Process for synthesizing mesoporous silicon oxide molecular sieve material by ultrasonic system
A technology of mesoporous silica and synthesis method, applied in chemical instruments and methods, molecular sieves and alkali exchange compounds, inorganic chemistry, etc., can solve the problems of poor emulsifying and dispersing ability of oily substances, poor dispersing ability and difficult synthesis, etc. The effect of improved performance, high synthesis efficiency, and reduced synthesis difficulty
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[0018] In Example 1, 0.5 grams of Pluronic F108 (EO 132 PO 50 EO 132 ) Was dissolved in 30 g of 2M hydrochloric acid aqueous solution. After the surfactant was dissolved, 2.08 g of TEOS was added to the solution. The solution is immediately placed in an ultrasonic bath (with a constant temperature water tank) and ultrasonicated at 40°C for 2 to 4 hours. After the sol and gel chemical process and the collaborative self-assembly process, a three-dimensional highly ordered organic-inorganic composite material is formed. After the three-dimensional material is hydrothermally aged at 100°C for 12 hours, it is finally calcined at 550°C for 5 hours to remove the surfactant. Analysis tests such as PXRD, BET and TEM prove that the film material is a high-quality silicon oxide material with a three-dimensional cubic structure (space group is Im-3m). The specific surface area of the material is 620m 2 / g, the pore volume is 0.9cm 3 / g, the pore size is 5.2 nanometers.
Example Embodiment
[0019] In Example 2, 0.8 grams of Pluronic P103 (EO 17 PO 56 EO 17 ) Was dissolved in 30 g of 2M hydrochloric acid aqueous solution. After the surfactant was dissolved, 2.08 g of TEOS was added to the solution. The solution is immediately placed in an ultrasonic bath (with a constant temperature water tank) and ultrasonicated at 40°C for 2 to 4 hours. After the sol and gel chemical process and the collaborative self-assembly process, a two-dimensional highly ordered organic-inorganic composite material is formed. After the two-dimensional material is hydrothermally aged at 100°C for 12 hours, it is finally calcined at 550°C for 5 hours to remove the surfactant. Analysis and tests such as PXRD, BET and TEM prove that the film material is a high-quality two-dimensional hexagonal silicon oxide material. The specific surface area of the material is 720m 2 / g, the pore volume is 1.1cm 3 / g, the pore size is 6.7 nanometers.
Example Embodiment
[0020] In Example 3, 0.9 grams of Pluronic P103 (EO 17 PO 56 EO 17 ) Was dissolved in 35 g of 2M hydrochloric acid aqueous solution. After the surfactant was dissolved, 2.08 g of TEOS was added to the solution. The solution is immediately placed in an ultrasonic bath (with a constant temperature water tank) and ultrasonicated at 45°C for 2 to 4 hours. After the sol and gel chemical process and the collaborative self-assembly process, a two-dimensional highly ordered organic-inorganic composite material is formed. After the two-dimensional material is hydrothermally aged at 100°C for 12 hours, it is finally calcined at 550°C for 5 hours to remove the surfactant. Analysis tests such as PXRD, BET and TEM prove that the film material is a high-quality two-dimensional hexagonal structure (space group p6mm) silicon oxide material. The specific surface area of the material is 730m 2 / g, the pore volume is 1.0cm 3 / g, the pore size is 6.6 nanometers.
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