Method for preparing nitrogen-auto-doped porous graphene by utilizing porous soybean hulls
A porous graphene and self-doping technology, which is applied in graphene, chemical instruments and methods, inorganic chemistry, etc., can solve the problems of high cost of graphene acquisition, life-threatening safety, and harm to human health, etc., and is suitable for large-scale The effect of production, simplification of production process, and cost saving of raw materials
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Embodiment 1
[0039] 1) Wash fresh soybean shells with water, place them in a common drying oven, and dry them at 100° C. to obtain curly dried soybean shell samples;
[0040] 2) Put the prepared soybean shell sample in step 1) in a multifunctional pulverizer, and pulverize it for 3 minutes to obtain the powder of soybean shell material;
[0041] 3) Weigh 5g of soybean shell powder and 15g of KOH solid in step 2) into a 250ml beaker, add 100g of water, stir in a constant temperature water bath at 80°C for 4h, take it out and dry it in a normal drying oven at 100°C for 24h;
[0042] 4) Place the consolidated block obtained in step 3) in a tube furnace, and raise the temperature to 800°C under an Ar gas protective atmosphere, with a heating rate of 5°C·min -1 , keep warm for 1h;
[0043] 5) Grind the product obtained in step 4) manually, and place it in 200ml of 0.3MH 2 SO 4 Pickle in a constant temperature water bath at 80°C for 6 hours in the solution, filter with suction, and wash with ...
Embodiment 2
[0055] 1) Wash fresh broad bean shells with water, place them in a common drying oven, and dry them at 80°C to obtain curly dried broad bean shell samples;
[0056] 2) Place the broad bean shell sample prepared in step 1) in a multifunctional pulverizer, and pulverize it for 4 minutes to obtain the powder of the bean shell material;
[0057] 3) Weigh 5g of the broad bean shell powder and 10g of KOH solid in step 2) and place it in a 250ml beaker, add 150g of water, stir in a constant temperature water bath at 90°C for 6h, take it out and dry it in an ordinary drying oven at 120°C for 48h;
[0058] 4) the consolidated block obtained in step 3) is placed in a tube furnace, and the 2 The temperature was raised to 550°C under a gas-protected atmosphere, and the heating rate was 6°C·min -1 , keep warm for 1.5h;
[0059] 5) After manually grinding the product obtained in step 4), place it in 250ml of 0.4MH 2 SO 4 Pickle in a constant temperature water bath at 80°C for 8 hours in...
Embodiment 3
[0063] 1) Wash fresh mung bean shells with water, place them in a common drying oven, and dry them at 80° C. to obtain curly dried mung bean shell samples;
[0064] 2) Place the prepared mung bean shell sample in step 1) in a multifunctional pulverizer, and pulverize it for 3 minutes to obtain the powder of the mung bean shell material;
[0065] 3) Weigh 5g of the mung bean shell powder and 15g of KOH solid in step 2) and place it in a 250ml beaker, add 150g of water, stir in a constant temperature water bath at 70°C for 3h, take it out and dry it in an ordinary drying oven at 90°C for 20h;
[0066] 4) Put the consolidated block obtained in step 3) in a tube furnace, and raise the temperature to 600°C under the protective atmosphere of Ar gas, and the heating rate is 5°C·min -1 , keep warm for 2h;
[0067] 5) After manually grinding the product obtained in step 4), place it in 250ml of 0.5MH 2 SO 4 Pickling in a constant temperature water bath at 70°C for 7 hours in the sol...
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