A Study On Preparation And Application Of Graphene Nanocomposites Based On Graphene

In this paper,graphene-based composites such as Fe₃O₄/graphene,ZnO/graphene,Cu₂O/graphene were prepared,and their adsorption properties,electrocatalytic properties and photocatalytic properties were studied.They were applied to the deed treatment of oil field water samples,enriched the oil field water treatment methods and the methods of dealing with environmental problems.The oxided graphite is prepared by the Hummer method,and the oxided graphene was modified by ammoniation.The AGO/Fe₃O₄ was prepared by the methed of chemical coprecipitation.The composite was characterized by SEM,XRD,Raman spectroscopy,FT-IR and TEM.The AGO/Fe₃O₄ can achieve efficient adsorption of oil droplets,and has good performance of recycling.The AGO/Fe₃O₄/GEC composite electrode was modified by the AGO/Fe₃O₄.It was found that the sensor could produce a good electrochemical response to the phenol.The effects of different pH and scan rate were subjected on the electrochemical response of phenol.After optimizing the conditions,the phenol concentration was found to be in the range of 0.45?M to 56?M and the range of 156?M to 456?M was proportional to the oxidation peak current,and the linear correlation were 0.9984 and 0.9950,respectively.It was found that the detection limit can reach 0.4?M,and can be used for oil field sewage phenol content analysis.The GO/Fe₃O₄/ZnO composite was prepared by simple hydrothermal method.The composite was characterized by SEM,FT-IR,XRD,fluorescence spectrophotometer and TG-DSC.The results have shown that the composite is successfully loaded on GO with good thermal stability and photocatalytic performance.The GO/Fe₃O₄/ZnO and H₂O₂ Fenton system can be used to degrade phenol under the irradiation of visible light.The degradation rate is above 98%.The Cu₂O/GO@NF loaded photocatalyst was prepared by the combination of the methed of dipping and electrochemical deposition.The composite was characterized by SEM,XRD and fluorescence spectra.It was found that the Cu₂O was loaded on the surface of GO@NF with good photocatalytic performance.The photocatalytic behavior of Cu₂O/GO@NF on HPAM was studied under visible light.