The Preparation Of Nano Cuprous Oxide And The Experiment Research Of Photocatalytic Degradation Of Phenol

The polluted sewage water containing phenol is the problem to be solved today either at home or aborad. And along with the development of the degradation techology toward this kind of water, the usage of sunlight along the degradation process with the help of cupprous oxide is becoming more and more popular.In this paper, the buffer solution of acetic acid and sodium acetate（HAc-NaAc） was used to adjust the valve of pH. In the buffer system of HAc-NaAc, pure cuprous oxide as well as Fe-doped cuprous oxide was prepared form sodium sulfite solution in common condition and hydrothermal synthesis using dextrose and hydrazine hydrate respectively. The sample was analyzed and characterized by using chemistry analysis, fluorescence spectroscopy analysis and XRD, which showed that the stability of self-made nano-Cu₂O photolysis reagent was considered to be very well specially when the room temperature was below 40 degree centigrade.With phenol as precursors and Cu₂O embedded by 1%Fe as a photocatalyst by the method of liquid reduction, and under the ultraviolet radiation, the initial concentration of heterocyclic species, treatment duration, calcine temperature of Cu₂O, Fe quantities embedded in Cu₂O, the amount of Cu₂O, initial pH value of the solution, the extra amount of hydrogen peroxide, are considered to effect on percent degradation on heterocyclic compounds. The experiment indicates that Cu₂O is the most photocatalytically active when 1%Fe is embedded; the temperature to calcine Cu₂O has a significant effect on catalytic activity; longer photocatalytic oxidation time corresponds to appreciable percent degradation on heterocyclic species, namely, 8h is demanded to reach 61.3% degradation and 50.5% TOC removal for phenol and. Large initial concentration of heterocyclic compounds is comparable to small degradable rate if the concentration lies between 10 and 50 mg/L, whose dynamic equation is the first-order; highest degradation on phenol occurs at addition of 0.5g/L catalyst. pH value 5 corresponds to highest percent degradation on heterocyclic compounds; the percent degradation increases when Fe-adopted cupprous oxide is added. But excessive hydrogen peroxide decreases 2% percent Fe is used in degradation.The degradation regulation is studied under airfloatation. The experiment reveals that the percent degradation on phenol increases with time duration increasing. The result brings out the photodegradation of phenol is 62.8% at the most then 4 outlets of air are used. The phenol is more susceptible to photodegradation by visiable light instead of ultraviolet light and so on. Addition of 0.5g /L Cu₂O results in highest TOC removal in the mixture whem degradation time as long as 3 hours, and then the optimal addition quantities are 1%Fe-Cu₂O using of incandescent lamp at 200W, which lead the photodegradation rate of phenol to 19.8%. Excessive catalyst corresponds to poor TOC removal. The same with pure cupprous oxide, the TOC removal-time of 1% Fe-Cu₂O relation follows the first-order dynamic equation, and the discipline of them are the same.Along with the development of the degradation techology toward polluted sewage water containing phenol, the usage of sunlight along the degradation process with the help of cupprous oxide turn out to be efficient in this experiment, which would help leading to the development of method becoming more and more popular.