Preparation method of low-cost three-dimensional porous graphene
A three-dimensional porous and graphene technology, applied in graphene, chemical instruments and methods, inorganic chemistry, etc., can solve the problems of cumbersome process, many uncontrollable factors, complex reaction process, etc., and achieve abundant raw material sources, simple process equipment, The effect of reducing process steps
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Embodiment 1
[0037] A preparation method of three-dimensional porous graphene, comprising the steps of:
[0038] Add petroleum asphalt into a three-necked flask, use dichloromethane as solvent, the mass ratio of petroleum asphalt and dichloromethane is 1:2, heat and stir, the stirring temperature is 80 ℃, then add zinc oxide and nano-magnesium oxide, petroleum asphalt The mass ratio of zinc oxide and nano-magnesium oxide is 1:2:1.5, and nitrogen gas is passed through, and the stirring time is 2h. After stirring evenly, the solvent was distilled off under reduced pressure, placed in a vacuum oven at 50° C. for 4 hours, and cooled to room temperature. The dried sample was placed in an atmosphere furnace, fed with nitrogen, heated to 800°C at 10°C / min, kept at 1h, then raised to 1300°C at 4°C / min, kept at 2h, cooled to room temperature and taken out. The carbonized product was placed in a sulfuric acid solution (the molar concentration of the acid solution was 2 mol / L), stirred for 2 hours a...
Embodiment 2
[0040] Add sucrose into a three-necked flask, use deionized water as solvent, the mass ratio of sucrose and deionized water is 1:3, heat and stir, the stirring temperature is 70 ℃, then add zinc chloride and magnesium citrate, sucrose, chlorine The mass ratio of zinc chloride and magnesium citrate is 1:3:3, and nitrogen gas is introduced, and the stirring time is 3h. After stirring evenly, the solvent was distilled off under reduced pressure, placed in a vacuum oven at 60°C for 3.5 hours, and cooled to room temperature. The dried sample was placed in an atmosphere furnace, fed with nitrogen, heated to 800°C at 4°C / min, kept at 2h, then raised to 1800°C at 2°C / min, kept at 2h, cooled to room temperature and taken out. The carbonized product was placed in a hydrochloric acid solution (the molar concentration of the acid solution was 1 mol / L), stirred for 4 hours at a stirring speed of 80 r / min, filtered and separated, washed with deionized water and ethanol until neutral. Place...
Embodiment 3
[0042] Add epoxy resin into a three-necked flask, use ethyl acetate as solvent, the mass ratio of epoxy resin to ethyl acetate is 1:4, heat and stir at 120°C, then add zinc phthalocyanine and nano magnesium oxide , the mass ratio of epoxy resin, zinc phthalocyanine and nano-magnesium oxide is 1:3:4, and nitrogen gas is introduced, and the stirring time is 1.5h. After stirring evenly, the solvent was distilled off under reduced pressure, placed in a vacuum oven at 80°C for 3 hours, and cooled to room temperature. The dried sample was placed in an atmosphere furnace, fed with nitrogen, heated to 800°C at 5°C / min, kept at 2h, then raised to 1500°C at 3°C / min, kept at 2h, cooled to room temperature and taken out. The carbonized product was placed in a hydrochloric acid solution (the molar concentration of the acid solution was 1 mol / L), stirred for 3 hours at a stirring speed of 100 r / min, filtered and separated, washed with deionized water and ethanol until neutral. Place in a d...
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