Thickness-controllable aluminum oxide/carbon nanosheet and application thereof in heavy metal adsorption
A technology of alumina and carbon nano, which is applied in the field of nano materials, can solve the problems of serious and chromium pollution, and achieve the effect of large specific surface area, high removal rate and excellent adsorption effect
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Embodiment 1
[0018] An application of alumina / carbon nanosheets with controllable thickness in heavy metal adsorption, comprising the following steps:
[0019] (1) Add 20% phenolic resin (20 g) ethanol solution to F127 (1 g) ethanol solution (0.2 g / mL) at 35 o C and stirring at 600 rpm for 10 min. Slowly drop 0.95 g of aluminum nitrate ethanol solution (0.2 g / mL) into the above mixed solution, then add 0.77 mL of acetylacetone solution, and continue stirring for 40 min.
[0020] (2) The ammonia solution with a concentration of 4 mol / mL was added dropwise to the above solution, the pH was adjusted to 12, and the stirring was continued for 1 h; filtered and washed until neutral.
[0021] (3) Put this mixture into 100 o C oven was placed for 24 h, and then passed through a nitrogen atmosphere for 600 o C heat treatment to obtain 20wt.%Al 2 O 3 / C nanosheets. The thickness of this nanosheet is: ~25 nm.
[0022] (4) In a 30 mL glass bottle, add 20 mL of Cr(VI) solution with a concentrati...
Embodiment 2
[0024] An application of alumina / carbon nanosheets with controllable thickness in heavy metal adsorption, comprising the following steps:
[0025] (1) Add 20% phenolic resin (30 g) ethanol solution to F127 (0.5 g) ethanol solution (0.2 g / mL) at 35 o C and stirring at 600 rpm for 10 min. Slowly drop 0.38 g of aluminum nitrate ethanol solution (0.2 g / mL) into the above mixed solution, then add 0.31 mL of acetylacetone solution, and continue stirring for 40 min.
[0026] (2) Add the ammonia solution with a concentration of 4 mol / mL dropwise to the above solution, adjust the pH to 10, and continue to stir for 1 h; filter and wash until neutral.
[0027] (3) Put this mixture into 100 o C oven was placed for 24 h, and then passed through a nitrogen atmosphere for 600 o C heat treatment to obtain 10wt.%Al 2 O 3 / C nanosheets. The thickness of this nanosheet is: ~10 nm.
[0028] (4) In a 30 mL glass bottle, add 20 mL of Cr(VI) solution with a concentration of 1 mg / L, and then w...
Embodiment 3
[0030] An application of alumina / carbon nanosheets with controllable thickness in heavy metal adsorption, comprising the following steps:
[0031] (1) Add 20% phenolic resin (10 g) ethanol solution to F127 (2 g) ethanol solution (0.2 g / mL) at 35 o C and stirring at 600 rpm for 10 min. Slowly drop 0.75 g of aluminum nitrate ethanol solution (0.2 g / mL) into the above mixed solution, then add 0.61 mL of acetylacetone solution, and continue stirring for 40 min.
[0032] (2) The ammonia solution with a concentration of 4 mol / mL was added dropwise to the above solution, the pH was adjusted to 12, and the stirring was continued for 1 h; filtered and washed until neutral.
[0033] (3) Put this mixture into 100 o C oven was placed for 24 h, and then passed through a nitrogen atmosphere for 600 o C heat treatment to obtain 15wt.%Al 2 O 3 / C nanosheets. The thickness of this nanosheet is: ~20 nm.
[0034] (4) In a 30 mL glass bottle, add 20 mL of Cr(VI) solution with a concentrati...
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