A graphene hybrid photocatalyst hydrogel

Abstract

The invention discloses a graphene hybrid photocatalyst hydrogel, which belongs to the field of nanomaterials and is used to control water pollution. It includes a product obtained by using graphite oxide and photocatalyst as raw materials through reduction reaction and ultrasonic treatment; the invention can promote The dispersion of graphene oxide in water prevents further aggregation of nanophotocatalysts during the formation of hydrogels, can significantly increase the specific surface area and adsorption capacity, and has a more obvious three-dimensional cross-linked mesoporous microstructure, which can achieve rich adsorption. The synergistic effect of concentration and photocatalytic degradation significantly enhances the in-situ catalytic degradation ability of adsorbed and enriched pollutants, which 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...

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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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