A preparing method of nanometer flake-shaped mesoporous alumina
A technology of mesoporous alumina and nano flakes, applied in the direction of alumina/aluminum hydroxide, nanotechnology, etc., can solve the problems of reports, no synthesis literature of nano flake mesoporous alumina, etc., and achieve the effect of simple process flow
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Embodiment 1
[0021] Dissolve 2.4g of crystalline aluminum trichloride in 30mL of water, then add 5mL of triethanolamine, stir at room temperature for 4h, then slowly add 20mL of 1M ethylenediamine dropwise, continue to stir at room temperature for 30min, then transfer to an 80mL hydrothermal kettle, Hydrothermal treatment in an oven at 150°C for 36 hours, then take it out and cool it to room temperature, filter it with suction, wash it with water three times, dry it in an oven at 120°C, and then bake it in a muffle furnace at 550°C to obtain nano-flaky alumina. The flaky alumina has a sheet thickness of 5-10nm, a width of 0.2-0.5μm, and a specific surface area of 220cm 2 g -1 , the pore volume is 0.5cm 3 g -1 , with an average pore size of 3.0 nm.
Embodiment 2
[0023] Dissolve 3.0g of aluminum nitrate nonahydrate in 20mL of water, then add 6mL of triethanolamine, stir at room temperature for 4h, then slowly add 15mL of 2M ethylenediamine dropwise, continue to stir at room temperature for 30min, then transfer to an 80mL hydrothermal kettle, and place at 180 Hydrothermal treatment in an oven at ℃ for 15 hours, then take it out and cool it to room temperature, filter it with suction, wash it with water three times, dry it in an oven at 120℃, and then bake it in a muffle furnace at 800℃ to obtain nano-flaky alumina. The flaky alumina has a sheet thickness of 10-20nm, a width of 0.1-0.3μm, and a specific surface area of 340cm 2 g -1 , the pore volume is 1.2cm 3 g -1 , with an average pore size of 12nm.
Embodiment 3
[0025] Dissolve 2.7g of aluminum sulfate in 35mL of water, then add 8mL of triethanolamine, stir at room temperature for 4h, then slowly add 8mL of 2M ethylenediamine dropwise, continue stirring for 30min at room temperature, then transfer to an 80mL hydrothermal kettle, and place in an oven at 200°C Heat treatment in neutral water for 12 hours, then take it out and cool it to room temperature, filter it with suction, wash it with water three times, dry it in an oven at 120°C, and then bake it in a muffle furnace at 400°C to obtain nano-flaky alumina. The flaky alumina has a sheet thickness of 10-30nm, a width of 0.1-0.5μm, and a specific surface area of 288cm 2 g -1 , the pore volume is 0.95cm 3 g -1 , with an average pore size of 25nm.
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