Study On The Preparation Of Egg Protein And Graphene Oxide Composite Material And Its Adsorption Performance For Methylene Blue

In recent years,contradictions emerge in the endless stream of industrial development,and purified water resources have become the focus of attention.Finding the best way of purifying water resources has become a key point of sustainable development.Photocatalytic degradation,adsorption,membrane separation,biological treatment,chemical solidification and other methods have their own unique advantages,and have been gradually applied to social practice.Because of the advantages of low cost,short time consumption and high productivity,the adsorption method opens up a new field in the field of purifying water resources.Nanostructured materials have been applied to various fields gradually due to improving physical and chemical properties of traditional materials.Graphene,as one of the members,also has excellent performance.Graphene oxide is an extension of the development of graphene.It has more oxygen functional groups on the basis of its main properties,and has a wider use of space.Natural polymer materials are renewable resources,because of their good biocompatibility,non-toxic side effects and other characteristics,they been applied in many fields,and achieved remarkable results.In this paper,egg protein aerogels and graphene oxide / egg protein(PGO)aerogels were prepared,and the mechanism and properties of each adsorbed methylene blue were investigated in detail.Egg protein aerogels were prepared by heating and freeze-drying process.In order to understand its surface structure and chemical composition,we detected it by related instruments.We strictly controlled the experimental conditions and explored the specific situation of adsorption of methylene blue in egg protein aerogels under various circumstances.Using adsorption kinetics to simulate the process of adsorption experiments,we find that Pseudo-second-order equation is the most suitable for adsorption process.For the adsorption of methylene blue isotherm,the aerogel adsorption methylene blue process follows the Langmuir equation,and the maximum adsorption methylene blue capacity is up to 71.43mg/g.Thermodynamic properties were studied by adsorption thermodynamics.Specific data showed that aerogel adsorption methylene blue was easier to carry out at lower temperatures.Graphene oxide(GO)was developed by improved Hummers method,and its internal structure and group were detected by instrument.The egg protein / graphene oxide(PGO)aerogels were prepared by blending freeze-drying.And the surface morphology,molecular structure and thermal stability were analyzed by different characterization tests.The interference of PGO aerogels on methylene blue under different external conditions was tested.The whole process of the experiment is simulated by adsorption kinetics.The results showed that the Pseudo-second-order equation is most suitable for the experimental process.Adsorption methylene blue isotherm shows that methylene blue attached aerogel process follows the Langmuir equation,and the ultimate adsorption capacity ups to 91.66mg/g.Adsorption thermodynamics studies showed that PGO aerogels adsorbed methylene blue spontaneously and exothermal process.