A kind of micron particle mesoporous silica and its preparation and application
A technology of mesoporous silica and micro-particles, which is applied in the research field of nano-porous materials, can solve the problem that mesoporous silica cannot self-assemble to form micro-particles.
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Embodiment 1
[0032] Add 200ml of deionized water to the flask placed in a water bath at 30°C, then add 20ml of glacial acetic acid, then add 5.5g of P123 and 7ml of n-butanol. Stir thoroughly until P123 is completely dissolved to form a transparent and colorless solution, then add 1g of chitosan, continue to stir well until the chitosan is completely dissolved, then add 13ml of ethyl orthosilicate and continue stirring at 350rpm for 20 hours. After the stirring was completed, the flask was placed in an oven at 150°C and allowed to stand for 20 hours. After that, the precipitate is obtained by centrifugation, washed with deionized water and absolute ethanol three times each, dried in an oven, and then calcined at 600° C. for 5 hours to obtain micro-particle mesoporous silica.
[0033] The prepared micron mesoporous silica can self-assemble into micron particles, the micron particles are close to spherical, and the particle size is about 4-6 μm.
Embodiment 2
[0035] Add 200ml of deionized water to the flask placed in a 70°C water bath, then add 20ml of glacial acetic acid, then add 2g of P123 and 7ml of n-butanol. Stir thoroughly until P123 is completely dissolved to form a transparent and colorless solution, then add 2g of chitosan, continue to stir well until the chitosan is completely dissolved, then add 13ml of ethyl orthosilicate, and continue stirring at 500rpm for 36 hours. After the stirring was completed, the flask was placed in an oven at 150°C and allowed to stand for 96 hours. After that, the precipitate was obtained by centrifugation, washed with deionized water and absolute ethanol three times, placed in an oven to dry, and then calcined at 600°C for 5 hours. Obtain micro-particle mesoporous silica.
[0036] The prepared micron mesoporous silica can self-assemble into micron particles, the micron particles are close to spherical, and the particle size is about 4-6 μm.
Embodiment 3
[0038] Add 200ml of deionized water to the flask placed in a 55°C water bath, then add 20ml of glacial acetic acid, then add 10g of P123 and 7ml of n-butanol. Stir thoroughly until P123 is completely dissolved to form a transparent and colorless solution, then add 10g of chitosan, continue to stir well until the chitosan is completely dissolved, then add 13ml of ethyl orthosilicate, and continue stirring at 1000rpm for 72 hours. After the stirring was completed, the flask was placed in an oven at 100°C and allowed to stand for 72 hours. After that, the precipitate was obtained by centrifugation, washed with deionized water and absolute ethanol three times, placed in an oven to dry, and then calcined at 600°C for 5 hours. Obtain micro-particle mesoporous silica.
[0039] The prepared micron mesoporous silica can self-assemble into micron particles, the micron particles are close to spherical, and the particle size is about 4-6 μm.
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