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Synthesis of Boron-doped Monoclinic VO2 nanoparticles by sol-gel hydrothermal method
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Shenzhen University

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    Abstract:

    Boron-doped vanadium dioxide (VO2) nanopowders were prepared by the sol-gel hydrothermal method. Effect of process parameters including the hydrogen peroxide (H2O2) concentration, hydrothermal time, annealing temperature, type of boron dopant and boron doping amount on the synthesis of boron-doped VO2 powders was investigated. The structure, morphology and phase transition properties of the boron-doped VO2 powders were characterized by the X-ray diffractometer (XRD), X-ray photoelectron spectroscopy (XPS), inductively coupled plasma (ICP), field emission scanning electron microscopy (SEM) and differential scanning calorimetry (DSC). The results show that the superior synthesis process parameters are 15% for the H2O2 concentration, 72 h for the hydrothermal time, 600 °C for the annealing temperature, boric acid as the boron dopant, and less than 10 at.% for the boron doping amount. The obtained boron-doped VO2 powders have the size of around 100 nm with the morphology of coral-like structure. The boron atoms successfully replace the vanadium atoms in the VO2(M) lattice. The phase transition temperature is reduced by 7.2 °C, when the actual doping amount is 0.6 at.%.

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[Qiaoting Zhou,,Weizhong Lv. Synthesis of Boron-doped Monoclinic VO2 nanoparticles by sol-gel hydrothermal method[J]. Rare Metal Materials and Engineering,2020,49(4):1325~1330.]
DOI:10.12442/j. issn.1002-185X. sg20190086

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History
  • Received:May 20,2019
  • Revised:July 30,2019
  • Adopted:October 14,2019
  • Online: May 07,2020
  • Published: