Preparing method for mesoporous silicon dioxide material
A mesoporous silica and mesoporous structure technology, applied in the direction of silica, silicon oxide, etc., to achieve the effect of reducing production costs and reducing corrosion of production equipment
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Embodiment 1
[0024] According to the ratio: 0.2CTAB: 1TEOS: 0.5NaNO 3 : 100H 2 O Add 7.3 g of CTAB, 180 mL of deionized water and 4.25 g of NaNO to the reactor in sequence 3 , stirred until completely dissolved into a transparent solution, at this time the viscosity of the solution is very high. 20.8 g of TEOS was added to the solution, pH = 6, left to react at room temperature for 6 days, and a white mixture was obtained. Filter, wash and dry to obtain a white product. After the product is dried, it is baked at 540°C for 6 hours to remove the templating agent. The XRD pattern of the sample after roasting is shown in figure 1 , figure 1 It is the powder X-ray diffraction pattern (XRD) of embodiment 1, and this is consistent with the mesoporous material of the reported wormhole. The d value of the mesoporous structure was calculated to be 4.93 nm. The nitrogen adsorption isotherm and pore size distribution of the samples after roasting are shown in figure 2 , figure 2 Nitrogen ad...
Embodiment 2
[0026] According to the ratio: 0.2CTAB: 1TEOS: 0.15NaNO 3 : 100H 2 O 7.3 g of CTAB, 180 mL of deionized water and 1.27 g of NaNO were sequentially added to the reactor 3 , stirred until completely dissolved into a viscous transparent solution. 20.8 g of TEOS was added to this solution, pH = 6, stirred at room temperature for 6 days, and a white mixture was obtained. Filter, wash and dry to obtain a white product. The nitrogen adsorption isotherm and pore size distribution of the product after roasting are shown in image 3 . The most visible pore size is 3.0nm, and the specific surface area is 541m 2 / g.
Embodiment 3
[0028] According to the ratio: 0.2CTAB: 1TEOS: 0.5Al(NO 3 ) 3 : 100H 2 O sequentially add 7.3g CTAB, 180mL deionized water and 18.8g Al(NO 3 ) 3 , stirred until completely dissolved into a transparent solution, at this time the viscosity of the solution is very high. 20.8 g of TEOS was added to this solution, and the reaction was allowed to stand at room temperature for 3 days to obtain a white mixture. Filter, wash and dry to obtain a white product. The XRD pattern of the product before and after roasting is shown in Figure 4 , (a) is the XRD figure of the unroasted product, and (b) is the XRD figure of the product after roasting.
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