AgBr/TiO_2复合催化剂:双注法制备及其可见光催化性能  

AgBr/TiO_2 Composite Catalyst:Preparation by Double-Jet Method and Visible Light Photocatalytic Property

作　　者：曹静[1] 林海莉[1] 贾丽[1] 陈士夫[1] 

机构地区：[1]淮北煤炭师范学院化学与材料科学学院,安徽淮北235000

出　　处：《影像科学与光化学》2009年第6期462-468,共7页Imaging Science and Photochemistry

基　　金：国家自然科学基金(20673042);安徽省"含能材料"省级重点实验室科研基金(KLEM2009013)资助项目

摘　　要：以TiO2为载体,采用双注法合成了AgBr/TiO2复合光催化剂.利用X射线衍射仪(XRD)、紫外可见分光光度计(UV-Vis)和扫描电子显微镜(SEM)对AgBr/TiO2的结构、光吸收、形貌进行了表征.研究了AgBr/TiO2在可见光下对甲基橙和丁基罗丹明B的光催化活性.结果表明,与TiO2相比,AgBr/TiO2的光吸收范围拓展到400—600nm波段,并且随着AgBr负载量的增加,AgBr/TiO2的可见光吸收强度增强;当AgBr与TiO2的摩尔比为0.25时,AgBr/TiO2具有最大催化活性;在相同条件下,AgBr/TiO2对丁基罗丹明B的降解效果优于甲基橙.AgBr/TiO2 composite photocatalyst was prepared by double-jet method using TiO2 as substrate. The structure,light absorption and microscopy of AgBr/TiO2 were respectively measured by X-ray diffraction （XRD）,ultraviolet visible spectroscopy （UV-Vis） and scanning electron microscopy （SEM）. The photocatalytic activity of AgBr/TiO2 for degradation of methyl orange （MO） and butyl rhodamine B （b-RhB） was studied under visible light irradiation. The results showed that the light absorption of AgBr/TiO2 was broadened to 400—600 nm compared to TiO2. With increasing the content of AgBr in AgBr/TiO2,the light absorption intensity increased. AgBr/TiO2 showed maximal photocatalytic activity when the molar ratio of AgBr to TiO2 was 0.25. In addition,degradation efficiency of b-RhB with AgBr/TiO2 was higher than that of MO under the same condition.

关 键 词：AgBr/TiO2 双注法 可见光催化性能 甲基橙 

分 类 号：O643.36[理学—物理化学]