Preparation method of mono-disperse silica mesoporous sphere material
A silicon dioxide, monodisperse technology, applied in the direction of silicon dioxide, silicon oxide, nanostructure manufacturing, etc., can solve the problem of not uniform particle size of spherical materials, etc.
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Embodiment 1
[0024] Such as figure 1 As shown, the 0.11g C 18 h 37 NBr(CH 3 ) 2 CH 2 CH 2 CH 2 N(CH 3 ) 3 Dissolve Br in 38g of deionized water, then add 9.2g of ethanol, and add 6.5g of 0.1mol / l sodium hydroxide to the aqueous solution of the surfactant under stirring at 80°C, and add 0.8g of tetraethoxylate to the system base silane; the system was stirred for 10 minutes, left to react at 80°C for 48 hours, filtered, washed, dried, and calcined at 550°C for 6 hours to obtain a monodisperse silica mesoporous spherical material from which organic templates and functional groups were removed.
[0025] The material was characterized by transmission electron microscope, X-ray diffraction, scanning electron microscope and nitrogen adsorption instrument. figure 2 and image 3 They are electron micrographs, X-ray diffraction patterns and nitrogen adsorption isotherms of the mesoporous material, respectively. From figure 2 It can be seen that the silica mesoporous spherical material...
Embodiment 2
[0027] Such as figure 1 As shown, 0.04g C 18 h 37 NCl(CH 3 ) 2 CH 2 CH 2 CH 2 N(CH 3 ) 3 Cl was dissolved in 38g of deionized water, then 13.8g of ethanol was added, and under stirring at 50°C, 6.5g of 0.1mol / l sodium hydroxide was added to the aqueous solution of the surfactant, and 0.15g of tetramethoxyl was added to the system base silane; the system was stirred for 10 minutes, left to react at 50°C for 48 hours, filtered, washed, dried, and calcined at 550°C for 6 hours to obtain a monodisperse silica mesoporous spherical material from which organic templates and functional groups were removed.
[0028] The material was characterized by X-ray diffraction, scanning electron microscopy, nitrogen adsorption and transmission electron microscopy. The average particle diameter of the material is 280nm, the relative standard deviation of particle diameter is 8.9%, the unit cell parameter is 4.4nm, the pore diameter is 2.5nm, and the pore wall thickness is calculated to b...
Embodiment 3
[0030] Such as figure 1 As shown, the 0.11g C 18 h 37 NBr(CH 3 ) 2 CH 2 CH 2 CH 2 N(CH 3 ) 3 Dissolve Br in 38g of deionized water, then add 13.8g of ethanol, under stirring at 80°C, add 6.5g of 0.1mol / l sodium hydroxide to the aqueous solution of the surfactant, and add 0.8g of tetraethoxylate to the system base silane; the system was stirred for 10 minutes, left to react at 80°C for 48 hours, filtered, washed, dried, and calcined at 550°C for 6 hours to obtain a monodisperse silica mesoporous spherical material from which organic templates and functional groups were removed.
[0031] The material was characterized by X-ray diffraction, scanning electron microscopy, nitrogen adsorption and transmission electron microscopy. The average particle diameter of the material is 460nm, the relative standard deviation of particle diameter is 3.9%, the unit cell parameter is 4.0nm, the pore diameter is 2.5nm, and the pore wall thickness is calculated to be 1.0nm.
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