A kind of cerium-zirconium composite oxide and its preparation method and application
A technology of composite oxides and oxides, applied in chemical instruments and methods, separation methods, metal/metal oxides/metal hydroxide catalysts, etc. Restricting the exhaust gas purification ability of automobiles, catalyst life, uneven dispersion of metal elements, etc., to achieve the effects of avoiding poisoning, strong anti-aging ability, and long service life
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Embodiment 1
[0055] This embodiment provides a cerium-zirconium composite oxide and a preparation method thereof.
[0056] In the cerium-zirconium composite oxide: cerium oxide, zirconium oxide, aluminum oxide, lanthanum oxide, praseodymium oxide and sulfate radical, the specific proportions thereof are: 30%, 30%, 20%, 10%, 5%, 5%.
[0057] The preparation steps are as follows:
[0058] Put 300g of zirconium oxide corresponding to zirconia and 300g of cerium oxide corresponding to cerium ammonium nitrate solution in 2000mL ultrapure water, and raise the temperature of the solution to 90°C, and slowly add 200g of aluminum sulfate corresponding to aluminum oxide into the solution, Stir and age for 2h. The temperature of the solution was lowered to room temperature, and 100 g of lanthanum nitrate corresponding to lanthanum oxide was slowly added to the above solution, and 50 g of nitric acid spectrum aqueous solution corresponding to praseodymium oxide was added to the above solution to fina...
Embodiment 2
[0061] This embodiment provides a cerium-zirconium-titanium composite oxide and a preparation method thereof.
[0062] In the cerium-zirconium-titanium composite oxide: cerium oxide, zirconia, titanium oxide, lanthanum oxide, praseodymium oxide and sulfate radical, the specific proportions are: 30%, 30%, 20%, 10%, 5%, 5% .
[0063] The preparation steps are as follows:
[0064] Put 300g of zirconium oxide corresponding to zirconia and 300g of cerium oxide corresponding to cerium ammonium nitrate solution in 2000mL ultrapure water, and raise the temperature of the solution to 90°C, and slowly add 200g of titanium sulfate corresponding to titanium oxide into the solution, Stir and age for 2h. The temperature of the solution was lowered to room temperature, and 100 g of lanthanum nitrate corresponding to lanthanum oxide was slowly added to the above solution, and 50 g of nitric acid spectrum aqueous solution corresponding to praseodymium oxide was added to the above solution to...
Embodiment 3
[0066] This embodiment provides a cerium-zirconium composite oxide and a preparation method thereof.
[0067] In the cerium-zirconium composite oxide: cerium oxide, zirconium oxide, aluminum oxide, lanthanum oxide, praseodymium oxide and sulfate radical, the specific proportions thereof are: 30%, 40%, 10%, 10%, 5%, 5%.
[0068] The preparation steps are as follows:
[0069] The specific implementation is the same as in Example 1, the zirconium nitrate corresponding to 300g zirconia and the aluminum sulfate corresponding to 200g aluminum oxide are replaced with the corresponding aluminum nitrate corresponding to 400g zirconium oxide and 100g aluminum oxide, other ingredients and operation methods are all the same as Embodiment 1 is consistent.
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Abstract
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