Research progress on the preparation and mechanism of magnetic graphene functional materials in Xinjiang Institute of Physics and Chemistry

Preparation of Magnetic Reduction Graphene Oxide and Its Adsorption to Bisphenol A

Graphene materials have unique physical and chemical properties and have broad application prospects in the fields of energy, catalysis and environment. In recent years, graphene-based materials have received extensive attention in the removal of phenolic organic pollutants. Usually the oxygen-containing functional groups on the surface of the graphene-based material can form hydrogen bonding with phenolic contaminants. However, the presence of oxygen-containing functional groups on the surface of the graphene-based material also destroys the graphitized structure and weakens it from the phenolic contaminants. The π-π force, therefore, the amount of oxygen-containing functional groups on the surface of the graphene-based material may have a significant effect on the adsorption of phenolic contaminants. However, it is still rare to report the effect of the adsorption mechanism of reduced graphene oxide on phenolic contaminants and the reduction process of graphene oxide on the adsorption of phenolic contaminants. In addition, due to the smaller size of the graphene-based material and its excellent dispersibility in water, it is difficult to recycle the graphene material itself after use.

Recently, Zhang Yagang, a researcher at the Resource Chemistry Research Department of the Xinjiang Institute of Physics and Chemistry, Chinese Academy of Sciences, led his team to investigate the reduction process of graphene oxide and magnetically functionalize it to prepare magnetically reduced graphene oxide materials with different reduction degrees. The effect of graphene oxide reduction on the adsorption kinetics and adsorption capacity of bisphenol A. Studies have shown that the deep reduction of graphene oxide reduces its adsorption capacity for bisphenol A; however, after the magnetic isotope of magnetic reduction graphene is normalized with its specific surface area, the deep reduction of graphene oxide can increase the unit. The amount of adsorption on the area.

Based on the experimental results, researchers proposed its mechanism of action: During the adsorption of bisphenol A on graphene materials, the π-π interaction plays a major role; after the deep reduction of graphene oxide, the adsorption capacity of bisphenol A decreases. This is due to the fact that the polymerization of graphene sheets reduces the adsorption sites. In addition, the experimental results also show that the reduced graphene oxide after magnetic functionalization can be quickly recovered through an external magnetic field, and repeatedly used after regeneration, laying the foundation for large-scale industrial application.

Related research results were published on the RSC Advances.

The research work was supported by the National Natural Science Foundation of China and the “Thousand People Project-Xinjiang Project”.

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