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.
出处
《中国稀土学报》
CAS
CSCD
北大核心
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
关键词
同轴静电纺丝
纳米管
氧化铈
光催化
稀土
coaxial electrospinning
nanotubes
cerium oxide
photocatalysis
rare earths
