A kind of pure tungsten nanofiber, its preparation method and application
A technology of nanofibers and tungsten compounds, which is applied in the field of its preparation and pure tungsten nanofibers, can solve the problems of large differences in performance, unstable chemical properties of metal nanowires, and reduced conductivity of nanowires, so as to ensure continuity, High cost performance and low calcination temperature
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[0031] figure 1 It is a flowchart of a method for preparing pure tungsten nanofibers constructed according to a preferred embodiment of the present invention, comprising the following steps:
[0032] (1) Prepare an electrospinning solution, and transfer it to an electrospinning device for electrospinning to obtain tungsten-containing precursor nanofibers. The electrospinning solution is to dissolve a tungsten-containing compound and a polymer binder in In the mixture of water and organic solvent, stir evenly to obtain a uniform and stable solution; the weight percentages of each component in the electrospinning solution are: tungsten-containing compound 5% to 20%, polymer binder 20% to 40% %, organic solvent 15%~25%, water 30%~50%; the voltage of electrospinning is 8kV~40kV, the distance of electrospinning is 10cm~30cm, the flow rate of electrospinning liquid is 2mL / h~5mL / h; The tungsten-containing compound is one or more of ammonium metatungstate, tungstic acid or tungsten i...
Embodiment 1
[0039] Such as figure 1 As shown, first, prepare the electrospinning solution, dissolve 10g ammonium metatungstate and 30g PVP in the mixed solution of 20g water and 40g ethanol, stir evenly to obtain a uniform and stable solution; then, transfer the electrospinning solution to the spinning Electrospinning is carried out in the silk equipment to obtain tungsten-containing precursor nanofibers. Wherein, the spinning voltage is 18kV, the spinning distance is 15cm, and the flow rate of the spinning solution is 4mL / h. Secondly, the above tungsten-containing precursor nanofibers were placed in a resistance furnace for pre-oxidation treatment to obtain WO 3 Nanofibers. Among them, the heating rate of the resistance furnace was set at 8°C / min, the holding temperature was 600°C, and the holding time was 4h. Finally, the WO 3The nanofibers were transferred to a tube furnace for reduction treatment to obtain pure tungsten nanofibers. The heating rate is 10°C / min, the holding temper...
Embodiment 2
[0041] Such as figure 1 As shown, first, prepare the electrospinning solution, dissolve 10g ammonium metatungstate and 30g PVP in the mixed solution of 20g water and 40g ethanol, stir evenly to obtain a uniform and stable solution; then, transfer the electrospinning solution to the spinning Electrospinning is carried out in the silk equipment to obtain tungsten-containing precursor nanofibers. Wherein, the spinning voltage is 18kV, the spinning distance is 15cm, and the flow rate of the spinning solution is 4mL / h. Secondly, the above tungsten-containing precursor nanofibers were placed in a resistance furnace for pre-oxidation treatment to obtain WO 3 Nanofibers. Among them, the heating rate of the resistance furnace was set at 8°C / min, the holding temperature was 700°C, and the holding time was 4h. Finally, the WO 3 The nanofibers were transferred to a tube furnace for reduction treatment to obtain pure tungsten nanofibers. The heating rate is 10°C / min, the holding tempe...
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