Preparation method and application of graphene and hydroxyapatite composite material

Abstract

The invention discloses a preparation method of a graphene and hydroxyapatite composite material, which comprises the following steps of: (1) dispersing graphene oxide in deionized water, and carryingout ultrasonic treatment to obtain a GO dispersion liquid; (2) dissolving calcium chloride dihydrate in deionized water to obtain a calcium chloride solution, and dissolving diamine hydrogen phosphate in deionized water to obtain a diamine hydrogen phosphate solution; (3) uniformly mixing the calcium chloride solution with the GO dispersion liquid, and adjusting the pH value of the mixed solutionof calcium chloride and GO; and (4) adding the diamine hydrogen phosphate solution into the mixed solution of calcium chloride and GO, adjusting the pH value of the mixed solution of diamine hydrogenphosphate, calcium chloride and GO, transferring the mixed solution into a hydrothermal reaction kettle for reaction, and then performing centrifugation, washing and vacuum drying to obtain the graphene and hydroxyapatite composite material. The composite material has high specific surface area, a rich micropore structure and various oxygen-containing groups on the surface, uranium in uranium-containing wastewater can be effectively removed, the preparation method is simple, and the composite material is suitable for large-scale engineering application.

Description

technical field [0001] The invention belongs to the technical field of adsorption materials, in particular to a preparation method and application of a graphene and hydroxyapatite composite material. Background technique [0002] As a common nuclear raw material, uranium (VI) will inevitably cause environmental radioactive pollution in fuel reprocessing, uranium mining and nuclear accidents. Uranium is radioactive, toxic and highly mobile. Moreover, uranium has a long half-life, posing a constant threat to water cleanliness, human health and ecosystems. Therefore, the removal of uranium from aqueous solutions is urgent and necessary. Adsorption technology is a cost-effective remediation technique, and currently there are a variety of adsorbents that play a vital role in the treatment of radionuclides, such as zeolites, activated carbon, and minerals. However, most natural adsorbents do not possess high adsorption capacity under acidic conditions and thus are not suitable ...

AI Technical Summary

Problems solved by technology

However, in practice, the application of common HAPs is usually limited by the small particle size that is not easy to collect products. HAPs need to enhance complexation with other substances that are easy to precipitate and provide more interaction sites for the reaction, which is important for scaling up Its application potential in uranium fixation is crucial

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