Preparation method of nitrogen doping pine nut shell based porous carbon material and application

[0031] Example 1

[0032] A method for preparing a nitrogen-doped pine nut shell-based porous carbon material, the method steps are as follows:

[0033] Step 1: Low-temperature carbonization of pine nut shells: Wash the pine nut shells, grind the pine nut shells into powder with a crusher after drying, and dry, then place them in a tube furnace for carbonization at 500°C for 2 hours, and then the product Filter, wash, dry, and grind to obtain the pine nut shell-based carbon material precursor;

[0034] Step 2: Material precursor activation: The pine nut shell-based carbon material precursor is mixed with urea and potassium hydroxide in a mass ratio of 1.0:3.0:3.0, put in 30ml of deionized water, fully stirred, and dried, protected by nitrogen Calcined at 700 ℃ for 2h to obtain the crude product of nitrogen-doped modified pine nut shell-based carbon material;

[0035] Step 3: Post-processing: soak the above crude product with 0.1M HCl solution, wash with deionized water, suction filter t

[0041] Example 2

[0042] A method for preparing a nitrogen-doped pine nut shell-based porous carbon material is as follows:

[0043] Step 1: Low-temperature carbonization of pine nut shells: Wash the pine nut shells, grind the pine nut shells into powder with a breaker after drying, and dry them, then place them in a tube furnace for carbonization at 450°C for 3 hours, and then the product Filter, wash, dry, and grind to obtain the pine nut shell-based carbon material precursor;

[0044] Step 2: Material precursor activation: The obtained material precursor is mixed with semicarbazide and sodium hydroxide in a mass ratio of 1.0:3.0:6.0, put in 30ml of deionized water and fully stirred, after drying, put it under nitrogen protection for 800 Calcined at ℃ for 6h to obtain the crude product of nitrogen-doped modified pine nut shell-based carbon material;

[0045] Step 3: Post-processing: soak the above crude product with 0.1M HCl solution, wash with deionized water, suction filter to neut

[0047] Example 3

[0048] A method for preparing a nitrogen-doped pine nut shell-based porous carbon material is as follows:

[0049] Step 1: Low-temperature carbonization of pine nut shells: Wash the pine nut shells, grind the pine nut shells into powder with a crusher after drying, and dry them, then place them in a tube furnace and carbonize them at a low temperature of 500°C for 1 hour, then the product Filter, wash, dry, and grind to obtain the precursor of nitrogen-doped pine nut shell-based carbon material;

[0050] Step 2: Material precursor activation: The obtained nitrogen-doped pine nut shell-based carbon material precursor is mixed with guanidine carbonate and potassium carbonate in a mass ratio of 1.0:3.0:1.5, put into 30ml of deionized water and fully stirred, after drying It is calcined at 700°C for 4 hours under the protection of nitrogen to obtain the crude product of nitrogen-doped modified pine nut shell-based carbon material;

[0051] Step 3: Post-processing: soak th