Preparation method of graphene hydrogel and application of the graphene hydrogel

Abstract

The invention discloses a preparation method of graphene hydrogel, which includes following steps: adding a reducing agent to a graphene oxide solution for ultrasonic dispersion; heating the reaction system to carry out a reaction; and washing a reaction product after the reaction finished to obtain the graphene hydrogel. In the invention, a macroscopic form material, graphene hydrogel, in a three-dimensional network structure is assembled and formed with the graphene as a framework, so that problems of nano agglomeration and layer stacking among the layers of the graphene, thereby greatly increasing the specific surface area of the material and enhancing the adsorption effect of the material. The preparation method is easy to perform, is carried out with common reducing agents and under relative mild conditions to prepare the graphene hydrogel in a reduction manner, is decreased in preparation cost, is free of environmental pollution, is free of obviously dangerous raw materials and is suitable for large-scale commercialized production.

Description

technical field [0001] The invention belongs to the technical field of chemical synthesis, and relates to a method for preparing graphene hydrogel with high adsorption capacity for antibiotics by chemical reduction under mild conditions. Background technique [0002] Graphene (GO), as a popular emerging material, has excellent electrical and thermal conductivity, super mechanical properties, high stability and large specific surface area, and has attracted widespread attention worldwide. In recent years, with the continuous advancement of science and technology, the process of mass production of graphene has become more mature and its cost has become lower. The high specific surface area and mature production technology make graphene a potentially efficient adsorbent. Because graphene prepared by conventional methods is in the form of ultrafine powder, problems such as agglomeration and uneven distribution may occur during use due to size effects, surface inertia, etc., resu...

AI Technical Summary

Problems solved by technology

Because the graphene prepared by conventional methods is in the form of ultrafine powder, problems such as agglomeration and uneven distribution will occur during use due to size effects, surface inertia, etc., resulting in the excellent performance of the material itself not being effectively utilized.

At the same time, due to the large van der Waals force between graphene sheets, serious nano-agglomeration and sheet stacking occur between layers, which greatly reduces the specific surface area of ​​graphene and greatly limits its application.

In the water treatment process, since graphene is a water-dispersed solution, ultrafiltration or centrifugation is required after adsorption, and the subsequent treatment process is complicated.

In addition, graphene as a nanomaterial has certain biological toxicity, and its secondary pollutants in the environment have also attracted considerable attention.

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