Manganese vanadate hollow tube fiber and preparation method and application thereof
A hollow tube, manganese vanadate technology, applied in the chemical characteristics of fibers, textiles and papermaking, chemical post-processing of rayon, etc., to achieve the effect of uniform tube wall thickness, good electrochemical performance, and expansion of application fields
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[0030] A kind of manganese vanadate hollow tube fiber of the present invention and preparation method thereof, comprises the following steps:
[0031] S1. Add 0.9g of manganese acetate and 0.9-3g of vanadyl acetylacetonate into 10mL of N,N-dimethylformamide solvent, stir and dissolve, then add 0.36-3g of polyvinylpyrrolidone to the mixed solution, and dissolve the mixture Stir at room temperature (25°C) for 6 to 12 hours to obtain an electrospinning solution with a certain viscosity, vanadyl acetylacetonate: polyvinylpyrrolidone: N,N-dimethylformamide solvent = 1 mmol: (0.5 to 3) mmol: (0.4~3)mmol: 10mL;
[0032] S2. Select 20-23 stainless steel needles, the distance from the needle to the collector is set to 15-25cm, the electrostatic field voltage is 15-30kV, and the pushing speed is 0.25-1mL / h to obtain oriented one-dimensional nanofibers ;
[0033] S3. Calcining the nanofibers obtained in the second step, the temperature is 400-600°C, the time is 2-5h, the heating rate i...
Embodiment 1
[0037] Add 0.9 g of manganese acetate and 0.9 vanadyl acetylacetonate into 10 mL of N,N-dimethylformamide solvent, stir and dissolve, then add 0.9 g of polyvinylpyrrolidone to the mixed solution, and place the mixture at room temperature (25 °C) stirring for 7 hours to obtain a uniformly dispersed electrospinning solution with a certain viscosity;
[0038]Inject the spinning solution into a 10mL syringe with a plastic spray gun head, select a stainless steel needle of No. 20 specification, inject the injection speed at 0.5mL / h, the distance between the spinneret and the collector is 19cm, and the spinning voltage is 30kV , the indoor temperature is 24°C, and the relative humidity is 25% to 30%. With the volatilization of the solvent, PVP / C can be obtained on the collector. 15 h 21 o 6 V / C 4 h 14 MnO 8 Composite nanofibers;
[0039] The PVP / C 15 h 21 o 6 V / C 4 h 14 MnO 8 The composite nanofibers were placed in a box-type furnace, heated to 400°C at 2°C / min for 2h, k...
Embodiment 2
[0042] Add 1.4g of manganese acetate and 1g of vanadyl acetylacetonate into 10mL of N,N-dimethylformamide solvent, stir and dissolve, then add 0.5g of polyvinylpyrrolidone to the mixed solution, and place the mixture at room temperature (25 °C) stirring for 6 hours to obtain a uniformly dispersed electrospinning solution with a certain viscosity;
[0043] Inject the spinning solution into a 10mL syringe with a plastic spray gun head, select a stainless steel needle of No. 23 specification, inject the injection speed at 0.25mL / h, the distance between the spinneret and the collector is 25cm, and the spinning voltage is 25kV , the indoor temperature is 24°C, and the relative humidity is 25% to 30%. With the volatilization of the solvent, PVP / C can be obtained on the collector. 15 h 21 o 6 V / C 4 h 14 MnO 8 Composite nanofibers;
[0044] The PVP / C 15 h 21 o 6 V / C 4 h 14 MnO 8 The composite nanofibers were placed in a box furnace, heated to 500 °C at 1 °C / min for 3 h, ke...
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