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Graphene composite material and preparation method and application thereof

A composite material and graphene technology, applied in chemical instruments and methods, other chemical processes, water/sludge/sewage treatment, etc., can solve problems such as single function of composite materials, difficulty in filtering and sedimentation, and impact on water body ornamental, etc. Achieve the effects of large specific surface area, good repeated use effect and good mechanical properties

Inactive Publication Date: 2020-11-10
ANYANG NORMAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among them, dye pollution accounts for a large part. The wastewater polluted by dyes contains a large amount of toxic organic residues, inorganic substances, acids, alkalis, etc., and its discharge into water bodies will not only poison the environment, affect human health, but also cause serious damage to the environment. Serious impact on the ornamental quality of water bodies
[0003] As a new type of nano-adsorption material, graphene oxide itself has a large specific surface area and porous structure, stable chemical properties, good electrical conductivity and adsorption performance, and can achieve better results in the adsorption process of pollutants in wastewater, but The particle size of graphene is small, and it is not easy to filter and precipitate. Separation and recovery have become the key issues that limit the application of graphene. Even if there is a method of using magnetic materials to prepare graphene composite materials in the prior art, there are still problems that are not easy to degrade and the separation process is easy to occur. Agglomeration, and the preparation process is complicated, and the resulting composite material has a single function

Method used

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  • Graphene composite material and preparation method and application thereof
  • Graphene composite material and preparation method and application thereof
  • Graphene composite material and preparation method and application thereof

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preparation example Construction

[0035] The embodiment of the present invention discloses a preparation method of a graphene composite material, comprising the following steps:

[0036] (1) γ-Fe 2 o 3 The aqueous solution is mixed with at least one alkaline solution under constant temperature and stirring conditions to obtain the first mixed solution;

[0037] (2) chitosan is dissolved in acetic acid solution to obtain the second mixed solution;

[0038] (3) The first mixed solution and the second mixed solution are stirred and reacted under heating conditions, cooled to room temperature after the reaction is complete, the precipitated substances are washed with organic solvent and water successively, and dried to obtain chitosan-modified gamma-Fe 2 o 3 ;

[0039] (4) Graphene oxide is dissolved in water and ultrasonically dissolved to obtain a graphene oxide suspension, and chitosan-modified γ-Fe2O3 is ultrasonically mixed with the graphene oxide suspension, and the pH value is adjusted to neutral at the...

Embodiment 1

[0049] (1) 0.8g of γ-Fe with a molar concentration of 0.06-0.09mol / L 2 o 3 The aqueous solution and the sodium carbonate solution whose molar concentration is 0.3-0.5mol / L are mixed under normal temperature and constant temperature stirring conditions to obtain the first mixed solution;

[0050] (2) 1.3g chitosan is dissolved in acetic acid solution to obtain the second mixed solution;

[0051] (3) The first mixed solution and the second mixed solution are stirred and reacted in a water bath at 50-80°C, cooled to room temperature after the reaction is complete, washed with petroleum ether, ethanol and water in sequence, and dried to obtain a shell Glycan-modified γ-Fe 2 o 3 ;

[0052] (4) 2.373g graphene oxide is dissolved in water and ultrasonically dissolved to obtain a graphene oxide suspension, and the chitosan-modified γ-Fe 2 o 3 Ultrasonic mixing with graphene oxide suspension, while adjusting the pH value to neutral, using an external magnetic field to separate, w...

Embodiment 2

[0054] (1) 0.6g of γ-Fe with a molar concentration of 0.06-0.09mol / L 2 o 3 The aqueous solution and the sodium carbonate solution whose molar concentration is 0.3-0.5mol / L are mixed under normal temperature and constant temperature stirring conditions to obtain the first mixed solution;

[0055] (2) 1.4g chitosan is dissolved in acetic acid solution to obtain the second mixed solution;

[0056] (3) The first mixed solution and the second mixed solution are stirred and reacted in a water bath at 50-80°C, cooled to room temperature after the reaction is complete, washed with petroleum ether, acetone and water in sequence, and dried to obtain a shell Glycan-modified γ-Fe 2 o 3 ;

[0057] (4) 2.1g graphene oxide is dissolved in water and ultrasonically dissolved to obtain a graphene oxide suspension, and the chitosan-modified γ-Fe 2 o 3 Ultrasonic mixing with graphene oxide suspension, while adjusting the pH value to neutral, using an external magnetic field to separate, was...

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Abstract

The invention discloses a preparation method of a graphene composite material, and the method comprises the following steps: mixing an aqueous solution of gamma-Fe2O3 with at least one alkaline solution under a constant-temperature stirring condition to obtain a first mixed solution; dissolving chitosan in an acetic acid solution to obtain a second mixed solution; stirring and reacting the first mixed solution and the second mixed solution under a heating condition, performing cooling to room temperature after the reaction is completed, washing precipitated substances with an organic solvent and water in sequence, and performing drying to obtain chitosan-modified gamma-Fe2O3; and dissolving graphene oxide in water, carrying out ultrasonic dissolution to obtain a graphene oxide suspension,carrying out ultrasonic mixing treatment on chitosan-modified gamma-Fe2O3 and the graphene oxide suspension, adjusting the pH value to neutrality, and carrying out separation, washing and drying underthe condition of an external magnetic field to obtain the chitosan-modified gamma-Fe2O3 / graphene oxide composite material. The preparation method is simple, and the obtained composite material is good in adsorption performance and separability and low in cost and can be applied to the technical field of wastewater treatment.

Description

technical field [0001] The invention relates to the technical field of composite material synthesis, and more specifically relates to a graphene composite material used for wastewater adsorption, as well as a preparation method and application of the wastewater material. Background technique [0002] Water is the source of life. Our daily life, agricultural production and industrial synthesis are all inseparable from water. With the continuous development of industrial economy, the water environment problems are becoming more and more prominent. At present, water pollution is showing a serious situation , mixed with various pollutants. Among them, dye pollution accounts for a large part. The wastewater polluted by dyes contains a large amount of toxic organic residues, inorganic substances, acids, alkalis, etc., and its discharge into water bodies will not only poison the environment, affect human health, but also cause serious damage to the environment. The ornamental qual...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/30C02F1/28C02F101/30
CPCB01J20/20B01J20/06B01J20/24C02F1/281C02F1/283C02F1/286C02F2101/308B01J2220/4806B01J2220/4825B01J2220/46
Inventor 王薪孙凯浦卫压
Owner ANYANG NORMAL UNIV
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