Preparation method of nitrogen-doped porous carbon material

[0030] S1. Weighing 1 part by weight of tripotassium EDTA and 1 part by weight of sodium chloroacetate;

[0031] S2, the two are ground in a mortar for 15 minutes;

[0032] S3. Put it in a tube furnace, heat it up to 700°C at 3°C / min under the protection of helium, and carbonize it at a constant temperature for 1h; after natural cooling, add the product to 0.2mol L -1 The HCl solution was stirred for 10 min to remove impurity ions K + and Na + ; and then washed with distilled water and ethanol to pH = 7, and dried to obtain a nitrogen-doped porous carbon material.

[0034] S1. Weigh 4 parts by weight of tripotassium EDTA and 1 part by weight of sodium chloroacetate;

[0035] S2, the two are ground in a mortar for 15 minutes;

[0036] S3. Put it in a tube furnace, heat it up to 500°C at 3°C / min under the protection of helium, and carbonize it at a constant temperature for 1h; after cooling, add the product to 0.2mol L -1 The HCl solution was stirred for 10 min to remove impurity ions K + and Na + ; and then washed with distilled water and ethanol to pH = 7, and dried to obtain a nitrogen-doped porous carbon material.

[0038] S1. Weigh 4 parts by weight of tripotassium EDTA and 1 part by weight of sodium chloroacetate;

[0039] S2, the two are ground in a mortar for 15 minutes;

[0040] S3, it is placed in the tube furnace, in N 2 Under protection, the temperature was raised to 600 °C at 3 °C / min, and then carbonized at a constant temperature for 1 h; after cooling, the product was added to 0.2 mol L -1 The HCl solution was stirred for 10 min to remove impurity ions K + and Na + ; and then washed with distilled water and ethanol to pH = 7, and dried to obtain a nitrogen-doped porous carbon material.