Preparation method of transparent mesoporous silica-alumina gel monolith
A mesoporous silica-alumina, gel technology, applied in the direction of crystalline aluminosilicate zeolite, chemical instruments and methods, molecular sieve compounds, etc., can solve the problems of loss of application in the optical field, low preparation efficiency, slowness, etc., and achieve efficient drying technology. Convenience, wide application range, rich skeleton composition effect
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Embodiment approach 1
[0019]Stir and mix 0.75 g of P123, 0.188 g of aluminum nitrate, 0.091 g of water, 0.1 ml of 1M hydrochloric acid and 1.12 ml of TEOS at room temperature, and continue stirring for 60 minutes after the system is completely homogeneous, and then transfer the prepared sol into a container with a certain shape After sealing the inside, let it stand at a constant temperature of 60°C for 1 hour, then leave the container open at 60°C for 23 minutes to gel the system, then seal the container again and leave it at a constant temperature of 60°C for aging for 1 day, and finally Dry directly at 60°C in the open, and after 48 hours, a complete transparent mesoporous silica-alumina gel monolith with a container shape is obtained, and then the temperature is raised to 600°C at a rate of 2°C / min and baked for 6 hours to completely remove the surfactant Template agent, the specific surface area of mesoporous silica-alumina gel monolith is 503.0m 2 / g, the pore volume is 0.45cm 3 / g, the po...
Embodiment approach 2
[0021] Stir and mix 0.75 g of F127, 0.375 g of aluminum nitrate, 0.1 ml of 1M hydrochloric acid and 1.12 ml of TEOS at room temperature, and continue to stir for 30 minutes after the system is completely homogeneous. ℃ for 1 hour, then open the container at 60 ℃ for 8 minutes to make the system gel, then seal the container again and leave it for aging at 60 ℃ for 1 day, and finally directly at 60 ℃ Drying in the open, after 48 hours, a complete transparent mesoporous silica-alumina gel monolith with a container shape was obtained, and then the temperature was raised to 600°C at a rate of 2°C / min and calcined for 6 hours to completely remove the surfactant template agent to obtain a mesoporous silica-alumina gel monolith. The specific surface area of porous silica-alumina gel monolith is 340.28m 2 / g, the pore volume is 0.299cm 3 / g, the pore size is 3.6nm.
Embodiment approach 3
[0023] Mix 0.5g of Brij56, 0.023g of aluminum nitrate, 0.09g of water, 0.1ml of 1M hydrochloric acid and 1.12ml of TEOS at room temperature and stir for 60 minutes after the system is completely homogeneous, then transfer the prepared sol into a container with a certain shape After sealing, let it stand at a constant temperature at 60°C for 1 hour, then leave the container open at 60°C for 2 hours to make the system gel, then seal the container again and let it stand at a constant temperature at 60°C for 1 day, and finally directly Open-dried at 60°C, after 48 hours, a complete transparent mesoporous silica-alumina gel monolith with a container shape was obtained, and then heated to 600°C at a rate of 2°C / min and baked for 6 hours to completely remove the surfactant template agent, the specific surface area of the mesoporous silica-alumina gel monolith is 758.13m 2 / g, the pore volume is 0.37cm 3 / g, the pore size is 2.1nm.
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