A kind of preparation method and product of ultra-high specific surface area sulfur-nitrogen co-doped porous graphene
A technology of ultra-high specific surface area, porous graphene, applied in graphene, chemical instruments and methods, nano-carbon, etc., can solve the problem that polymer precursors and organic gases are toxic and harmful, graphene specific surface area is not high, and the preparation process is complicated. and other problems, to achieve the effect of improving application value, benefiting large-scale production and wide-ranging sources
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Embodiment 1
[0046] 1) Wash the pig hair and dry it. As for the argon atmosphere of the tube furnace, heat up to 300°C for initial carbonization. The holding time is 2 hours, and the heating rate is 1°C·min -1 ;
[0047] 2) Place the sample prepared in step 1) in a vacuum glove box at 0.5mol L -1 In KOH, adsorb under reduced pressure for 2 hours, set the air pressure to 10pa, and dry in an ordinary drying oven at 80°C for 12 hours;
[0048] 3) Put the sample in step 2) in the tube furnace, keep the argon atmosphere, raise the temperature to 350°C, keep it for 0.5h, then raise the temperature to 800°C, keep it for 1h, the heating rate is 5°C·min -1 , and then naturally cooled;
[0049] 4) Grinding the product obtained in step 3) and impregnating it in 0.5mol·L -1 H 2 SO 4 After pickling at constant temperature at 80°C for 8 hours in the solution, filter with suction and wash with water until neutral;
[0050] 5) The sample obtained in step 4) was placed in a vacuum drying oven (at a p...
Embodiment 2
[0053] 1) Wash the chicken feathers and dry them. As for the argon atmosphere in the tube furnace, heat up to 250°C for initial carbonization. The holding time is 3 hours, and the heating rate is 2°C·min. -1 ;
[0054] 2) Place the prepared sample in step 1) in the glove box 0.7mol L -1 In NaOH, absorb under reduced pressure for 1h, set the air pressure to 5pa, and dry in an ordinary drying oven at 90°C for 11h;
[0055] 3) Put the sample in step 2) in the tube furnace, keep the argon atmosphere, raise the temperature to 200°C, keep it for 1h, then raise the temperature to 700°C, keep it for 1h, the heating rate is 3°C·min -1 , and then naturally cooled;
[0056] 4) Grind the product obtained in step 3) and impregnate it in 0.3mol·L -1 After pickling at a constant temperature of 90°C for 5 hours in HCl solution, filter with suction, and wash with water until neutral;
[0057] 5) The sample obtained in step 4) was placed in a vacuum drying oven (at a pressure of 40 Pa, at a...
Embodiment 3
[0060] 1) Wash the duck feathers and dry them. As for the argon atmosphere of the tube furnace, heat up to 200°C for initial carbonization. The holding time is 4 hours, and the heating rate is 1.5°C·min. -1 ;
[0061] 2) Place the prepared sample in step 1) in the glove box 0.8mol L -1 In KOH, absorb under reduced pressure for 3 hours, set the air pressure to 20pa, and dry in an ordinary drying oven at 100°C for 10 hours;
[0062] 3) Put the sample in step 2) in the tube furnace, keep the argon atmosphere, raise the temperature to 300°C, keep it for 1h, then raise the temperature to 600°C, keep it for 0.5h, the heating rate is 4°C·min -1 , and then naturally cooled;
[0063] 4) Grinding the product obtained in step 3) and impregnating it in 0.6mol·L -1 After pickling in a hydrochloric acid solution at a constant temperature of 90°C for 10 hours, filter with suction, and wash with water until neutral;
[0064] 5) The sample obtained in step 4) was placed in a vacuum drying ...
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