Preparation And Photocatalytic Properties Of BiOCl Complexes

As a novel photocatalyst, Bi OCl shows high photocatalytic efficiency, low pollution property, and excellent energy conservation ability,which is espect to be applicatied in photocatalysis. However, the large particle size and small specific surface area of Bi OCl restrict its photocatalytic performance. Moreover, the Bi OCl powder is difficult to recovery, limiting its large-scale application.In this thesis, graphene and sepiolite were selected to improve the photocatalytic performance of Bi OCl. Bi(NO3)3, HCl and graphene were chosen as raw materials;ammonia was selected to be precipitating agent. After hydrolysis precipitation reaction, Bi OCl/graphene nanocomposites were successfully prepared as photocatalyst. The nanocomposites was characterized by XRD, Raman, TG-DTA,SEM, and rhodamine B was chosen as degradation product. The results show that:Graphite can greatly improve the performance about 35.7% ~ 41.7% of photocatalytic materials.Herein, we have successfully prepared sepiolite/flower-like Bi OCl nanocomposites as photocatalyst by hydrolysis precipitation method. After that, we investigated the influence of temperature, p H and Bi(NO3)3 concentration for the morphology of the nanocomposites. Furthermore, to explore the photocatalytic activity of these nanocomposites, rhodamine B was chosen as degradation product. The results show the flower-like Bi OCl is uniformly dispersed in sepiolite fibers and the photocatalytic efficiency of the nanocomposites exhibit 14.29 %~16.67 % higher than pure Bi OCl nanosheets; Circulation experiment shows that the catalyst has an excellent cycling stability.In this thesis, we have explored the recycling property of the superparamagnetic Bi OCl-Fe3O4 nanocomposites. We utilized Fe SO4、Fe Cl3、Bi(NO3)3、HCl as raw materials, ammonia as the precipitating agent to prepare the Bi OCl-Fe3O4 nanocomposites. We investigated the infulunece of addition order, p H and the type of agitator. The nanocomposites showed excellent cycling stability, it maintained a stable photocatalytic properties even after 30 times repeatation.