Method for preparing pore diameter adjustable mesoporous silica nanoparticles
A mesoporous silica and nanoparticle technology, applied in the direction of silica, silicon oxide, nanotechnology, etc., can solve the problems of polymer difficulties, cumbersome operation, and high cost, and achieve simple operation, mild conditions, and low cost. Effect
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Embodiment 1
[0019] Example 1 Preparation of mesoporous silica nanoparticles with adjustable pore size
[0020] (1) Take 0.1g of cetyltrimethylammonium bromide, 50mL of deionized water, and 0.9mL of NaOH solution (2M) in a round bottom flask, stir in a water bath at 80°C for 1h; then pour into the solution Add 0.5 mL of tetraethyl orthosilicate dropwise, continue stirring for 2 h, filter, wash with a large amount of water and ethanol, and dry in vacuum to obtain mesoporous silica nanoparticles containing surfactant.
[0021] (2) Take 1 g of mesoporous silica nanoparticles containing surfactant and place them in 150 mL of absolute ethanol, then add 12 mL of concentrated hydrochloric acid (concentration 12 mol / L, the same below) to the system, and ultrasonically (40KHZ, below After 10 minutes, stir at 50°C for 12 hours, filter, wash with a large amount of water and ethanol, and dry in vacuum to obtain mesoporous silica nanoparticles.
[0022] (3) Take 0.3 g of mesoporous silica nanoparticle...
Embodiment 2
[0023] Example 2 Preparation of mesoporous silica nanoparticles with adjustable pore size
[0024] (1) Take 0.1g of cetyltrimethylammonium bromide, 50mL of deionized water, and 0.9mL of NaOH solution (2M) in a round bottom flask, stir in a water bath at 80°C for 1h; then pour into the solution Add 0.5 mL of tetraethyl orthosilicate dropwise, continue stirring for 2 h, filter, wash with a large amount of water and ethanol, and dry in vacuum to obtain mesoporous silica nanoparticles containing surfactant.
[0025] (2) Take 1 g of mesoporous silica nanoparticles containing surfactant and place them in 150 mL of absolute ethanol, then add 12 mL of concentrated hydrochloric acid to the system, ultrasonicate for 10 min, stir at 50°C for 12 h, filter, and use a large amount of Wash with water and ethanol, and dry in vacuum to obtain mesoporous silica nanoparticles.
[0026] (3) Take 0.3 g of mesoporous silica nanoparticles and place them in 0.06% NaBH 4 solution, stirred at 25°C fo...
Embodiment 3
[0027] Example 3 Preparation of mesoporous silica nanoparticles with adjustable pore size
[0028] (1) Take 0.1g of cetyltrimethylammonium bromide, 50mL of deionized water, and 0.9mL of NaOH solution (2M) in a round bottom flask, stir in a water bath at 80°C for 1h; then pour into the solution Add 0.5 mL of tetraethyl orthosilicate dropwise, continue stirring for 2 h, filter, wash with a large amount of water and ethanol, and dry in vacuum to obtain mesoporous silica nanoparticles containing surfactant.
[0029] (2) Take 1 g of mesoporous silica nanoparticles containing surfactant and place them in 150 mL of absolute ethanol, then add 12 mL of concentrated hydrochloric acid to the system, ultrasonicate for 10 min, stir at 50°C for 12 h, filter, and use a large amount of Wash with water and ethanol, and dry in vacuum to obtain mesoporous silica nanoparticles.
[0030] (3) Take 0.3 g of mesoporous silica nanoparticles and place them in 0.07% NaBH 4 solution, stirred at 4°C for...
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