Preparation method of silicate nano tube for adsorbing and separating gas
A gas adsorption and silicate technology, applied in chemical instruments and methods, silicon compounds, inorganic chemistry, etc., can solve the problems of preparation and performance research of silicate nanotubes that have not been seen yet, and achieve low cost, easy control, The effect of simple method
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Embodiment 1
[0028] Weigh 1g of analytically pure copper sulfate and dissolve it in 30mL of water, place it in a 40ml stainless steel pressure-resistant reaction kettle, add about 1g of solid sodium silicate, and stir evenly. After reacting at 100° C. for 24 h, the resulting precipitate was filtered, washed and dried to obtain a blue-gray powder. The product is identified as copper silicate (such as figure 1 Shown); use transmission electron microscope (TEM) to carry out morphology analysis to copper silicate, it can be seen that its morphology is nanotube (such as figure 2 As shown), the diameter of the tube is between 5 and 6 nm, the length is 100 nm, and the aspect ratio is more than 20. Specific surface up to 200m 2 / g or more. The copper silicate product was subjected to hydrogen storage and gas adsorption experiments, and the results showed that hydrogen storage was 1.8-2.5%, methane adsorption was 20%, and carbon monoxide adsorption was 25%.
Embodiment 2
[0030] Weigh 3g of analytically pure magnesium chloride and dissolve it in a mixture of 10mL of water and 20mL of acetone, place it in a 40ml stainless steel pressure-resistant reaction kettle, add about 3.3g of solid potassium silicate, and stir evenly. After reacting at 120°C for 48 hours, the obtained precipitate was filtered, washed and dried to obtain a white powder. The product is identified as magnesium silicate through X-ray powder diffraction (such as image 3 Shown); Morphological analysis of magnesium silicate with transmission electron microscope (TEM), it can be seen that its morphology is nanotubes (such as Figure 4 shown), the diameter of the tube is between 10-15nm, the length is 300-500nm, and the aspect ratio is over 30. Specific surface up to 300m 2 / g or more. The magnesium silicate product is subjected to hydrogen storage and gas adsorption experiments, and the results show that hydrogen storage is 0.8-1.5%, methane adsorption is 13%, and carbon monoxi...
Embodiment 3
[0032] Weigh 0.5g of analytically pure barium nitrate and dissolve it in a mixture of 5mL of water and 30mL of ethanol, place it in a 40ml stainless steel pressure-resistant reaction kettle, add 5mL of ethyl orthosilicate, and stir evenly. After reacting at 180°C for 96 hours, the obtained precipitate was filtered, washed and dried to obtain a white powder. The product was identified as barium silicate by X-ray powder diffraction (such as Figure 5 shown); the morphology of barium silicate was analyzed by transmission electron microscope (TEM), and it can be seen that its morphology is nanotubes (such as Image 6 As shown), the diameter of the tube is between 10-15nm, the length is 100-200nm, and the aspect ratio is over 10. Specific surface up to 250m 2 / g or more. The barium silicate product was subjected to hydrogen storage and gas adsorption experiments, and the results showed that hydrogen storage was 0.8-1.3%, methane adsorption was 16%, and carbon monoxide adsorption...
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