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Stainless steel base Sb-doped SnO_2 anode preparation and catalytic properties

Author: ZhangDianHong
Tutor: YuXiuJuan
School: Heilongjiang University
Course: Inorganic Chemistry
Keywords: Electrochemical Anode material Electrocatalysis Antimony - doped tin dioxide Phenol
CLC: X703
Type: Master's thesis
Year: 2009
Downloads: 25
Quote: 2
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Abstract


Biodegradable organic pollution in wastewater is always a hot research topic in the field of wastewater treatment, due to the complexity of its composition, biodegradability, and most of them have biological toxicity, using the traditional biological methods can only remove a small part. Looking for energy-efficient means of dealing with environmental protection has become an urgent and arduous task. Electrochemical method of treating wastewater has its unique advantages. Electro-catalytic oxidation technology in an environmentally friendly processing ability of pollutants, the devices are small and advantages of concern for people, and become a hot research closely related with the electro-catalytic properties of the anode material is the focus of attention. The titanium coating electrodes (DSA) is the most important metal oxide electrode, DSA electrodes are also provided for the preparation of the electro-catalytic electrode with a new idea, so that in itself does not have the function of structural support material (especially a large number of catalytic function of metal oxide) through the complex process in the electrode reaction. This thesis is stainless steel as the base material, the use of sol - gel process, prepared to select the optimum parameters of a stainless steel base Sn02 film. Sb-doped Sn02 was prepared in the stainless steel substrate film on the basis of the optimal process of the film preparation of the stainless steel base Sn02, by X-ray diffraction (XRD), scanning electron microscopy (SEM) and other research tools The in-depth study of various preparation conditions including temperature, doping concentration and coating times on film composition and microstructure of the stainless steel base Sb doped Sn02 film film formation mechanism. Using phenol as simulated pollutants removed by the phenol solution COD experimental characterization of the Sb-doped Sn02 anode electrochemical catalytic properties of the stainless steel substrate prepared from 100 mg / L, after three hours of electrolysis, phenol concentration was reduced to 3.8 mg / L, stainless steel substrate prepared Sb-doped Sn02 anode catalysis and good sewage treatment capacity. In order to study the different factors (temperature, pH, electrolyte concentration, electrolysis time, current) Degradation of COD removal performance, stainless steel base Sb doped Sn02 utilization of industrial pure titanium as an anode and as a cathode, Na2S04 as supporting electrolyte. phenol solution electrolysis experiments. Was found by experiment: With the increase of the concentration of initial phenol, phenol and COD removal efficiency greater reduced, but there is a substantial increase of removal; elevated temperature of the solution, to increase the electrolyte concentration in the solution to increase the electrolytic current , the conductivity of the solution can be increased to improve the degradation rate of the phenol and COD; values ??are conducive to the degradation of phenol, and the highest when the pH value of 5 and 7, at lower pH values, the increase in the initial pH of the solution to continue to grow The big solution pH, oxygen evolution reaction exacerbate, not conducive to the degradation of phenol.

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CLC: > Environmental science, safety science > Processing and comprehensive utilization of waste > General issues > Wastewater treatment and utilization
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