxide solution and soak for 12h, while stirring for 2h , dilute with water until the solid phase concentration reaches 40g / L, add 2mL glutaraldehyde for cross-linking for 3h, the cross-linking temperature is 80°C, filter off the liquid phase and wash with absolute ethanol until neutral, then vacuum dry at 60°C for 6h to obtain a compound Adsorbent material.

Embodiment 2

[0020] When preparing, take 1g of fly ash, add 1mL of chitosan solution with a mass concentration of 1% for immersion for 3h, then filter and dry at 80°C for 2h, then add 15mL of 5g / L graphene oxide solution for immersion for 10h, stir for 3h at the same time, add water When diluting to a solid phase concentration of 40g / L, add 1mL glutaraldehyde for cross-linking for 3h, the cross-linking temperature is 80°C, filter off the liquid phase and wash with absolute ethanol until neutral, then vacuum dry at 60°C for 5h to obtain a composite adsorption material .

Embodiment 3

[0022] When preparing, take 1g of fly ash, add 1mL of chitosan solution with a mass concentration of 2.5% and soak for 3h, then filter and dry at 80°C for 2h, then add 20mL of 2g / L graphene oxide solution for soaking for 8h, stir for 3h at the same time, add water When diluting to a solid phase concentration of 40g / L, add 0.5mL glutaraldehyde for crosslinking for 2h, the crosslinking temperature is 80°C, filter off the liquid phase and wash with absolute ethanol until neutral, then vacuum dry at 60°C for 6h to obtain the composite adsorption Material.

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Abstract

The invention discloses a preparation method of a pulverized fuel ash / oxidized grapheme composite adsorbing material, and belongs to the technical field of environmental protection materials. The preparation method comprises the following special steps: adding a chitosan solution with the mass concentration being 1-5% in pulverized fuel ash according to the ratio of 1 g of pulverized fuel ash to 1 ml of chitosan solution for impregnating for 2-3 h, then drying for 2-3 h at 50-80 DEG C, next adding an oxidized grapheme solution according to the ratio of 1 g of pulverized fuel ash to 10-20 ml of oxidized grapheme with the concentration being 2-5 g / L for impregnating for 8-12 h, stirring for 2-3 h at the same time, adding glutaraldehyde according to the ratio of 1 g of pulverized fuel ash to 0.5-2 ml of glutaraldehyde for crosslinking for 3 h at 50-80 DEG C in the process of adding water to dilute till the solid concentration is 40 g / L, filtering out a liquid phase and washing with absolute ethyl alcohol to be neutral, and performing vacuum drying for 5-6 h at 60 DEG C to obtain the pulverized fuel ash / oxidized grapheme composite adsorbing material. The pulverized fuel ash / oxidized grapheme composite adsorbing material, prepared through the preparation method, overcomes the defect that oxidized grapheme is difficult to separate, and can adsorb anionic-cationic dyes and various pollutants synchronously.

Description

technical field [0001] The invention belongs to the technical field of environmental protection materials, and in particular relates to a preparation method of a fly ash / graphene oxide composite adsorption material. Background technique [0002] Adsorption, as a recognized, effective and economical method of sewage purification, has received widespread attention in recent years. Fly ash is mainly derived from the fine particle residue after pulverized coal combustion in coal-fired power plants. At present, it is mainly used to prepare cement concrete. The use of fly ash to prepare adsorption materials is an important aspect of developing high value-added products using fly ash at home and abroad in recent years. one of the ways. The patent application No. 201210410765.3 "Preparation method of a fly ash-based high-performance adsorption material" proposes to use the aluminate in the fly ash to prepare zeolite and then use it for adsorption, and the patent application No. 200...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/24B01J20/30
Inventor 盛广宏朱双王诗生王文祥
Owner 安徽工大化工科技有限公司
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