Preparation And Photocatalytic Properties Of Titania Nanorods And Graphene Complexes

With people living better and better,people pay more and more attention to environmental protection,people need an environment-friendly society.Nanometer titanium dioxide is the most commonly used photocatalyst in photocatalytic degradation technology,with the characteristics of environmental protection and low cost.According to the advantages and disadvantages of titanium dioxide,the titanium dioxide was modified,and then the composite of titanium dioxide and graphene was prepared by the composite,and the photocatalytic properties of the composite were studied.In this paper,we first prepared the linear nano titania,Then the microstructure was analyzed by means of micromorphology control and XRD FTIR and UV-Vis DRS analysis.Then,the photocatalytic degradation experiments were conducted to select the best photocatalytic degradation ability of the self-made titanium dioxide.In this paper,tetrabutyl titanate was used as the precursor,two groups of titanium dioxide preparation experiments were carried out successively.The first group of experiments changed the amount of solvent,and determined the effect of solvent ratio on titanium dioxide by multi-group experiments.Then,the second group of experiments was carried out.the total amount of alkyd remained unchanged and the ratio of alkyd to acid was constantly changed.The effects of alkyd ratio on the morphology of titanium dioxide nanorods were determined by multi-group experiments.Then the photocatalytic degradation of titanium dioxide nanorods was carried out with two groups of experimental samples.The results showed that the optimum photocatalytic efficiency of titanium dioxide nanorods was obtained when the total amount of alkyd was 1000 mmol/L and the ratio of acid to alcohol was 1:1.The composite of this sample with graphene was used to study its photocatalytic activity.Finally,the preparation of titanium dioxide nanorods and their complexes with graphene and their photocatalytic properties are analyzed.Firstly,water-soluble graphene oxide is obtained by solvothermal method,and the composite of graphene oxide and titanium dioxide?self-made optimum sample TiO₂-20:20:1?is carried out.A variety of titanium dioxide and graphene complexes are obtained by changing the ratio of graphene oxide and TiO₂-20:20:1.In the experiment of photocatalytic degradation of TiO₂-20:20:1/RGO-9:1,the best photocatalytic performance of TiO₂-20:20:1/RGO-9:1 is determined by explaining the data and determining the optimum ratio.Then the photocatalytic effects of TiO₂-20:20:1/RGO-9:1,TiO₂-20:20:1 and commercial P25 are compared.The results show that the photocatalytic effect of TiO₂-20:20:1/RGO-9:1 is much better than that of TiO₂-20:20:1.In comparison with P25,the adsorption performance of TiO₂-20:20:1/RGO-9:1 is better than that of commercial P25.To sum up,Graphene can make up for some deficiencies in the application of titanium dioxide in the field of photocatalysis,and the photocatalytic degradation activity of titanium dioxide can be significantly improved by the combination of graphene and titanium dioxide.The degradation effect is higher than that of P25,which is of great significance to the research of sewage treatment and air purification.