Preparation method of silicon oxide nano pore molecular sieve film
A technology of nanopores and molecular sieves, applied in molecular sieve compounds, chemical instruments and methods, inorganic chemistry, etc., can solve problems such as complex preparation methods, low structural order, and influence on the scope of application
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Embodiment 1
[0010] A certain mass ratio of Pluronics P123 (EO 20 PO 70 EO 20 ) and Brij35 (C 12 EO 23 ) was dissolved in absolute ethanol, and TEOS, H 2 O, 2M HCl, and ethanol are mixed according to a certain ratio to prepare SiO 2 Sol. After two hours of stirring respectively, they were mixed, and the mixture was stirred for one hour, then transferred to a petri dish, and dried to form a film. After 2-5 days, the film was taken out and heated in water at 100°C for one day. Then place the product in a muffle furnace and heat it up to 550°C, and bake it at this temperature for 5 hours; or reflux in ethanol to remove the surfactant. The mass ratio of the mother liquor raw materials in the petri dish is as follows: P123: Brij35: TEOS: 2MCl: H 2 O: ethanol = 1.0:0.3:2.08:0.1:0.9:15. Analysis tests such as PXRD, BET and TEM prove that the film material is a high-quality silicon oxide film material with a two-dimensional hexagonal structure (space group p6mm). The specific surface are...
Embodiment 2
[0012] A certain mass ratio of PluronicsF127 (EO 106 PO 70 EO 106 ) and Brij78 (C 16 EO 20 ) was dissolved in absolute ethanol, and TMOS, H 2 O, 2M HCl, and ethanol are mixed according to a certain ratio to prepare SiO 2 Sol. After two hours of stirring respectively, they were mixed, and the mixture was stirred for one hour, then transferred to a petri dish, and dried to form a film. After 2-5 days, the film was taken out and heated in water at 100°C for one day. Then put the product in a muffle furnace and bake at 550°C for 5.5 hours; or reflux in ethanol to remove the surfactant. The mass ratio of the mother liquor raw materials in the petri dish is as follows: F127: Brij78: TMOS: 2MCl: H 2 O: ethanol = 0.7:0.1:1.52:0.1:0.9:15. Analysis tests such as PXRD, BET and TEM prove that the film material is a silicon oxide film material with a high-quality three-dimensional cubic structure (space group is Im-3m). The specific surface area of the material is 620m 2 / g, t...
Embodiment 3
[0014] A certain mass ratio of Polyglycol B50-6600 (EO 39 BO 47 EO 39 ) and Brij35 were dissolved in absolute ethanol, and TEOS, H 2 O, 2M HCl, and ethanol are mixed according to a certain ratio to prepare SiO 2 Sol. After two hours of stirring respectively, they were mixed, and the mixture was stirred for one hour, then transferred to a petri dish, and dried to form a film. After 2-5 days, the film was taken out and heated in water at 100°C for one day. Then put the product in a muffle furnace and bake at 550°C for 5 hours; or reflux in ethanol to remove the surfactant. The mass ratio of the mother liquor raw materials in the petri dish is as follows: B50-6600: Brij35: TEOS: 2MCl: H 2 O: ethanol = 0.7:0.3:2.08:0.1:0.9:15. Analysis tests such as PXRD, BET and TEM prove that the film material is a silicon oxide film material with a high-quality three-dimensional cubic structure (space group 1m-3m). The specific surface area of the material is 650m 2 / g, the pore volu...
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