Preparation Of One Dimensional Fluorine Doped ZnO Porous Array Film And Its Application In Phototransformation

With the development of science and technology, exploiting of new energy resources and protection of the environment have become the core of the sustainable development strategy. The use of solar photovoltaic power generation is an irreversible trend in the energy field. Dye-sensitized solar cells(DSSC) which is known as the third generation of new solar cells has extensive application prospect. Meanwhile various kinds of photocatalytic technology is widely used in the field of environmental protection in order to solve the more and more serious environment pollution.Research shows that semiconductor oxide has broad application prospect in solar cells and photocatalytic technology. Zinc oxide can be synthetized through different growth mechanism to have special properties and nanostructures due to its properties of easy to crystallization and anisotropic grain growth. Compared to other semiconductor oxide, the modified work on the surface of ZnO is much easier. Therefore, ZnO with different morphologies can be obtained by researchers based on their need, then be modified and applicated in different fields. In this paper valuable explorations have been carried out on the synthesis and applications of F-ZnO films with high surface area. The main points could be summarized as follows:Hiercrchical structure and porous F-ZnO prism array film with high surface area has been successfully synthetized by mimicing surface structures of plant leaves. When it was used as DSSC photoanode, high DSSC photoelectric conversion efficiency was acquired. The film was prepared by a simple and low temperature chemical bath deposition method and the follow-up heat treatment. SEM, TEM and HRTEM were used to investigate the morphology and structure of the samples. The results show that the porous prism has a large inner surface and a approximate single crystalline structure. The porous prism film with a length of1.6μm was applicated in DSSC and a conversion effciency of2.93%was obtained which was higher than the corresponding nanorod film. The desorption test and electrochemical impedance analysis provide further evidence that the film has high surface area and small transmission resistance which make it fit for DSSC photoanode. In addition, the influence of the lenth on the photoelectric conversion efficiency was investigated. A series of mesoporous Ag modified and F doped hierarchical ZnO prime arrays with different Ag contents were prepared by photosynthesis approach and their appplication in photocatalysis were investigated. The photocatalytic performance for the degradation of rhodamine B (RhB) was evaluated. The results show that such hierarchical Ag/F-ZnO mesoporous sprism arrays exhibit significantly enhanced photocatalytic efficiency. When the Ag content is lower than3mol%, the photocatalytic activity of the Ag/F-ZnO increases with the increase of Ag content. Alternatively, when the Ag content is higher than3mol%, the photocatalytic activity of the Ag/F-ZnO decreases with the increase of Ag content. The reason is that optimized amount of Ag content acted as electron sinks to enhance the separation of photoinduced electrons from holes and thus enhance the photocatalytic efficiency. Furthermore, the durability of the photocatalytic activity of Ag/F-ZnO with Ag content of3mol%was studied by reuse of the catalysts under UV light irradiation. The result shows the films can be easily reused compared with powers and also the Ag/F-ZnO samples have high durability.