Method for transforming vanadium dioxide from B phase to doped M phase
A technology of vanadium dioxide and phase transformation, which is applied in the direction of vanadium oxide and nanotechnology, can solve the problems of complex process, high cost, and inability to obtain phase transition temperature, etc., and achieve good reproducibility, high controllability, and simple process Effect
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Embodiment 1
[0019] 0.40 g VO 2 (B) Add to 39.60 g distilled water, then add 0.0040 g dopant tungstic acid, stir for 0.5 h with a magnetic stirrer; transfer the obtained turbid liquid to a hydrothermal reaction kettle, and react at 300 °C for 24 h , after naturally cooling down to room temperature, the material is discharged, centrifuged, washed with deionized water, and dried in vacuum to obtain VO 2 (M) and VO 2 A mixture of (A), such as figure 1 Shown: where figure 1 a is the XRD pattern of the prepared product, indicating that the prepared product is VO 2 (M) and VO 2 a mixture of (A); figure 1 b is the TEM image of the prepared product, indicating that the prepared product is a nanobelt.
Embodiment 2
[0021] 0.40 g VO 2 (B) Added to 39.574 g of distilled water, then added 0.026 g of dopant tungstic acid, stirred with a magnetic stirrer for 0.5 h; transferred the obtained turbid liquid to a hydrothermal reaction kettle, and reacted at 280 °C for 48 h , after naturally cooling down to room temperature, the material is discharged, centrifuged, washed with deionized water, and dried in vacuum to obtain W-doped VO 2 (M), such as figure 2 Shown: where figure 2 a is the XRD pattern of the prepared product, indicating that the prepared product is VO 2 (M); figure 2 b is the electron spectrum (EDS) pattern of the prepared product, indicating that the prepared product contains three elements of V, O and W, combined with the XRD pattern to indicate that the product is W-doped VO 2 (M) split material; figure 2 c is a TEM image of the prepared product, indicating that the prepared product is a nanobelt; figure 2 d is the DSC diagram of the prepared product, indicating that th...
Embodiment 3
[0023] 12.00 g VO 2(B) Add to 26.00 g of distilled water, then add 2.00 g of dopant ammonium molybdate, stir for 0.5 h with a magnetic stirrer; transfer the obtained turbid liquid to a hydrothermal reaction kettle, and react at 280 °C for 72 h, after naturally cooling down to room temperature, the material was discharged, centrifuged, washed with deionized water, and dried in vacuum to obtain Mo-doped VO 2 (M), image 3 a is the XRD pattern of the prepared product.
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