Preparation And Properties Of Graphene And Similar To The Graphene Composites

With the development of society,the current state of environmental pollution and depletion of energy have been threatened the development of human beings,which requires people to solve this problem through environmental governance and the development of new energy sources.Nowadays,the types and emissions of organic wastewater discharged from industrial production are increasing,forming the problem of environmental pollution that threatens human health and the living environment of other organisms.Therefore,the search for an effective method to solve the problem of environmental pollution has attracted widespread attention.Based on the research status of photocatalytic technology,we deal with this pollution problem through photocatalytic degradation technology.Similar to TiO2,Barium titanate is a wide bandgap semiconductor material.It can effectively degrade a variety of organic pollutants such as methyl orange,methylene blue,and rhodamine,indicating that it has application significance in the field of photocatalysis.In addition,BaTiO3 also has dielectric,piezoelectric,and ferroelectric properties,and its interior has a spontaneous dipole field that can effectively separate photogenerated electrons and holes.However,the wavelength range of its excitation light is limited by its wide band gap,which greatly reduces the photocatalytic effect.Graphene is increasingly used in the field of photocatalysis due to its excellent properties.Graphene has a special two-dimensional layered structure with a large specific surface area,which can be used as a carrier or a template for carrying the catalyst or complexing with other substances to increase the photocatalytic activity.In addition,graphene has good conductivity to enhance the electron transfer ability.Therefore,the graphene-based composite material can be deeply applied to the field of photocatalysis.Molybdenum disulfide,which has a similar layered structure to graphene,has attracted much attention in many fields.Transition metal sulphides have a clear advantage over oxides in terms of electron conduction,while the theoretical specific capacitance of molybdenum disulfide is higher than that of graphene.However,pure molybdenum disulfide cannot meet the high performance requirements of today's applications,and other means are needed to improve its performance.In this paper,a simple hydrothermal treatment combining iron oxide with it is proposed to improve its electrochemical performance.The third chapter gives a detailed preparation process of barium titanate nanowires and graphene composites.Graphene can improve the conductivity of the sample.At the same time,under the action of the spontaneous polarization field inside BaTiO3,the photo-excited carriers can move faster,which effectively prevents the recombination of electrons and holes.In addition,the large specific surface area of graphene can achieve large-area adsorption of target molecules,which can significantly improve its photocatalytic activity.The fourth chapter of this article mainly describe the preparation of cubic ferric oxide.On this basis,the composite product with molybdenum disulfide was further obtained through the hydrothermal treatment method,and the Fe3O4/MoS2 composite was obtained by annealing.Characterization confirms that the composite has a higher specific capacity than pure Fe3o4 or MoS2,making it a promising candidate for supercapacitors.