Bi_2MoO_6可见光催化去除4BS染料实验研究  

4BS REMOVAL INDUCED BY Bi_2MoO_6 UNDER VISIBLE LIGHT IRRADIATION

作　　者：陈亚[1] 陈建林[1] 姚三丽[1] 周懿[1] 许岳泰[1] 

机构地区：[1]南京大学环境学院,污染控制与资源化研究国家重点实验室,南京210093

出　　处：《环境化学》2009年第6期809-812,共4页Environmental Chemistry

摘　　要：以Bi(NO3)3.5H2O和(NH4)6Mo7O24.4H2O为原料,采用预超声-水热法合成可见光催化剂Bi2MoO6,考察了在可见光催化条件下,催化剂的用量、污染物初始浓度、溶液pH值等因素对偶氮染料直接耐酸大红4BS去除效果的影响.结果表明,4BS溶液初始浓度为20mg.l-1、原始pH值6.90条件下,催化剂的最佳投加量为2g.l-1,光照60min后,4BS去除率达到92.7%;在实验浓度20—100mg.l-1的范围内,催化剂投加量为2.0g.l-1,光照210min后染料去除量最大可达到约50mg.l-1,溶液在弱酸或弱碱性条件下脱色较为稳定,在强酸或强碱性条件下脱色较快,效果明显;催化剂重复使用前后结构和成分稳定,但光催化活性有所下降.Visible-light-driven Bi2MoO6 photocatalyst was prepared by hydrothermal process with previously ultrasonic treatment. The effects of photocatalytic activity of Bi2MoO6 catalyst were evaluated by the decoloration of aqueous 4BS dye at room temperature under visible light irradiation. When the concentration of the aqueous 4BS dye was 20mlat the initial pH 6. 90 , the best dosage of Bi2MoO6 catalyst was 2g·l^-1 , and the removal rate was 92. 7% after 60min. The structure and composition of Bi2 MoO6 catalyst was stable after use of five times, but photocatalytie activity declined.

关 键 词：Bi2MoO6 预超声-水热合成 光催化 4BS 

分 类 号：X703[环境科学与工程—环境工程]