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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。
Using coaxial electrospinning technology, cerium nitrate, polyvinylpyrrolidone, N, N-dimethylformamide and chloroform as raw materials, CeO2 nanotubes were prepared. The samples were characterized by DTA - TG, XRD, SEM, TEM and EDS. The photocatalytic activity of CeO2 nanotubes on rhodamine B solution was investigated. The results show that the obtained product belongs to CeO2 nanotube with cubic system and O5H-FM3M space group. The average diameter of CeO2 nanotube is about 270 nm, the inner diameter is about 110 nm, the thickness of the tube wall is about 80 nm and the length is about 20 μm. Its formation mechanism was analyzed. Compared with CeO2 nanowires, nanobelts and CeO2 particles, the degradation rate of rhodamine B by CeO2 nanotubes was significantly increased.