Direct formation of single crystal VO₂(R) nanorods by one-step hydrothermal treatment

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• 作者：Shidong Ji ; Yangang Zhao ; Feng Zhang ; Ping Jin
• 关键词：A1. Crystal morphology ; A2. Hydrothermal crystal growth ; B1. Vanadium dioxide nanorods ; B2. Optical materials
• 刊名：Journal of Crystal Growth
• 出版年：2010
• 出版时间：1 January 2010
• 年：2010
• 卷：312
• 期：2
• 页码：282-286
• 全文大小：420 K

文摘

Pure phase VO₂(R) nanorods were directly synthesized via the reduction of V₂O₅ by oxalic acid during one-step hydrothermal treatment. The products were characterized by X-ray diffraction, field-emission scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, FT-IR and UV–vis spectroscopy. By adding a proper amount of H₂SO₄ as morphology control agent, monodispersed single crystal VO₂(R) nanorods were obtained from the hydrothermal solution for the first time at relatively lower temperature (260 °C) and even shorter time (4 h). The prepared nanorods showed very excellent thermochromic property with narrower hysteresis and lower phase transformation temperature compared with bulk materials.