Porous graphene polymer and preparation method thereof

Abstract

A porous graphene polymer and its preparation method are disclosed. According to the preparation method, a graphene precursor is prepared by using anhydrous ethanol and auxiliaries, and inert gas is introduced into a reaction kettle and microwave pyrolysis is conducted to obtain graphene; by ultrasonic mixing of a sulfuric acid and nitric acid mixed solution and graphene, graphene oxide is prepared; and a polyferric chloride solution and a sodium borohydride aqueous solution are prepared, and the polyferric chloride solution and the sodium borohydride aqueous solution react with a graphene oxide solution which has undergone ultrasonic dispersion so as to obtain polyferric chloride cross-linked porous graphene polymer. The porous graphene polymer has large specific surface area, large contact area with a water body and strong adsorption capacity, and is easy to form flocculent precipitate with pollutants such as organic matter in water and the like. The product has stronger COD removal ability and can adsorb heavy metal, oil stain and organic matter to form flocculent precipitate. And pollutants are finally collected and removed through underwater extraction or air flotation.

Description

technical field [0001] The invention relates to a technology in the field of chemistry and chemical engineering, in particular to a porous graphene polymer and a preparation method thereof. Background technique [0002] Graphene is a hexagonal single-layer sheet structure material composed of carbon atoms with sp2 hybrid orbitals in a honeycomb lattice configuration. The thickness of each layer is only equivalent to the diameter of one carbon atom, but its hardness is the most known to human beings. highest among. The chemical properties of graphene are similar to the surface of graphite, which has extremely high chemical stability and strong ability to adsorb various atoms and molecules. Utilizing the characteristics of graphene, sewage treatment materials with better performance can be prepared through a series of physical and chemical treatment methods. Contents of the invention [0003] The present invention aims at the problems that the existing sewage treatment mat...

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Problems solved by technology

[0003] The present invention aims at the problems that the existing sewage treatment materials use a large amount of materials when treating sewage, the treatment of sewage requires the cooperation of ultraviolet lamps to effectively absorb pollutants, the treatment and recovery relies on magnetic fields, and it is difficult to realize the recovery of open river sewage, etc. A porous graphene polymer and its preparation method are proposed. The graphene precursor is prepared by absolute ethanol and additives, and graphene is obtained by radiation pyrolysis; the acid mixed solution is ultrasonically mixed with graphene to obtain graphene oxide. The reducing agent cross-links the polyferric chloride macromolecular chains on the graphene oxide to obtain graphene polyferric chloride composite hydrogel, and further obtains fine particle porous graphene polymer by freeze-drying and crushing. Strong adsorption and decontamination ability, convenient collection, and improved operational efficiency of sewage treatment

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