Method for preparing multi-element-doped carbon materials by utilizing Chinese chives
A leek, co-doping technology, applied in the fields of nanotechnology, nanocarbon, nanotechnology, etc. for materials and surface science, to achieve the effects of simple operation, uniform size, and low equipment requirements
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Embodiment 1
[0028] Chop fresh leek leaves, wash them, and dry them. Weigh 6 grams of dried leek leaves, 20 ml of concentrated ammonia water with a concentration of 25% and 40 ml of ultrapure water, add them to a hydrothermal kettle, and heat them in an oven at 220 ° C. After 12 hours of hydrothermal reaction, take out the hydrothermal reaction kettle, cool it down to 25°C naturally, pour out the reaction solution in the hydrothermal reaction kettle; centrifuge at a low speed of 3000r / min for 30 minutes, collect the supernatant Then continue to use 16000r / min high-speed centrifugation for 5 minutes, collect the supernatant again; use 0.45 micron, 0.22 micron, 0.1 micron mixed cellulose lipid (water system) microporous membranes to filter and purify in turn to obtain nitrogen , sulfur and phosphorus co-doped carbon quantum dot solution. The carbon quantum dot solution was sampled and placed in a refrigerator at 4°C for low temperature storage. After one year of observation, it was found tha...
Embodiment 2
[0033] Chop fresh leek leaves, wash them, and dry them. Weigh 6 grams of dried leek leaves, 25 ml of concentrated ammonia water with a concentration of 28% and 45 ml of ultrapure water, add them to a hydrothermal kettle, and heat them in an oven at 150°C Hydrothermal for 48 hours, after the hydrothermal reaction is over, take out the hydrothermal kettle, cool it down to 20°C naturally, then pour out the reaction solution in the hydrothermal reaction kettle; centrifuge at a low speed of 3500r / min for 25 minutes, collect the supernatant Then continue to use 14000r / min high-speed centrifugation for 8 minutes, and collect the supernatant again; use 0.45 micron, 0.22 micron, 0.1 micron mixed cellulose lipid (water system) microporous membranes to filter and purify successively to obtain nitrogen , sulfur and phosphorus co-doped carbon quantum dot solution. The carbon quantum dot solution was sampled and placed in a refrigerator at 4°C for low temperature storage. After one year of ...
Embodiment 3
[0038] Fresh leek leaves are chopped, washed, and dried. Weigh 6 grams of dried leek leaves, 25 ml of concentrated ammonia water with a concentration of 27% and 45 ml of ultrapure water, add them to a hydrothermal kettle, and heat them in an oven at 200 ° C. Hydrothermal for 24 hours, after the hydrothermal reaction is over, take out the hydrothermal kettle, cool it naturally at 23°C, then pour out the reaction liquid in the hydrothermal reaction kettle; centrifuge at a low speed of 4000r / min for 15 minutes, and collect the supernatant , and then continue to use 12000r / min high-speed centrifugation for 15 minutes, and collect the supernatant again; successively use 0.45 micron, 0.22 micron, 0.1 micron mixed cellulose resin (water system) microporous filter membranes to filter and purify to obtain nitrogen, Sulfur and phosphorus co-doped carbon quantum dot solution. The carbon quantum dot solution was sampled and placed in a refrigerator at 4°C for low temperature storage. Afte...
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