Preparation method of multi-heteroatom doped mesoporous carbon based on vegetable protein
A plant protein and heteroatom technology, applied in the field of preparation of multi-heteroatom-doped mesoporous carbon, to achieve the effect of strong operability, high specific surface area, and simple operation method
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[0024] A method for preparing a plant protein-based polyatomic doped mesoporous carbon material, the steps of which are:
[0025] (1) Put 50-300g of dry soybeans in a 1000mL beaker and soak them in deionized water for more than 12 hours;
[0026] (2) Take out the wet soybeans soaked in (1) above, dry the surface, put 100-500g of wet soybeans into a soymilk machine, add 1100mL of deionized water, grind the soybean milk, and filter out the bean dregs;
[0027] (3) Add a 0.001M---saturated metal salt solution to the soybean milk obtained in (2) above to obtain a soybean protein gel doped with metal ions;
[0028] (4) Dry the soy protein gel doped with metal ions in (3) above at 50-90°C for 10h-72h;
[0029] (5) Place the dried solid in the above (4) in a quartz boat, and in a nitrogen atmosphere, the carbonization temperature is 700°C-1400°C, the carbonization time is 1-10h, and the heating rate is 2°C / min. black solid product;
[0030] (6) Centrifuge and wash the black produc...
Embodiment 1
[0037] Example 1: Take 70g of dry soybeans and put them into a 1000mL beaker, add deionized water, and soak for 14h. Take out the soaked soybeans, dry them, weigh 135g and put them into a soybean milk machine, add 1100mL of deionized water to prepare soybean milk. Strain out the okara. Add 50mL aqueous solution of 1.4M ferrous sulfate to the prepared soybean milk, mix well to obtain soybean protein gel. Dry at 80°C for 48h. The dried soy protein gel was put into a quartz boat, and carbonized at 850° C. for 6 hours under a nitrogen atmosphere with a heating rate of 2° C. / min to obtain a black product. The obtained black product was repeatedly centrifuged and washed 7 times with a mixture of deionized water and ethanol at 5000 rpm for 5 min, dried at 80°C for 8 h, and then ground to obtain polyheteroatom-doped mesoporous carbon.
[0038] The multi-heteroatom-doped mesoporous carbon material obtained in this example has a heteroatom doping amount of 14.21at.%, and a BET specif...
Embodiment 2
[0039]Example 2: Take 70g of dry soybeans and put them into a 1000mL beaker, add deionized water, and soak for 14h. Take out the soaked soybeans, dry them, weigh 135g and put them into a soybean milk machine, add 1100mL of deionized water to prepare soybean milk. Strain out the okara. Add 50mL aqueous solution of 1.4M ferrous sulfate to the prepared soybean milk, mix well to obtain soybean protein gel. Dry at 80°C for 48h. The dried soy protein gel was put into a quartz boat, and carbonized at 750° C. for 6 hours under a nitrogen atmosphere with a heating rate of 2° C. / min to obtain a black product. The obtained black product was repeatedly centrifuged and washed 7 times with a mixture of deionized water and ethanol at 5000 rpm for 5 min, baked at 80°C for 8 h, and then ground to obtain polyheteroatom-doped mesoporous carbon.
[0040] The multi-heteroatom-doped mesoporous carbon material obtained in this example has a heteroatom doping amount of 17.43at.%, and a BET specifi...
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