Preparation method and application of carbon nanohorn/graphene/polyaniline composite material
A technology of carbon nanohorns and composite materials, applied in the direction of hybrid capacitor electrodes, etc., can solve the problems of poor cycle stability of polyaniline, achieve the effects of improving stability, excellent electrochemical performance, and increasing specific capacitance
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Embodiment 1
[0043] (1) Graphene oxide was prepared by the improved Hummers method. After step-by-step centrifugation and ultrasonic dispersion for 1 h, a uniform dispersion was obtained with a solid content of 3.17 mg / mL. Measure 34.5 mL (0.1094 g) of graphene oxide to disperse solution in a 50 mL beaker.
[0044] (2) Add 0.0547 g of carbon nanohorns to the above graphene oxide dispersion, ultrasonically disperse for 1 h, and then add 4.4 mL of concentrated sulfuric acid to make the H in the solution 2 SO 4 The concentration was 2 mol / L, and then 0.91 mL of aniline monomer was added, stirred and kept at 5°C for 30 min.
[0045] (3) Another 4.564 g of ammonium persulfate was added to 10 mL of 2 mol / L sulfuric acid, and after the dissolution was complete, it was incubated at 5°C for 30 min.
[0046] (4) Slowly add the solution in (3) to the solution in (2), mix well and react at 5°C for 12 h. Wash with deionized water to pH = 7, and dry at 60 °C to constant weight to obtain carbon nanoho...
Embodiment 2
[0048] 1) Graphene oxide was prepared by the improved Hummers method. After step-by-step centrifugation and ultrasonic dispersion for 1 h, a uniform dispersion with a solid content of 3.17 mg / mL was obtained. Take 34.5 mL (0.1094 g) of the graphene oxide dispersion in in a 50 mL beaker.
[0049] (2) Add 0.0547 g of carbon nanohorns to the above graphene oxide solution, ultrasonically disperse for 1 h, add 1.19 mL of water and 3.4 mL of concentrated hydrochloric acid to make the concentration of HCl in the solution 1 mol / L, and then add 0.91 mL of Aniline monomer, stirred for 2 hours, and kept at 0°C for 30 minutes.
[0050] (3) Another 2.282 g of ammonium persulfate was added to 10 mL of 1 mol / L dilute hydrochloric acid, and after the dissolution was complete, it was incubated at 0 °C for 30 min.
[0051] (4) Slowly add the solution in (3) into the solution in (2), mix well and react at 0 °C for 24 h. Wash with deionized water to pH = 7, and dry at 60 °C to constant weight t...
Embodiment 3
[0053] 1) Graphene oxide was prepared by the improved Hummers method. After step-by-step centrifugation and ultrasonic dispersion for 1 h, a uniform dispersion was obtained with a solid content of 3.17 mg / mL. Take 16.3 mL (0.0517 g) of graphene oxide dispersion in a 50 mL beaker.
[0054] (2) Add 0.0517 g of carbon nanohorns to the above graphene oxide solution, ultrasonically disperse for 1 h, add 16 mL of water and 6.8 mL of concentrated hydrochloric acid to make the concentration of HCl in the solution 2 mol / L, and then add 0.91 mL of Aniline monomer, stirred for 2 h, and incubated at 5°C for 30 min.
[0055] (3) Another 5.406 g of potassium persulfate was added to 10 mL of 2 mol / L hydrochloric acid, and after complete dissolution, it was incubated at 5 °C for 30 min.
[0056] (4) Slowly add the solution in (3) into the solution in (2), mix well and react at 0 °C for 24 h. Wash with deionized water to pH = 7, and dry at 60 °C to constant weight to obtain carbon nanohorn / g...
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