A preparation method of crown ether modified carbon nanotube material for adsorbing uranium
A technology of carbon nanotubes and nanotubes, which is applied in the field of uranium adsorption materials, can solve problems such as insufficient recovery of uranium, and achieve high adsorption capacity and strong selectivity
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Embodiment 1
[0019] (1) Take 3g of carbon nanotube raw material, add 100mL of concentrated nitric acid and potassium permanganate mixed solution (molar ratio 1:1), stir overnight (8-12 hours), wash until neutral, and put it in a vacuum oven at 80°C Drying for 24 h, then raising the temperature to 250° C. in a tube furnace and keeping it for 2 h to obtain purified carbon nanotube raw material 1;
[0020] (2) Put 2g of carbon nanotube raw material 1 into a three-necked flask, add 10g of oxime-modified benzo-18-crown-6, then add 100mL of 40% sodium hydroxide solution, and ultrasonically disperse in an ultrasonic oscillator Stir at 50°C for 0.5 hours, filter, rinse with absolute ethanol and distilled water until neutral, and dry in a vacuum oven at 50°C for 8 h to obtain a crown ether-modified carbon nanotube material.
[0021] In order to explore the adsorption capacity and selective adsorption performance of the crown ether modified carbon nanotube material obtained in this example to uraniu...
Embodiment 2
[0026] (1) Take 3g of carbon nanotube raw material, add 100mL potassium permanganate and hydrogen peroxide mixed solution (molar ratio 1:1), stir overnight (8-12 hours), wash until neutral, and dry in a vacuum oven at 80°C 24 h, then heated up to 250° C. in a tube furnace, and kept for 2 h to obtain purified carbon nanotube raw material 1;
[0027] (2) Put 2g of carbon nanotube raw material 1 into a three-necked flask, add 20g of oxime-modified dibenzo-18-crown-6, then add 100mL of 40% sodium hydroxide solution, and ultrasonically Disperse for 1 hour, stir at 50°C, filter, rinse with absolute ethanol and distilled water until neutral, and dry in a vacuum oven at 50°C for 8 hours to obtain the crown ether modified carbon nanotube material.
[0028] In order to explore the adsorption capacity and selective adsorption performance of the crown ether modified carbon nanotube material obtained in this example to uranium, the applicant took 100ml of natural water samples from a pond ...
Embodiment 3
[0033] (1) Take 3g of carbon nanotube raw material, add 100mL of concentrated nitric acid and potassium permanganate mixed solution (molar ratio 1:1), stir overnight (8-12 hours), wash until neutral, and put it in a vacuum oven at 80°C Drying for 24 h, then raising the temperature to 250° C. in a tube furnace and keeping it for 2 h to obtain purified carbon nanotube raw material 1;
[0034] (2) Put 2g of carbon nanotube raw material 1 into a three-necked flask, add 10g of oxime-modified benzo-15-crown-5, then add 100mL of 40% sodium hydroxide solution, and ultrasonically disperse in an ultrasonic oscillator Stir at 50°C for 0.5 hours, filter, rinse with absolute ethanol and distilled water until neutral, and dry in a vacuum oven at 50°C for 8 h to obtain a crown ether-modified carbon nanotube material.
[0035] In order to explore the adsorption capacity and selective adsorption performance of the crown ether modified carbon nanotube material obtained in this example to uraniu...
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