Preparation method and application of chiral polypyrrole/Fe3O4/graphene composite material
A technology of composite materials and polypyrrole, which is applied in the direction of chemical instruments and methods, and other chemical processes, can solve the problems of cumbersome processes, unsatisfactory composite material absorbing properties, and inability to prepare composite materials with wide-band absorbing properties.
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[0025] A chiral polypyrrole / Fe 3 O 4 / Graphene composite preparation method, including the following steps:
[0026] 1) Preparation of graphene oxide:
[0027] Weigh 4.0 g of graphite powder into a 1000 mL beaker, add 120 mL of 98% concentrated sulfuric acid and 2.0 g of potassium nitrate in sequence, and stir for 30 minutes under electric power under the condition of an ice water bath. Weigh 12.0 g of potassium permanganate, slowly add it to the beaker in batches, and stir for 2 hours, during which the temperature of the solution is kept below 10°C. Then transfer the beaker to a preheated 40°C constant temperature water bath, and stir for 24 hours. Add 400mL deionized water to the beaker while stirring, and then add 50mL 30% hydrogen peroxide while stirring. The solution quickly becomes turbid, yellow and bright, and precipitates naturally for about 4 hours. Remove the supernatant and wash the precipitate 3-5 times with dilute hydrochloric acid , And finally washed with deionize...
Embodiment 1
[0032] Weigh 0.5g polypyrrole / Fe 3 O 4 / Graphene composite was added to 50ml deionized water, ultrasonically dispersed, 0.2mmol L-camphorsulfonic acid was dissolved in 10ml deionized water, and then added to the polypyrrole / Fe 3 O 4 Add L-camphorsulfonic acid aqueous solution to the graphene composite aqueous solution, let stand for 5 hours, and then suction filter the solid product obtained. The solid product obtained by filtration is washed with deionized water three times, then washed with ethanol three times, and then vacuum dried. The dried solid is L-polypyrrole / Fe 3 O 4 / Graphene composite material.
Embodiment 2
[0034] Weigh 0.5g polypyrrole / Fe 3 O 4 / Graphene composite was added to 50ml deionized water, dispersed uniformly by ultrasonic, 0.5mmol L-camphorsulfonic acid was dissolved in 10ml deionized water, and then added to the polypyrrole / Fe 3 O 4 Add L-camphorsulfonic acid aqueous solution to the graphene composite aqueous solution, let stand for 5 hours, and then suction filter the solid product obtained. The solid product obtained by filtration is washed with deionized water three times, then washed with ethanol three times, and then vacuum dried. The dried solid is L-polypyrrole / Fe 3 O 4 / Graphene composite material.
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