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 of TEOS, difficult synthesis, etc. Achieve performance improvement, shorten synthesis time, and reduce synthesis difficulty
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Embodiment 1
[0018] Embodiment 1, 0.5 gram of Pluronic F108 (EO 132 PO 50 EO 132 ) was dissolved in 30 grams of 2M hydrochloric acid aqueous solution, and after the surfactant was dissolved, 2.08 grams of TEOS was added to the solution. The solution is immediately placed in an ultrasonic tank (with a constant temperature water tank), ultrasonicated at 40°C for 2 to 4 hours, and undergoes a sol-gel chemical process and a cooperative self-assembly process to form a three-dimensional highly ordered organic-inorganic composite material. 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 silicon oxide 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, the pore volume is 0.9cm 3 / g, the pore size is 5.2 nm.
Embodiment 2
[0019] Embodiment 2, 0.8 gram of Pluronic P103 (EO 17 PO 56 EO 17 ) was dissolved in 30 grams of 2M hydrochloric acid aqueous solution, and after the surfactant was dissolved, 2.08 grams of TEOS was added to the solution. The solution is immediately placed in an ultrasonic tank (with a constant temperature water tank), and ultrasonicated at 40°C for 2 to 4 hours. After the chemical process of sol and gel and the process of cooperative self-assembly, a two-dimensional highly ordered organic-inorganic composite material is formed. The two-dimensional material was hydrothermally aged at 100° C. for 12 hours, and 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 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 nm.
Embodiment 3
[0020] Example 3, 0.9 g of Pluronic P103 (EO17PO56EO17) was dissolved in 35 g of 2M hydrochloric acid aqueous solution, and after the surfactant was dissolved, 2.08 g of TEOS was added into the solution. The solution is immediately placed in an ultrasonic tank (with a constant temperature water tank), and ultrasonically operated at 45°C for 2 to 4 hours. After the sol, gel chemical process and cooperative self-assembly process, a two-dimensional highly ordered organic-inorganic composite material is formed. The two-dimensional material was hydrothermally aged at 100° C. for 12 hours, and 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 two-dimensional hexagonal structure (space group p6mm). 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 nm.
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