Ultra-loose graphitized structure porous carbon nanofiber and electrostatic spinning-carbonizing preparation method thereof
A nanofiber and electrospinning technology, which is applied to structural parts, circuits, electrical components, etc., can solve the problems of no carbon nanofiber preparation method, and achieve the effect of simple preparation method, easy reaction conditions and uniform distribution
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[0031] Example 1
[0032] Weigh 1.5g zinc nitrate, 6g cobalt nitrate, 1g urea with an electronic balance, dissolve it in distilled water, react at 110℃ for 12 hours, filter and wash with distilled water, and dry at 50℃ for 8 hours to obtain ZnCo 2 O 4 The precursor is then annealed at 400℃ and ball milled for 3 hours to prepare ZnCo 2 O 4 Particles. ZnCo 2 O 4 See the XRD image of the particles figure 1 .
[0033] Weigh ZnCo accurately with analytical balance 2 O 4 And polyacrylonitrile (PAN) powder (of which ZnCo 2 O 4 , PAN mass ratio 0.5: 2, and the molar mass of PAN M = 100000g / mol, mass fraction is 8%) placed in a 20ml sample bottle, use a pipette to accurately pipette 10ml of NN dimethylformamide (DMF) , The sample bottle was sealed with raw material tape, heated to 50℃, stirred for 36 hours, and finally prepared ZnCo 2 O 4 / PAN Electrospinning solution with uniform dispersion.
[0034] Electrospinning equipment is used to prepare nanofibers, which are carbonized at 850°C to o...
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[0036] Example 2
[0037] Use an electronic balance to weigh 1g zinc oxide, 1g cobalt tetroxide and polyacrylonitrile (PAN) powder (the mass ratio of the three is 1:1:8, and the molar mass of PAN = 120000g / mol) and place them in a 20ml sample bottle. Pipette 12ml of NN dimethylformamide (DMF, PAN accounts for 10% of the mass of DMF). The sample bottle is sealed with a raw material tape, heated to 50℃, stirred for 36 hours, and finally a uniform electrospun is obtained. Silk liquid.
[0038] Electrospinning equipment is used to prepare nanofibers, which are carbonized at 950°C to prepare cobalt / graphitized porous carbon nanofibers. The SEM scanning electron micrograph of the porous material prepared in this example is shown in Figure 4 .
Example Embodiment
[0039] Example 3
[0040] Weigh 1g of zinc oxide, 0.5g of cobalt oxide and 2g of polyacrylonitrile (PAN) powder with an electronic balance (the mass ratio of the three is 2:1:4, and the molar mass of PAN is M=140000g / mol) and dissolved in DMF solution The medium (PAN accounts for 20% of the mass of DMF) is placed in a 20ml sample bottle, heated to 50°C, stirred for 36 hours, and finally a uniformly dispersed electrostatic spinning solution is prepared.
[0041] Electrospinning equipment is used to prepare nanofiber membranes, which are carbonized at 1050°C to prepare super-porous and porous carbon nanofibers.
[0042] The prepared cobalt / porous carbon fiber was cleaned and purified in 3M nitric acid at 100°C and 1MPa to obtain pure porous carbon nanofibers with graphitized structure. The SEM scanning electron micrograph of the porous material prepared in this example is shown in Figure 5 .
[0043] It can be seen through the SEM scanning electron microscope that both Examples 1 and...
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