A kind of preparation method of high-efficiency photothermal conversion carbon dot-based foam
A technology of light-to-heat conversion and carbon dots, which is applied in the preparation/purification of carbon, chemical instruments and methods, nano-carbon, etc., can solve the problems of aggravating global warming, shortage of clean water resources, damage, etc., and achieve simple purification methods And efficient, the method is safe and efficient, and the effect of high-efficiency light-to-heat conversion
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Embodiment 1
[0026] 1. Weigh 0.25g of o-phenylenediamine and 0.5g of phenol, put them in a 20mL crucible, put them in a muffle furnace, and heat up to 200°C with a heating rate of 10°C min -1 , heat preservation for 1 hour and natural cooling to obtain a carbon dot-based foam solid.
[0027] 2. Take out the solution obtained in step 1 and grind it evenly, place it in distilled water 100 times the volume of the solution after the reaction, and put it into a high-speed centrifuge after ultrasonication for 1 hour at a speed of 5000 rpm for 20 minutes.
[0028] 3. Remove the precipitate from the lower layer and dry it.
[0029] 4. Disperse the solid powder obtained in step 3 in ethanol, drop it on a 2*2cm square nickel foam, and conduct a seawater desalination test to obtain a carbon dot-based foam with high-efficiency light-to-heat conversion, that is, carbon dot-nitrogen Doped carbon composite material, through effective regulation, its light absorption range covers 250-2500nm, which meets ...
Embodiment 2
[0031] 1. Weigh 0.5g of aniline and 1.5g of resorcinol, put them in a 20mL crucible, put them in a muffle furnace, and heat up to 400°C with a heating rate of 1°C min -1 , heat preservation for 2 hours and natural cooling to obtain a carbon dot-based foam solid.
[0032] 2. Take out the solution obtained in step 1 and grind it evenly, place it in distilled water 500 times the volume of the solution after the reaction, and put it into a high-speed centrifuge after ultrasonication for 2 hours at a speed of 10,000 rpm for 20 minutes.
[0033] 3. Remove the precipitate from the lower layer and dry it.
[0034] 4. Disperse the solid powder obtained in step 3 in ethanol, drop it on a 2*2cm square nickel foam, and conduct a seawater desalination test to obtain a carbon dot-based foam with high-efficiency light-to-heat conversion, that is, carbon dot-nitrogen Doped carbon composite material, through effective regulation, its light absorption range covers 250-2500nm, which meets the r...
Embodiment 3
[0036] 1. Weigh 1.0g of naphthalene diamine and 1.5g of phloroglucinol, put them in a 20mL crucible, put them in a muffle furnace, and heat up to 150°C with a heating rate of 30°C min -1 , heat preservation for 6 hours and natural cooling to obtain carbon dot-based foam solids.
[0037]2. Take out the solution obtained in step 1 and grind it evenly, place it in distilled water 50 times the volume of the solution after the reaction, and put it into a high-speed centrifuge after ultrasonication for 1 hour at a speed of 6000 rpm for 20 minutes.
[0038] 3. Remove the precipitate from the lower layer and dry it.
[0039] 4. Disperse the solid powder obtained in step 3 in ethanol, drop it on a 2*2cm square nickel foam, and conduct a seawater desalination test to obtain a carbon dot-based foam with high-efficiency light-to-heat conversion, that is, carbon dot-nitrogen Doped carbon composite material, through effective regulation, its light absorption range covers 250-2500nm, which ...
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