Method for preparing nano cerium dioxide by autocatalytic burning process
A nano-cerium dioxide and combustion agent technology, which is applied in the direction of chemical instruments and methods, nanotechnology, nanotechnology, etc., can solve the problems that the size of ceria particles is greatly affected, the production process is not very mature, and the reaction conditions are harsh. Achieve the effect of low equipment requirement, low price and low preparation cost
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Embodiment 1
[0017] Pour 8.6850g of cerous nitrate hexahydrate into a 100ml beaker, add water to make a 50mL solution, stir, and then add 1.8217g of sorbitol at room temperature. The concentration of cerous nitrate is 0.4mol / L, and the molar ratio of sorbitol and cerous nitrate is 0.5. After dissolving, add ammonia water dropwise to keep the pH value at 10 and continue to stir for 1 hour. Transfer the above liquid to an evaporating dish for autocatalytic combustion at a temperature above 150° C. for 12 hours to obtain cerium oxide (see Table 1 for grain size).
Embodiment 2
[0019] Pour 8.6850g of cerous nitrate hexahydrate into a 100ml beaker, add water to form a 50mL solution, stir, and then add 3.6434g of sorbitol at room temperature. The concentration of cerous nitrate is 0.4mol / L, and the molar ratio of sorbitol and cerous nitrate is 1. After dissolving, add ammonia water dropwise to keep the pH value at 10 and continue to stir for 1 hour. Transfer the above liquid to an evaporating dish for autocatalytic combustion at a temperature above 150° C. for 12 hours to obtain cerium oxide (see Table 1 for grain size).
Embodiment 3
[0021] Pour 8.6850g of cerous nitrate hexahydrate into a 100ml beaker, add water to form a 50mL solution, stir, and then add 7.2868g of sorbitol at room temperature. The concentration of cerous nitrate is 0.4mol / L, and the molar ratio of sorbitol to cerous nitrate is 2. After dissolving, add ammonia water dropwise to keep the pH value at 10, continue to stir for 1 hour, transfer the above liquid to an evaporating dish at a temperature above 150°C, dry and autocatalyze for 12 hours to obtain cerium oxide (see Table 1 for grain size).
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