Secondary Physics TiO₂ Nano-film Innovative Experimental Design

This thesis is based on the theoretical knowledge of middle school physics innovation experiments,combined with the basic requirements for quality education put forward by the new curriculum reform,combines middle school physics innovation experiments with the frontier content of physical sciences,and designs a series of middle school physics innovations on nanomaterials.Experimental examples explored experimental design of middle school physics innovation.The design of the experimental program was student-centered.The sol-gel method was chosen.This method is safe,simple and easy to learn.It is also a commonly used experimental method for modern physical science research.In the design of middle school physics innovation experiments,the selected characterization methods including XRD,UV-Vis,and electrochemical workstations are relatively easy to operate and have more intuitive understanding of the experimental results,allowing students to develop their horizons and stimulate their curiosity.And experimental interest.The preparation of TiO₂ nanofilms and their optoelectronic properties were taken as examples to design a middle school physics innovation experiment.Using the sol-gel method,factors such as the number of layers in the TiO₂ nanofilm preparation process,the pulling speed,and the annealing temperature were used as research variables.The characterization and analysis of the experimental results gave the best preparation process.Students are allowed to have a deeper understanding of innovative physics experiments in the process of experimentation.While learning experimental methods,they can also create experimental thinking,learn to process experimental data,and explain experimental phenomena by searching for literature.Because of the difference in students' knowledge level and understanding ability,based on the innovative experiment of TiO₂ nanometer thin film,further designing and expanding innovative experiments,the optical and electrical performance experiments of Ag-doped TiO₂ nanometer thin film were designed,and the photoelectric properties of nano Ag-modified TiO₂ nano thin film were designed respectively.Experiments,both methods have made the photoelectric properties of the material significantly improved.The operation process of Ag-doped TiO₂ nano-films is relatively simple.Therefore,in the experimental design,the processing and analysis of the experimental data are emphasized,and the optimum doping concentration and annealing temperature are obtained.The nano-Ag-modified TiO₂ nano-films have relatively complex experimental procedures.The introduction of nano-Ag sols is an extension of the TiO₂ sol preparation process.The spin coating method has been selected as the best coating method,and the best spin has been selected.Paint speed.The difficulty and focus of the two experimental programs are different.You can choose appropriate expansion experiments based on the actual situation of the students.This research has been applied to the experimental design of middle school physics innovation.It plays an important role in improving the students' experimental ability and understanding the frontier knowledge of physics.