One-step hydrothermal conversion of VO₂(B) into W-doped VO₂(M) and its phase transition and optical switching properties

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• 作者：Yifu Zhang ; Xiongzhi Zhang ; Yu Huang ; Chi Huang ; Fei Niu ; Changgong Meng ; Xiaoyu Tan
• 关键词：A. Nanostructures ; A. VO2(M) ; D. Optical properties ; D. Phase transitions
• 刊名：Solid State Communications
• 出版年：February, 2014
• 年：2014
• 卷：180
• 期：Complete
• 页码：24-27
• 全文大小：1385 K

文摘

W-doped monoclinic vanadium dioxide VO₂(M) nanobelts have been transformed from VO₂(B) nanobelts in the presence of tungstic acid by a facile one-step hydrothermal route for the first time. The as-prepared samples were characterized by X-ray photoelectron spectroscopy (XPS), X-ray powder diffraction (XRD), transmission electron microscopy (TEM), differential scanning calorimetry (DSC) and variable-temperature infrared spectroscopy (IR). The results show that W atoms are doped into the crystal lattice of VO₂(M) matrix, and the morphology and size of the as-obtained VO₂(M) nanobelts are dependent on that of the precursor VO₂(B). The phase transition temperature (T_c) of W-doped VO₂(M) can be tuned by W doping. The variable-temperature IR reveals that the as-synthesized W-doped VO₂(M) nanobelts have outstanding thermochromic characters and optical switching properties.