A kind of preparation method of activated carbon and product thereof
A technology of activated carbon and polyacrylonitrile, which is applied in chemical instruments and methods, carbon compounds, inorganic chemistry, etc., can solve the problems that the adsorption performance cannot meet the practical application requirements, the porosity and specific surface area are low, and the pore size distribution is single. It is suitable for popularization and use, high specific surface area, and the effect of simple and easy method
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Embodiment 1
[0026] The preparation of activated carbon comprises the following steps:
[0027] (1) Prepare a polyacrylonitrile precursor solution with a concentration of 8wt%, stir it at 40°C for 18 hours, inject it into a 5mL needle tube, and use a propeller to push it at a speed of 3mL / h, collect the released liquid in water, and precipitate White polyacrylonitrile pellets while stirring;
[0028] (2) Wash the pellets in step (1) 4 times with absolute ethanol, put them in an oven after suction filtration, and dry them at 60° C. for 18 hours;
[0029] (3) Take out the dried polyacrylonitrile pellets in step (2), fully soak them in sodium hydroxide solution for 18 hours, dry them at 60°C and place them in a high-temperature tube furnace for carbonization, and use nitrogen to protect them. Raise the temperature to 1000°C at a heating rate of 4°C / min, keep it for 1.5h, take it out after the temperature drops to room temperature, and obtain the activated carbon.
[0030] Using a scanning e...
Embodiment 2
[0032] The preparation of activated carbon, the steps are as follows:
[0033] (1) Prepare a polyacrylonitrile precursor solution with a concentration of 5wt%, stir it at 60°C for 12 hours, inject it into a 15mL needle tube, and use a propeller to push it at a speed of 1mL / h, collect the released liquid in water, and precipitate White polyacrylonitrile pellets while stirring;
[0034] (2) Wash the pellets in step (1) three times with absolute ethanol, put them in an oven after suction filtration, and dry at 400° C. for 24 hours;
[0035] (3) Take out the dried polyacrylonitrile pellets in step (2), fully soak them in potassium hydroxide solution for 24 hours, dry them at 40° C. and place them in a high-temperature tube furnace for carbonization, and use nitrogen to protect them. Raise the temperature to 800° C. at a heating rate of 3° C. / min, keep it for 2 hours, and take it out after the temperature drops to room temperature to obtain the activated carbon.
Embodiment 3
[0037] (1) Prepare a polyacrylonitrile precursor solution with a concentration of 12wt%, stir it at 25°C for 24 hours, inject it into a 20mL needle tube, use a propeller to push it at a speed of 5mL / h, collect the released liquid in water, and precipitate White polyacrylonitrile pellets while stirring;
[0038] (2) Wash the pellets in step (1) 5 times with absolute ethanol, put them in an oven after suction filtration, and dry at 80° C. for 12 hours;
[0039] (3) Take out the dried polyacrylonitrile pellets in step (2), fully soak them in sodium hydroxide solution for 12 hours, dry them at 80°C, and place them in a high-temperature tube furnace for carbonization, using argon for protection , the temperature was raised to 1200° C. at a heating rate of 5° C. / min, kept for 1 hour, and taken out after the temperature dropped to room temperature to obtain the activated carbon.
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