共沉淀法制备α-Bi_2Mo_3O_(12)和γ-Bi_2MoO_6及可见光催化性能  

Synthesis of α-Bi_2Mo_3O_(12) and γ-Bi_2MoO_6 by co-precipitation method and photocatalytic activity

作　　者：杜永芳[1] 宋继梅[2] 王红[2] 赵绍娟[2] 胡海琴[2] 

机构地区：[1]安徽职业技术学院化学工程系,安徽合肥230011 [2]安徽大学化学化工学院,安徽合肥230601

出　　处：《合肥工业大学学报（自然科学版）》2012年第11期1500-1505,共6页Journal of Hefei University of Technology：Natural Science

基　　金：安徽省自然科学基金资助项目(11040606M55);安徽省教育厅自然科学基金资助项目(KJ2010A015);安徽省高等学校"十五"优秀人才建设经费资助项目;安徽大学"211"工程建设资助项目

摘　　要：文章采用共沉淀法经调控pH值,在400℃煅烧下,制备了α-Bi2Mo3O12和γ-Bi2MoO62种钼酸铋材料,并对不同产物的形成机理进行了探讨,同时讨论了影响α-Bi2Mo3O12和γ-Bi2MoO62种钼酸铋光催化活性的因素。结果表明:当nBi/nMo=1∶2时,在低的pH值(3和5)时产物为α-Bi2Mo3O12;pH=7时,产物为β-Bi2Mo2O9和γ-Bi2MoO6两相的混合物;pH=9时,产物为γ-Bi2MoO6。光催化性能研究表明,Aurivillius结构的γ-Bi2MoO6在可见光区有较强的吸收和较高的光催化性能。Two kinds of bismuth molybdates α-Bi2Mo3O12 and γ-Bi2MoO6 were prepared by co-precipita- tion method. By tuning pH values and calcining at 400 ℃, the controlled formation of bismuth molyb- dates was achieved. When nBi/nMo=1： 2, low pH values （pH=3 and 5） led to the formation of α-Bi2Mo3O12 and pH=7 led to the formation of β-Bi2Mo3O9 and γ-Bi2MoO6. High pH value （pH=9） fa- vored the formation of γ-Bi2MoO6. Furthermore, a possible mechanism on the formation of bismuth molybdates was proposed. Photocatalytic studies indicated that γ-Bi2MoO6 withAurivillius structure showed more intense absorption band in the visible light region and better photocatalytic activity than α-Bi2Mo3O12 under sunlight irradiation.

关 键 词：α-Bi2Mo3O12 γ-Bi2MoO6 共沉淀法 光催化 

分 类 号：O61[理学—无机化学] X5[理学—化学]