A preparation method of cerium-based oxygen storage material doped with magnesium and aluminum mesoporous hollow microspheres
A technology of hollow microspheres and oxygen storage materials, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, inorganic chemistry, etc., can solve the problem of oxygen storage capacity and specific surface area reduction, loss of porous structure, Poor thermal stability and other problems, to achieve the effect of improving oxygen storage capacity, increasing specific surface area, and simple preparation steps
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example 1
[0017] First, weigh 150g of sodium silicate, put it into a container, and add 550mL of water into the container at the same time, control the temperature at 37°C, stir at 300r / min for 1h, and add it dropwise at a rate of 2 drops / s while stirring. 20mL mass fraction is 30% hydrochloric acid solution, after the stirring is completed, move the container with the mixed solution into an ultrasonic disperser, carry out ultrasonic dispersion treatment for 2h, and obtain a dispersion liquid; then add 15mL mass concentration of 1.5mol / L magnesium nitrate solution and 15mL aluminum nitrate solution with a mass concentration of 1.2mol / L, after stirring and mixing at 260r / min, 10mL acetone was added dropwise to it, and ultrasonic dispersion treatment was carried out for 1h, and then 10g After mixing cerium acetylacetonate, shake it in a shaker for 2 hours; after shaking it, add 10 mL of ammonia water with a mass fraction of 17% to the shaker at a rate of 2 drops / s, adjust the pH to 9.0, an...
example 2
[0019]First weigh 175g of sodium silicate, put it into a container, and add 600mL of water into the container at the same time, control the temperature at 38°C, stir at 300r / min for 2h, and add it dropwise at a rate of 3 drops / s while stirring. 23mL mass fraction is 30% hydrochloric acid solution, after the stirring is completed, move the container with the mixed solution into an ultrasonic disperser, carry out ultrasonic dispersion treatment for 3h, and obtain a dispersion liquid; then add 20mL mass concentration of 1.5mol / L magnesium nitrate solution and 18mL aluminum nitrate solution with a mass concentration of 1.2mol / L were stirred and mixed evenly at 260r / min, then 11mL acetone was added dropwise to it, and ultrasonic dispersion was performed for 2 hours, and then 13g After mixing cerium acetylacetonate, shake it in a shaker for 3 hours; after shaking it, add 13 mL of ammonia water with a mass fraction of 17% to the shaker at a rate of 3 drops / s, adjust the pH to 9.5, and...
example 3
[0021] First weigh 200g of sodium silicate, put it into a container, and add 650mL of water into the container at the same time, control the temperature at 39°C, stir at 300r / min for 2h, and add it dropwise at a rate of 3 drops / s while stirring. 25mL mass fraction is 30% hydrochloric acid solution, after stirring is completed, the container that mixed solution is housed is moved in the ultrasonic disperser, carry out ultrasonic dispersion treatment 3h, obtain dispersion liquid; Then add 25mL mass concentration to the dispersion liquid obtained above respectively 1.5mol / L magnesium nitrate solution and 20mL aluminum nitrate solution with a mass concentration of 1.2mol / L, after stirring and mixing at 260r / min, 12mL of acetone was added dropwise to it, and ultrasonic dispersion treatment was performed for 2 hours, and then 15g of After mixing cerium acetylacetonate, shake it in a shaker for 3 hours; after shaking it, add 15 mL of ammonia water with a mass fraction of 17% to the sh...
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