Surfactant-Assisted Hydrothermal Growth of Single-Crystalline Ultrahigh-Aspect-Ratio Vanadium Oxide Nanobelts

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• 作者：Shufeng Shi ; Minhua Cao ; Xiaoyan He ; Haiming Xie
• 刊名：Crystal Growth & Design
• 出版年：2007
• 出版时间：September 2007
• 年：2007
• 卷：7
• 期：9
• 页码：1893 - 1897
• 全文大小：430K
• 年卷期：v.7,no.9(September 2007)
• ISSN：1528-7505

文摘

Single-crystalline vanadium oxide nanobelts were obtained through a surfactant-directed growth process underhydrothermal conditions using V₂O₅ as a precursor. The shape and size were observed by scanning electron microscopy (SEM) andtransmission electron microscopy (TEM). X-ray powder diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), ultraviolet/visible (UV/vis) spectroscopy, X-ray photoelecton spectroscopy (XPS), high-resolution TEM (HRTEM), and selected area electrondiffraction (SAED) were used to characterize the composition and structure of the as-prepared nanobelts. The as-obtained vanadiumoxide nanobelts are up to several hundreds of micrometers in length, 100-200 nm in diameter, and 20-30 nm in thickness. Apossible mechanism was proposed to account for the formation of the nanobelts. The influence of the concentration of reactants, thereaction time, the concentration of the surfactant, and the reaction temperature on the morphology of the resulting products arediscussed in detail. Furthermore, we tested the electrochemical intercalation properties with Li⁺ of the postannealing sample bycalcining the obtained vanadium oxide nanobelts at 400 C. It was found that the morphology and the structure of the synthesizedproduct had an important influence on the electrochemical intercalation properties.