Study On Preparation And Photocatalytic Perfrmance Of Titanium Dioxide Powder Of Doped With Copper And Nonmetal

In order to improve the photocatalytic degradation performance of TiO₂, titanium dioxide doped with metallic（Cu） and non-metallic（C, N, S） had been prepared by the sol-gel method taking tetrabutyl titanate as titanium source, cupric nitrate trihydrate as copper source, urea as nitrogen source, glucose as carbon source and thiourea as sulfur source. Then they were used for the experiment of photocatalytic degradation of rhodamine B under 12 W light. Finally, the samples with good catalytic degradation were characterized by XRD, SEM, IR, and specific surface area analysis.As in case of tetrabutyl titanate dosage of 5 mL, the glacial acetic acid dosage of 4 mL, the distilled water of 5mL, anhydrous ethanol dosage of 30 mL, pH of solution for 2-3, aging time of 72 h, the drying temperature of 80℃, calcination temperature of 400℃, the catalytic degradation rate of TiO₂ was highest（28.55%）.As in case of n（Cu）/n（Ti） of 0.01, the drying temperature of 80℃, calcination temperature of 500℃, the degradation rate was 70%; As in case of n（N）/n（Ti） of 0.6, the drying temperature of 80℃, calcination temperature of 600℃, the degradation rate was 65.3%; As in case of n（C）/n（Ti） of 0.01, the drying temperature of 80℃, calcination temperature of 500℃, the degradation rate was 63.5%; As in case of n（S）/n（Ti） of 0.1, the drying temperature of 80℃, calcination temperature of 600℃, the degradation rate was 64.5%.When the calcination temperature was 500℃, the catalytic degradation of（Cu, N） double doped TiO₂ could reach 88.5%. The optimization experiment of（Cu, N） double doped TiO₂ samples had been carried out and the results showed that in case of the dosage of catalyst of 0.8g/L, solution p H value of 6, solution solubility of 10mg/L, catalytic degradation time of 4h, the catalytic degradation rate was 91.5%.Compared with TiO₂ catalyst, the doped samples had larger specific surface area, wider infrared absorption peak. What’s more the particle size was more uniform distribution and smaller. As the synergy between the metal and nonmetal, the performance of catalytic degradation of double doped samples was superior to the single doped.