Preparation method of mesoporous silicon nano particles

[0011] Example 1

[0012] A preparation method of mesoporous silicon nanoparticles, the steps are as follows:

[0013] Step 1: add 2g cetyltrimethylammonium bromide in 720mL water, add 7.1mL of 2mol / L sodium hydroxide solution under stirring and heat to 80°C;

[0014] Step 2: Add 15.0 mL of ethyl orthosilicate dropwise, and continue to stir for 2 hours;

[0015] Step 3: Add 5.0 mL of tetrabutyl orthosilicate dropwise, and ultrasonically disperse for 1 hour;

[0016] Step 4: Cool to room temperature, filter the white precipitate, and wash with 2L deionized water for 5 times;

[0017] Step 5: Wash 5 times with 1L, 6mol / L ethanol, and dry at 60°C;

[0018] Step 6: The white powder is calcined at 550°C for 3 hours to remove the surfactant, and the mesoporous silicon nanoparticles can be obtained.

[0019] Example 2

[0020] A preparation method of mesoporous silicon nanoparticles, the steps are as follows:

[0021] Step 1: add 2g cetyl trimethyl ammonium bromide in 720mL water, add 7.2mL of 2mol / L sodium hydroxide solution under stirring and heat to 80°C;

[0022] Step 2: Add 15.0 mL of ethyl orthosilicate dropwise, and continue to stir for 2 hours;

[0023] Step 3: Add 5.0 mL of tetrabutyl orthosilicate dropwise, and ultrasonically disperse for 1 hour;

[0024] Step 4: Cool to room temperature, filter the white precipitate, and wash with 2L deionized water for 5 times;

[0025] Step 5: Wash 5 times with 1L, 6mol / L ethanol, and dry at 60°C;

[0026] Step 6: The white powder is calcined at 550°C for 3 hours to remove the surfactant, and the mesoporous silicon nanoparticles can be obtained.

[0027] Example 3

[0028] A preparation method of mesoporous silicon nanoparticles, the steps are as follows:

[0029] Step 1: add 2g cetyltrimethylammonium bromide in 720mL water, add 7.3mL of 2mol / L sodium hydroxide solution under stirring and heat to 80°C;

[0030] Step 2: Add 15.0 mL of ethyl orthosilicate dropwise, and continue to stir for 2 hours;

[0031] Step 3: Add 5.0 mL of tetrabutyl orthosilicate dropwise, and ultrasonically disperse for 1 hour;

[0032] Step 4: Cool to room temperature, filter the white precipitate, and wash with 2L deionized water for 5 times;

[0033] Step 5: Wash 5 times with 1L, 6mol / L ethanol, and dry at 60°C;

[0034] Step 6: The white powder is calcined at 550°C for 3 hours to remove the surfactant, and the mesoporous silicon nanoparticles can be obtained.