水热合成温度对氧化钒纳米管的影响

Influence of hydrothermal temperature on the vanadium oxide nanotubes

采用溶胶-凝胶法和水热法,以国产V2O5粉末、H2O2、十六胺为原材料,制备氧化钒纳米管。借助扫描电子显微镜(SEM)、透射电子显微镜(TEM)、X射线衍射(XRD)、傅立叶红外光谱(FT-IR)及循环伏安法(CV)等技术手段,重点研究了水热合成温度对氧化钒纳米管的形貌、结构及电化学性能的影响。结果表明:在150℃水热反应条件下制备的氧化钒纳米管产率高、形貌均一、管状结构完整;循环伏安测试表明该条件下的氧化钒纳米管具有较高的比容量和良好的锂离子嵌入/脱出可逆性。

Vanadium oxide nanotubes （VNT） were synthesized by sol-gel method and hydrothermal method with V205, H2O2 and C16 H33 NHz as raw materials. The morphology, structure and electrochemical performance of the samples associated with different hydrothermal treatment temperatures were investigated by scanning electron microscopy （SEM）, transmission electron microscopy （TEM）, X-ray powder diffraction （XRD）, Fourier transform infrared spectroscopy （FT- IR） and cyclic voltammetry （CV） measurements. It was found that the nanotubes prepared at 150~C had a high yield, uni- form morphology and perfect tubular structure. Meanwhile, the CV results showed that the materials also owned a high spe- cific capacity and an excellent Li＋ intercalation/deintercalation reversibility.