| TiO2 is of high performance and high function with its prominent properties in semi-conductor, optics and the photochemistry. It is applied to various fields as an important material. Nanometer SnO2 is the typical N-type semiconductor, having the characteristics of large surface, high activeness, low melting point, good thermal conductivity, etc. So it has been used in numerous aspects such as dish material, electricity aspect, photoelectricity monitor, clarity electrode, solar battery, liquid crystal display, catalysis.Sol-gel process was used to prepare the thin film electrodes. The raw materials and the preparation procedure were the primary factors that affected the electrode structure and their electrochemistry performances.The experiment, linking the electrode to the electrochemistry workstation, adopting time coulometry measure, taking potassium acid phthalate as the goal organic matter, had determined technological conditions of sol proportion, bake temperature, calcine time, coating thickness and coating layer, as well as test result indicate the oxidized electric current variation along with the material density, which might determined the organic contamination density in the water.The experiment used SEM and XRD to analyze superficial appearance, elemental composition and structure of preparation electrode. Applying CV and EIS to test the electrode, which resulted Ti/TiO2,Ti/SnO2 thin film electrode CV behavior and surface impedance and the capacitance in sulfuric acid solution.This experiment used the simple method comparatively, no secondary pollution in the preparation process, low energy consumption, easy operation, and certain feasibility in application. This It would be good prospects of using this method to examine organic substance density in environmental monitoring field. |
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