Study On PreParation Of BaTiO₃ And Degradation Of Organic Pollutant Under Visible Light

With the development of modern industry,a large number of pesticide and dye wastewater are discharged into the water,causing serious pollution of the water environment.They are discharged into water and have strong chemical stability,which can make the water lose aesthetics and prone to eutrophication.They are typical of refractory organic pollutants and the treatment is a hot and difficult areas of domestic and international environment.In recent years,Barium titanate(BaTiO3)semiconductor photocatalytic technology has been widely used in dye wastewater treatment.BaTiO3 photocatalytic technology will become a research trend in the field of water treatment.The preParation of BaTiO3 nanoParticle as photocatalysts with microwave hydrothermal methods at room temperature was proposed.The effects of selected process Parameters such as microwave hydrothermal time,microwave hydrothermal pressure,irradiation time and catalyst dose on their photocatalytic performance under visible light were assessed in detail,which using organophosphorus pesticide,methyl Parathion as model compounds.The result showed that BaTiO3 has photocatalytic activity for degradation of 10 mg/L methyl Parathion.When irradiation time is 24.0 h,and catalyst dose is 2.0 g/L,degradation rate is up to 77.84%.We also use liquid chromatography and ion chromatography to detecte the degradation products of different time.The results show that most methyl Parathion molecules could be effectively degraded and almost mineralized to simple inorganic ions,with irradiation time extending.The preParation of N-BaTiP3,F-BaTiO3,N-F-BaTiO3 nanoParticle as photocatalysts with microwave hydrothermal methods at room temperature was proposed.The effects of selected process Parameters such as nitrogen(N)or fluorine(F)and Ti,microwave hydrothermal time,microwave hydrothermal pressure,irradiation time,initial concentration,irradiation time,catalyst dose,and light power on their photocatalytic performance under visible light were assessed in detail,using acid orange Ⅱ as a model contaminant in aqueous solution.The results showed that N-F-BaTiO3 has hightest photocatalytic activity for degradation of 10mg·L-1 acid orange Ⅱ,when irradiation time is 10.0 h,catalyst dose is 2.0 g/L,degradation rate is up to 100%.The degradation rate of acid orange Ⅱ is 94.71%in the presence of N-BaTiO3.The degradation rate of acid orange Ⅱ is 92.18%in the presence of F-BaTiO3,We also use liquid chromatography and ion chromatography to detecte the degradation products.The results show that most acid orange II molecules could be effectively degraded and almost mineralized to simple inorganic ions.