Preparation method and application of molybdenum phosphide/carbon fiber composite material
A composite material and carbon fiber technology, applied in the direction of phosphide, fiber chemical characteristics, rayon manufacturing, etc., can solve the problems of difficult removal of long-chain organic solvents, corrosiveness, phosphine toxicity, etc., to improve cycle stability, The effect of strong solubility and high redox activity
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[0032]Example 1
[0033](1) Mix 0.5 mL of 70% phytic acid solution with 9.5 mL of DMF, add 0.5 g of phosphomolybdic acid and 1.5 g of polyvinylpyrrolidone, and stir thoroughly to form a uniform spinning solution.
[0034](2) Put the spinning solution in step (1) into a syringe and connect it with a 0.7 mm needle. Electrospinning is carried out using electrostatic spinning equipment to obtain phosphomolybdic acid / PVP composite fiber membrane. Among them, the aluminum foil-covered cylinder is the receiver, the negative high voltage is -2kV, the positive high voltage is 14kV, the receiving distance is 15cm, the relative humidity is 50%, and the ambient temperature is 50°C.
[0035](3) Put the phosphomolybdic acid / PVP composite fiber membrane obtained in step (2) in a temperature-programmed muffle furnace, set the heating rate to 2°C / min, and react in an air atmosphere at 280°C for 2h. Then it was transferred to a tube furnace, heated to 700°C at a rate of 5°C / min under a nitrogen atmosphere and...
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[0038]Example 2
[0039](1) Mix 1 mL of 70% phytic acid solution with 9 mL of DMF, add 0.5 g of phosphomolybdic acid and 0.6 g of polyacrylonitrile, and stir thoroughly to form a uniform spinning solution.
[0040](2) Put the spinning solution in step (1) into a syringe and connect it with a 0.7 mm needle. Electrospinning is performed using electrostatic spinning equipment to obtain composite fiber membranes. Among them, the aluminum foil-covered cylinder is the receiver, the negative high voltage is -2kV, the positive high voltage is 14kV, the receiving distance is 15cm, the relative humidity is 50%, and the ambient temperature is 50°C.
[0041](3) Place the composite fiber membrane obtained in step (2) in a temperature-programmed muffle furnace, set the heating rate to 2° C. / min, and react in an air atmosphere at 280° C. for 1 hour. After that, it was transferred to a tube furnace, heated to 800°C at a rate of 2°C / min under a nitrogen atmosphere and kept for 2h, and cooled naturally to obt...
Example Embodiment
[0043]Example 3
[0044](1) Mix 0.5 mL of 70% phytic acid solution with 9.5 mL of DMF, add 0.25 g of phosphomolybdic acid and 1.5 g of polyvinylpyrrolidone, and stir well to form a uniform spinning solution.
[0045](2) Put the spinning solution in step (1) into a syringe and connect it with a 0.7 mm needle. Electrospinning is carried out using electrostatic spinning equipment to obtain phosphomolybdic acid / PVP composite fiber membrane. Among them, the aluminum foil-covered cylinder is the receiver, the negative high voltage is -2kV, and the positive high voltage is 14kV; the receiving distance is 15cm; the relative humidity is 40%, and the ambient temperature is 55°C.
[0046](3) Place the phosphomolybdic acid / PVP composite fiber membrane obtained in step (2) in a temperature-programmed muffle furnace, set a heating rate of 2°C / min, and react in an air atmosphere at 230°C for 2h. Then transferred to tube furnace, in Ar / H2Atmosphere (volume ratio Ar:H2=0.95:0.05), the temperature is increase...
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