The Preparation And Properties Of BiVO₄ And Bi₂MoO₆ Photocatalyst

With the development of technology and economy,the pollution of human environment is becoming increasingly serious.In recent years,it has become an important task for environmental protection workers to develop new efficient and practical environmental protection technologies.Photocatalytic technology with strong oxidizing species generated by semiconductor materials excited in light conditions to decompose pollutants into inorganic small molecules such as CO₂ and H₂O do not consume other energy.Compared with other pollutants treatment methods,it has the advantages of large processing range,Photocatalytic os an environmentally friendly and green technology,which has broad application prospects in the solution of pollution problems.The photocatalyst bismuth vanadate was prepared by hydrothermal method,and the morphology of bismuth vanadate was controlled by adding melamine to improve its catalytic activity.Preparing bismuth molybdate under hydrothermal system and do non-metal?Br?and metal?V?doping on bismuth molybdate to further promote the photocatalytic activity of bismuth molybdate,Discussed the effects of melamine dosage,non-metallic and metallic doping amount on the photocatalytic activity were investigated.Through a series of characterization methods,The effects of the amount of melamine added and the amount of nonmetallic metal doping on the phase composition were sutdied,crystal structure,light absorption property and valence state of bismuth vanadate and bismuth molybdate.The results show:?1?The photocatalytic performance of BiVO4 can be improved by single element doping with melamine.When the ratio of it up to 0.2,the decolorization rate of BiVO₄ to Methyl orange was 95%,respectively,and the photocatalytic activity was higher than that of pure BiVO₄?60%??2?The photocatalytic performance of Bi₂MoO₆ can be improved by single element doping with nonmetallic element Br When the ratio of Br up to 1.2%,the decolorization rate of Bi₂MoO₆ to rhodamine B was 76%,respectively,and the photocatalytic activity was higher than that of pure Bi₂MoO₆?52%??3?The results show that the photocatalytic performance of Bi₂MoO₆ can be improved by single element doping with nd metal V.When the ratio of and V up to1.0%,the decolorization rate of Bi₂MoO₆ to rhodamine B was 73%,respectively,and the photocatalytic activity was higher than that of pure Bi₂MoO₆?52%?.