Method for preparing novel mesoporous silica nano balls
A nanocrystal, a certain amount of technology, applied in the direction of silicon dioxide, silicon oxide, chemical instruments and methods, etc., to achieve the effect of easy biocompatibility, simple operation and good repeatability
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Embodiment 1
[0019] (1) Use a graduated cylinder to measure 40 mL of diethyl ether (CH 3 OCH 3 ) and 8mLH 2 O was poured into a 100mL sealed round-bottomed flask with a stopper, and magnetically stirred at room temperature to mix evenly;
[0020] (2) Then slowly add 1mL ammonia water (NH 4 OH) and 2mL tetraethyl orthosilicate (TEOS), continue stirring for 3 hours;
[0021] (3) Gradually slowly add 2 mL of TEOS and 1.0 g of cetyltrimethylammonium bromide (CTAB) to the above solution, and slowly stir and react for 5 hours;
[0022] (4) Put the mixed solution of the previous step into a high-pressure reactor, put it in an oven at 120° C., and react for 20 hours;
[0023] (5) Take out the mixed solution and wash it repeatedly with distilled water and ethanol, then centrifuge to remove the lower layer of precipitate, and finally place the precipitate in
[0024] Dry in an oven at 60°C to obtain porous SiO 2 nanospheres.
Embodiment 2
[0026] Implementation process step is except following difference, and other is all identical with embodiment 1
[0027] In step (2), slowly add 1 mL of ammonia water (NH 4 OH) and 2mL tetraethyl orthosilicate (TEOS), continue stirring for 1 hour;
[0028] In step (3), slowly add 2 mL of TEOS and 0.8 g of cetyltrimethylammonium bromide (CTAB) to the solution gradually, and slowly stir for 3 hours to react;
[0029] The obtained result is substantially similar to Example 1, except that SiO 2 The diameter of the nanospheres is slightly smaller than that of Example 1.
Embodiment 3
[0031] Implementation process step is except following difference, and other is all identical with embodiment 1
[0032] In step (2), slowly add 1 mL of ammonia water (NH 4 OH) and 1 mL tetraethyl orthosilicate (TEOS), continue to stir and react for 2 hours;
[0033] In step (3), slowly add 1 mL of TEOS and 1.0 g of cetyltrimethylammonium bromide (CTAB) to the solution gradually, and slowly stir for 5 hours;
[0034] The result is substantially similar to Example 1, except that SiO 2 The yield of nanospheres decreased somewhat, and the resulting SiO 2 Nanoballs are a little on the small side.
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