| In our country, the phenomenon of industrial significant emissions of waste water and the pollution is serious. It endangers people’s living environment and physical health, so how to treat industrial waste water in a low-cost and efficient way has become an important research topic at present. Currently, there are many methods for treatment of waste water. Among them, titanium dioxide photocatalyst oxidation technology on behalf of and with DSA electrode material as the representative of electro-catalytic oxidation technology has been a research hot spot. Zeolite membrane, a kind of porous inorganic materials, is a kind of electrode material studied widely and it is suitable for carrier of photocatalyst. Therefore, in this work, this is the first attempt to apply to the photoelectrocatalytic oxidation technology, by using zeolite membrane as the photocatalysis carrier and electrocatalysis electrode materials.In this paper, NaY-type zeolite membrane was prepared by secondary growth on the porous stainless steel metal sheet with electro-chemical pre-seeding. Titania and N-doped are supported on NaY-type zeolite membrane by sol-gel method, by using the composite material as the anode electrode material; The structure and properties of the seed layer, zeolite membrane and the zeolite membrane after load of titania and N-doped are studied by XRD, FE-SEM, UV-visible-near infrared absorption spectrometer, etc; And its performance of photoelectrocatalytic oxidation of phenol waste water under simulated sunlight has also been studied by using the zeolite membrane compound materials after load of titania and N-doped as the anode electrode materials.Investigated:(1) The influence on the quality of the seed layer prepared by electrochemical adsorption with different aging time of the agent, voltage and energization time in the process of pre-seed by electro chemical adsorption,and the research of the the relationship between the quality of the seed layer and the zeolite membrane prepared by secondary growth. (2) The influence on the removal ration of phenol with different amount of tetrabutyl titanate and roasting temperature when loading of titania and N-doped, and different reaction time, initial concentration, initial pH, voltage and using times of the zeolite membrane electrode when degrading of phenol in the process of photoelectrocatalytic oxidation.The experimental results show that:(1) In the process of pre-seed by electrochemical adsorption, continuous seed layer can be made under the conditions of guide agent aging time of 2 d, voltage of 3 V and energization time of 15 s, and the diameter of the crystals is about 200 nm; Compact NaY-type zeolite membrane can be synthesized by secondary growth, and that is composed with zeolite particles which is twin growth and the particle size of 2 um. (2) By comparing the degradation of phenol under separate photocatalysis and electrocatalysis, and by using the zeolite membrane after load of titania and N-doped as the electrode materials, the combination oxidation process of combined the photocatalytic oxidation with electro catalytic oxidation is more conducive to improving the removal ration of phenol. The removal ration of phenol is highest by photoelectrocatalytic oxidation under the conditions of the amount of 6mL tetrabutyl titanate and 400℃ roasting temperature in the process of load of titania and N-doped, and 90 mg/L initial concentration,8 initial pH and 8 V voltage when degrading of phenol, and the removal ration of phenol reaches 89% after 180min of reaction and the removal ration of COD reaches 83%.The advantage of the photoelectrocatalytic oxidation technology, using zeolite membrane as the photocatalysis carrier and electrocatalysis electrode materials, is that simple preparation, low cost and high efficiency. |
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