A graphene hybrid photocatalyst hydrogel

A photocatalyst and graphene technology, applied in the field of nanomaterials, can solve the problems of difficulty in meeting technical and economic requirements at the same time, inability to efficiently remove organic pollutants in water, low catalytic activity and low treatment efficiency, etc., and achieve in-situ catalytic degradation. Enhanced capability, improved removal and mineralization performance, and addressed effects that are difficult to remove efficiently

Active Publication Date: 2020-11-20
河北燕园众欣石墨烯科技有限公司
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Problems solved by technology

These pollutants are environmentally persistent, bioaccumulative, highly toxic and refractory, and pose a serious threat to human health and ecological security.
[0003] In the treatment of low-concentration and highly toxic organic pollution in water, there are still many key technical problems, it is difficult to meet the technical and economic requirements at the same time, and it has great limitations in practical application
Although the adsorption method (such as using only graphene adsorption materials) and the photocatalysis method have certain effects on the treatment of organic pollutants in water, there are some disadvantages and key problems that need to be solved when used alone, and they cannot efficiently remove organic pollutants in water.
[0004] The patent document CN107020073A discloses a preparation method of a graphene-based photocatalyst material, using lanthanum chloride, titanium source and graphene as raw materials, obtaining lanthanum titanate through precipitation and aeration reaction, and reacting with graphene with ultrasound and light The graphene-lanthanum titanate material is obtained, but there are problems such as cumbersome preparation steps, high production cost, easy agglomeration of graphene, low catalytic activity and processing efficiency

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  • A graphene hybrid photocatalyst hydrogel
  • A graphene hybrid photocatalyst hydrogel
  • A graphene hybrid photocatalyst hydrogel

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preparation example Construction

[0029] Its preparation method comprises the following steps:

[0030] A. Mix graphite oxide with deionized water and disperse it by ultrasonic wave for 80-150 minutes to prepare a graphene oxide aqueous solution with a concentration of 1.0-2.0mg / ml, and then perform mechanical peeling. The centrifugation condition for mechanical peeling is 2000-4000rpm. Unexfoliated graphene oxide was then removed by centrifugation.

[0031] Described graphite oxide adopts Hummers ' method to prepare, and concrete preparation method is: utilize 3.0g graphite powder to put in the three-neck round-bottomed flask, place round-bottomed flask in ice bath and fix, add 70mL vitriol oil and stir 10min, Mix graphite powder and concentrated sulfuric acid evenly. Then add 1.5g of sodium nitrate. After the sodium nitrate is dissolved, slowly add potassium permanganate three times the amount of graphite powder into the above mixed solution, and continue stirring for 2.5 hours. During the stirring process,...

Embodiment 1～4

[0037] Embodiments 1-4 are the same as the above-mentioned preparation reaction steps, but the different reaction conditions are shown in the table below. Among them, "ultrasound A" represents the time of ultrasonic dispersion in step A, "concentration" represents the concentration of the graphene oxide aqueous solution, "centrifugation" represents the centrifugal condition during mechanical peeling, and "mass ratio X" represents the concentration of graphene oxide and graphene oxide in step B. The mass ratio of the photocatalyst, "ultrasonic B" indicates the time of ultrasonic dispersion in step B, "mass ratio W" indicates the mass ratio of photocatalyst to reducing agent in step C, and "mass ratio Y" indicates the graphene hybridization in step D The quality of the photocatalyst and the graphene oxide aqueous solution, "ultrasonic D" indicates the time of ultrasonic dispersion in step D, and "mass ratio Z" indicates the mass ratio of the graphene hybrid photocatalyst to the a...

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Abstract

The invention discloses a graphene hybridized photocatalyst hydrogel, belonging to the field of nanometer materials. The graphene hybridized photocatalyst hydrogel is used for treatment of water pollution and prepared by using graphite oxide and a photocatalyst as raw materials through a reduction reaction and ultrasonic treatment. The graphene hybridized photocatalyst hydrogel provided by the invention can promote the dispersion of graphene oxide in water, avoids further aggregation of a nanoscale photocatalyst from generation in the process of hydrogel formation, can significantly improve the specific surface area and adsorption capacity, has more obvious three-dimensional cross-linked mesoporous microstructure, can realize the synergistic effect of adsorption enrichment and photocatalytic degradation, significantly reinforces the in-situ catalytic degradation ability of adsorbed and enriched pollutants, and can greatly improve the mineralization and removal efficiency of pollutants.

Description

technical field [0001] The invention relates to graphene, in particular to a graphene hybrid photocatalyst hydrogel, which belongs to the field of nanometer materials and is used for controlling water pollution. Background technique [0002] Water pollution is an important aspect of environmental pollution, which seriously restricts the improvement of the quality of life. There are many kinds of pollutants in water, not only the pollution of heavy metal ions, but also the pollution of low-concentration toxic and harmful refractory organic substances, such as phenol, 4-chlorophenol, polychlorinated biphenyls, polybrominated diphenyl ethers, perfluorooctanoic acid (sulfonic acid), bisphenol A and so on. These pollutants are environmentally persistent, bioaccumulative, highly toxic and refractory, and pose a serious threat to human health and ecological security. [0003] There are still many key technical problems in the treatment of low-concentration and highly toxic organi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J21/06B01J23/06B01J23/28B01J23/30B01J27/04B01J27/186B01J37/16B01J37/34C02F1/30
CPCB01J21/063B01J23/06B01J23/28B01J23/30B01J27/04B01J27/186B01J35/0006B01J35/0013B01J35/004B01J37/16B01J37/343C02F1/30C02F2305/10
Inventor 郭耸
Owner 河北燕园众欣石墨烯科技有限公司
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