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OH5-FM3M的CeO2纳米管,CeO2纳米管平均外径约270nm,内径约110nm,管壁厚度约80nm,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.