Preparation method for nitrogen-doped humic acid based porous carbon material with high adsorption performance
A black humic acid-based, nitrogen-doped technology, applied in chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., can solve problems such as difficult processing, low added value of products, and low utilization rate
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Embodiment 1
[0022] Example 1: Take 2g of black humic acid and 6g of potassium hydroxide and add them to a beaker of 80ml of water, ultrasonically disperse for 5 minutes to form a mixed solution, place the mixed solution on a magnetic stirrer and stir for 4 hours, then set the speed of the centrifuge to 9000r / min , centrifuged for 8 min, and the centrifuged product of the lower layer was placed in a drying oven at 90°C, dried and ground, then put into a tube furnace, and heated from room temperature to 750°C under an argon atmosphere at a heating rate of 10°C / min. After calcination at 750°C for 2 hours, the calcined sample was taken out, pickled with 35wt% dilute hydrochloric acid, washed with a small amount of deionized water and filtered until neutral, then dried to obtain a black humic acid-based porous carbon material.
Embodiment 2
[0023] Example 2: Add 2g of black humic acid, 6g of potassium hydroxide and 0.4g of melamine into a beaker of 80ml of water, ultrasonically disperse for 5 minutes to form a mixed solution, place the mixed solution on a magnetic stirrer and stir for 4 hours, then set the speed of the centrifuge Centrifuge at 9000r / min for 8min, place the centrifuged product in the lower layer in a drying oven at 90°C, dry and grind it, put it into a tube furnace, and heat it from room temperature to 750°C under an argon atmosphere, with a heating rate of 10°C / min. , after calcination at 750°C for 2h, the calcined sample was taken out, pickled with 35wt% dilute hydrochloric acid, washed with a small amount of deionization, filtered to neutral and then dried to obtain a nitrogen-doped black humic acid-based porous carbon material.
Embodiment 3
[0024] Example 3: Add 2g of black humic acid, 6g of potassium hydroxide and 0.8g of melamine into a beaker of 80ml of water, ultrasonically disperse for 5 minutes to form a mixed solution, place the mixed solution on a magnetic stirrer and stir for 4 hours, then set the speed of the centrifuge Centrifuge at 9000r / min for 8min, place the centrifuged product in the lower layer in a drying oven at 90°C, dry and grind it, put it into a tube furnace, and heat it from room temperature to 750°C under an argon atmosphere, with a heating rate of 10°C / min. After calcination at 750°C for 2 hours, the calcined sample was taken out, pickled with 35wt% dilute hydrochloric acid, washed with a small amount of deionization and filtered until neutral, and then dried to obtain a nitrogen-doped black humic acid-based porous carbon material.
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