【摘要】 以TS-1分子筛为光催化剂,H2O2为氧化剂,紫外灯为光源,对农药氧化乐果进行光催化氧化降解研究。详细考察了催化剂添加质量浓度,H2O2添加体积分数和光照时间对氧化乐果降解率的影响。实验结果表明,TS-1分子筛催化剂对氧化乐果具有很好的催化降解活性。氧化乐果可以降解为CO2,NH3,SO42-,PO43-等。最佳反应条件:催化剂质量浓度5 g/L,H2O2体积分数30 mL/L,光照时间90 min,氧化乐果降解率高达96%。此反应为一级动力学反应。三次再生后,TS-1分子筛对氧化乐果的光催化活性没有明显降低。更多还原

【Abstract】 Photocatalytic oxidation of omethoate with H2O2 was studied with Ti-containing zeolite(TS-1) as photocatalyst under ultraviolet lamp irradiation.The effects of photocatalyst adding mass concentration,H2O2 adding volume fraction and radiation time on the degradation rate of omethoate were investigated.The results show that TS-1 exhibits very good photocatalytic degradation activity to omethoate.Omethoate can be photo-oxidized to CO2,NH3,SO2-4,PO3-4.The optimum conditions are the photocatalyst mass concentration of 5 g/L,H2O2 volume fraction of 30 mL/L and an irradiation time of 90 min.Under these conditions,the degradation rate of omethoate is up to 96%.The photocatalytic oxidation of omethoate is first-order kinetic reaction.The activity of photocatalyst is not decreased obviously after being reused three times.更多还原