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Graphene oxide type adsorption material and preparation method and application thereof

An adsorption material, graphene technology, applied in the field of material preparation and environmental science, can solve the problems of non-reusable, poor selectivity, high technical requirements and high cost of synthesis process

Active Publication Date: 2021-05-07
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional adsorption materials have low adsorption capacity and removal rate, poor selectivity, most of them cannot be reused, and cannot meet the actual production requirements for the removal of organic dyes and metal ions
Moreover, the synthetic raw materials of traditional adsorption materials are highly toxic, the synthetic methods are complicated, and the technical requirements and costs of the synthetic process are high.

Method used

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  • Graphene oxide type adsorption material and preparation method and application thereof
  • Graphene oxide type adsorption material and preparation method and application thereof
  • Graphene oxide type adsorption material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Mix 10g of 6% polyvinyl alcohol solution, 10g of 0.1% sodium humate solution and 6g of 0.5% graphene oxide aqueous dispersion solution at 50°C under stirring at a rotation speed of 100r / min to form a mixed solution A. Then, 10 g of 0.2% N,N'-methylenebisacrylamide solution was added to 10 g of 20% acrylic acid solution to form a mixed solution B, which was dropped into the mixed solution A at a rate of 3 drops / s. At the same time, 10 g of 0.4% ammonium persulfate solution was dropped into the mixed solution A at a rate of 2 drops / s. After the above solution was added dropwise and the mechanical stirring was continued for 20 min, the temperature was raised to 70° C., and the stirring was continued for 2 h to obtain a viscous gel material. The gel material was frozen at -4°C for 6 hours, then thawed at room temperature for 6 hours, freeze-thawed three times under the same conditions and operations, and then placed in a freeze dryer to freeze-dry to obtain a graphene oxide...

Embodiment 2

[0052] Mix 15g of 8% polyvinyl alcohol solution, 10g of 0.8% potassium humate solution and 8g of 0.8% graphene oxide aqueous dispersion solution at 55°C under stirring at a rotation speed of 120r / min to form a mixed solution A. Then add 10 g of 0.3% N,N'-methylenebisacrylamide solution into 10 g of acrylic acid solution with a neutralization degree of 40%, to form a mixed solution B, which is dropped into the mixed solution A at a rate of 4 drops / s. At the same time, 10 g of 0.7% potassium persulfate solution was dropped into the mixed solution A at a rate of 3 drops / s. After the dropwise addition of the above solution was completed, the mechanical stirring was continued for 30 minutes, and then the temperature was raised to 70° C., and the stirring was continued for 3 hours to obtain a viscous gel material. The gel material was frozen at -4°C for 8 hours, then thawed at room temperature for 8 hours, frozen and thawed four times under the same conditions and operations, and th...

Embodiment 3

[0054] Mix 20g of 6% polyvinyl alcohol solution, 10g of 1.5% potassium humate solution and 10g of 1% graphene oxide water dispersion solution at 60°C and stir at a speed of 140r / min to form a mixed solution A. Then add 10g of 0.5% N,N'-methylenebisacrylamide solution into 10g of acrylic acid solution with a neutralization degree of 60% to form a mixed solution B, which is dropped into the mixed solution A at a rate of 5 drops / s. At the same time, 10 g of 1.0% ammonium persulfate solution was dropped into the mixed solution A at a rate of 4 drops / s. After the above solution was added dropwise, the mechanical stirring continued for 40 minutes, and then the temperature was raised to 70° C., and the stirring was continued for 4 hours to obtain a viscous gel material. The gel material was frozen at -4°C for 10 hours, then thawed at room temperature for 10 hours, frozen and thawed 5 times under the same conditions and operations, and then placed in a freeze dryer to freeze-dry to ob...

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Abstract

,The invention discloses a graphene oxide type adsorption material and a preparation method and application thereof. Polyvinyl alcohol, humic acid and graphene oxide are cross-linked through acrylic acid to form a porous-structure hydrogel material under the polymerization effect of an aqueous solution, and under the condition that an initiator and a cross-linking agent are added, the graphene oxide type adsorption material is prepared without a nitrogen environment and the adsorption material can be obtained through rapid polymerization; active groups such as carboxyl groups and hydroxyl groups in structures of polyvinyl alcohol, humic acid and acrylic acid and hydroxyl groups in a structure of graphene oxide are in contact with organic dye or metal ions and then are combined by hydrogen bonds, electrostatic attraction and chelation, so that organic dye and metal ion pollutants can be efficiently removed; and the graphene oxide type adsorption material is of a porous structure, has a large specific surface area, can be recycled and is environmentally friendly, the synthesis process is simple, the requirement for reaction conditions is low, and operability is high.

Description

technical field [0001] The invention belongs to the technical fields of material preparation and environmental science, and in particular relates to a graphene oxide-type adsorption material and its preparation method and application. Background technique [0002] Graphene oxide is a single-layer structure carbon material obtained by oxidative exfoliation of graphene. Its oxygen-containing functional groups increase, making it more active and reactive than graphene, and it is easier to react with other raw materials. At the same time, its huge The specific surface area allows it to provide sufficient reaction sites, which also makes it easier to react with dyes and metal ions. Traditional adsorption materials have low adsorption capacity and removal rate, poor selectivity, and most of them cannot be reused, which cannot meet the actual production requirements for the removal of organic dyes and metal ions. Moreover, the synthetic raw materials of traditional adsorption mate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/30B01J20/34C02F1/28C02F101/20C02F101/30
CPCB01J20/267B01J20/24B01J20/20C02F1/288B01J20/3475C02F2101/20C02F2101/308
Inventor 韩玉英韩星星牛育华黄良仙宋洁王荣陈莉君李龙
Owner SHAANXI UNIV OF SCI & TECH
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