Preparation method of mesoporous silica microspheres with pores formed by multi-walled carbon nanotubes
A technology of multi-walled carbon nanotubes and mesoporous silica, applied in the field of preparation of mesoporous silica microspheres, can solve the problems of uneven pore size of mesoporous silica microspheres, unstable micelles, etc. Uniform pore size, high synthesis yield and mild reaction conditions
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Embodiment 1
[0028] (1) Weigh 100mg carboxylated multi-walled carbon nanotubes, 600mg (3-aminopropyl) trimethoxysilane and 150mL ultrapure water respectively in a 250mL beaker, stir magnetically for 10min, filter under reduced pressure to obtain a black solid, and use 250 mL of ethanol was fully washed to remove unreacted (3-aminopropyl)trimethoxysilane, dried in vacuo, and weighed to obtain 558 mg.
[0029] (2) Weigh 240 mg of the silicon source precursor prepared in step 1, 300 mg of tetraethyl orthosilicate, 27 mg of triethylamine and 120 mL of ethanol in a 250 mL single-necked round bottom flask, stir magnetically for 20 min, and heat the round bottom flask to 80 °C , continued to react for 12 hours, cooled to room temperature, and filtered under reduced pressure to obtain a gray solid, which was washed with 150 mL of ethanol to remove unreacted ethyl orthosilicate, dried in vacuo, and weighed to obtain 445 mg.
[0030] (3) Weigh 120 mg of the carboxylated multi-walled carbon nanotube-...
Embodiment 2
[0032] The influence of different porogenic materials on the product:
[0033] (1) Weigh 100mg of different porogenic materials, 600mg (3-aminopropyl)trimethoxysilane and 150mL ultrapure water in a 250mL beaker, stir magnetically for 10min, filter under reduced pressure to obtain a black solid, and wash it thoroughly with 250mL ethanol washing to remove unreacted (3-aminopropyl)trimethoxysilane, and vacuum drying to obtain a silicon source precursor.
[0034] (2) Weigh 240 mg of the silicon source precursor prepared in step 1, 300 mg of tetraethyl orthosilicate, 27 mg of triethylamine and 120 mL of ethanol in a 250 mL single-necked round bottom flask, stir magnetically for 20 min, and heat the round bottom flask to 80 °C , continued to react for 12 hours, cooled to room temperature, filtered under reduced pressure to obtain a gray solid, and washed with 150 mL of ethanol to remove unreacted ethyl orthosilicate, and dried in vacuum to obtain carboxylated multi-walled carbon nan...
Embodiment 3
[0040] The influence of different temperature on the product:
[0041](1) Weigh 100mg carboxylated multi-walled carbon nanotubes, 600mg (3-aminopropyl) trimethoxysilane and 150mL ultrapure water respectively in a 250mL beaker, stir magnetically for 10min, filter under reduced pressure to obtain a black solid, and use 250 mL of ethanol was fully washed to remove unreacted (3-aminopropyl)trimethoxysilane, and vacuum-dried to obtain a silicon source precursor.
[0042] (2) Weigh 240 mg of the silicon source precursor prepared in step 1, 300 mg of tetraethyl orthosilicate, 27 mg of triethylamine and 120 mL of ethanol in a 250 mL single-necked round bottom flask, stir magnetically for 20 min, and heat the round bottom flask to 80 °C , continue to react for 12 hours, cool to room temperature, filter under reduced pressure to obtain a gray solid, and fully wash with 150mL ethanol to remove unreacted ethyl orthosilicate, and dry in vacuo to obtain carboxylated multi-walled carbon nano...
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