同轴静电纺丝技术制备CeO_2纳米管及光催化性能研究  

Preparation of CeO_2 Nanotubes by Coaxial Electrospinning and Its Photocatalytic Performance

作　　者：徐淑芝[1] 董相廷[1] 盖广清[1] 刘桂霞[1] 王进贤[1] 鲁统晓[1] 

机构地区：[1]长春理工大学化学与环境工程学院,吉林长春130022

出　　处：《中国稀土学报》2012年第5期556-562,共7页Journal of the Chinese Society of Rare Earths

基　　金：国家自然科学基金项目(50972020;51072026);教育部博士点基金项目(20102216110002;20112216120003);吉林省科技发展计划重大项目(20070402;20060504);教育部科学技术研究重点项目(207026)资助

摘　　要：采用同轴静电纺丝技术,以硝酸铈、聚乙烯吡咯烷酮、N,N-二甲基甲酰胺和氯仿为原料,制备了CeO2纳米管。用差热-热重分析、X射线衍射、扫描电镜、透射电镜和能谱仪对样品进行了表征。考察了CeO2纳米管对罗丹明B溶液的光催化性能。结果表明:所得到的产物属于立方晶系、空间群为O5H-FM3M的CeO2纳米管,CeO2纳米管平均外径约270 nm,内径约110 nm,管壁厚度约80 nm,长度>20μm,对其形成机理进行了分析。相对于CeO2纳米线、纳米带和CeO2颗粒,CeO2纳米管对罗丹明B的降解率有明显提高。The CeO2 nanotubes were successfully syn- thesized by coaxial electrospinning using cerous ni- trate, polyvinyl pyrrolidone, N, N-dimethylformamide and chloroform as starting materials. The samples were characterized by thermogravimetry and differential thermal analysis, X-ray diffractometry, scanning elec- tron microscopy, transmission electron microscopy and energy dispersive spectroscopy techniques. The photo- catalytic properties of CeO2 nanotubes on rhodamine B were examined. The results showed that CeO2 nano-tubes were cubic in structure with space group OH5- FM3M. The CeO2 nanotubes was average outer diameter of 270 nm, internal diameter of 110 nm, wall thick- ness of 80 nm and lengths greater than 20 μm. The formation mechanism of the CeO2 nanotubes was pre- liminarily investigated. Comparing with CeO2 nanofi- bres, CeO2 nanobelts and CeO2 nanoparticles, the CeO2 nanotubes degradation rate had better catalytic activity on rhodamine B.

关 键 词：同轴静电纺丝 纳米管 氧化铈 光催化 稀土 

分 类 号：TB31[一般工业技术—材料科学与工程] TB383