Method for preparation of three-dimensional ordered macroporous Ce-Zr material by using PMMA as template
A three-dimensional ordered, ce-zr technology, applied in the field of material chemistry, can solve the problems of poor thermal stability, small specific surface area, and no special structure, etc., to achieve excellent heat dissipation performance, large specific surface area, improved catalytic activity and production efficiency rate effect
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[0026] Example 1
[0027] (1) According to the molar ratio of Ce ion to Zr ion of 3:1, mix cerium nitrate and zirconium nitrate, and then add deionized water to prepare a solution with a concentration of 0.1 mol / L;
[0028] (2) According to the mass ratio of metal salt (cerium nitrate and zirconium nitrate):citric acid = 1:1.5, add citric acid to the solution of step (1), and stir at a constant temperature of 40 at a speed of 800r / min at 30°C. minute;
[0029] (3) According to the mass ratio of PMMA: metal salt (cerium nitrate and zirconium nitrate)=1:1, add the PMMA template to the solution of step (2) for mixing;
[0030] (4) Put the mixed solution of step (3) to stand at room temperature for 3 hours, and then place it at 90°C for 24 hours to dry at a constant temperature to obtain a crude product to remove the water;
[0031] (5) The crude product obtained in step (4) is heated to 500°C at a heating rate of 2°C / min and kept at constant temperature for 3 hours to obtain a three-dimen...
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[0036] Example 2
[0037] (1) According to the molar ratio of Ce ion to Zr ion of 9:1, mix cerium nitrate and zirconium nitrate, and then add deionized water to prepare a solution with a concentration of 0.5 mol / L;
[0038] (2) According to the mass ratio of metal salt (cerium nitrate and zirconium nitrate):citric acid = 1:1.2, add citric acid to the solution of step (1), and stir at a constant temperature of 1000r / min at 20°C for 30 minute;
[0039] (3) According to the mass ratio of PMMA:metal salt (cerium nitrate and zirconium nitrate) = 1:2, add the PMMA template to the solution of step (2) for mixing;
[0040] (4) The mixed solution of step (3) is allowed to stand at room temperature for 4 hours, and then dried at 60°C for 20 hours to obtain a crude product to remove moisture;
[0041] (5) The crude product obtained in step (4) is heated to 450°C at a heating rate of 2°C / min and kept at a constant temperature for 4 hours to obtain a three-dimensional ordered macroporous Ce-Zr mate...
Example Embodiment
[0046] Example 3
[0047] (1) According to the molar ratio of Ce ion to Zr ion of 1:1, mix cerium nitrate and zirconium nitrate, and then add deionized water to obtain a solution with a concentration of 1mol / L;
[0048] (2) According to the mass ratio of metal salt (cerium nitrate and zirconium nitrate):citric acid=1:1, add citric acid to the solution of step (1), and stir at a constant temperature of 300r / min at 90℃ for 60 minute;
[0049] (3) According to the mass ratio of PMMA: metal salt (cerium nitrate and zirconium nitrate) = 1:3, add the PMMA template to the solution of step (2) for mixing;
[0050] (4) The mixed solution of step (3) is allowed to stand at room temperature for 2 hours, and then dried at 30°C for 12 to 24 hours to obtain a crude product to remove the water;
[0051] (5) The crude product obtained in step (4) is heated to 600°C at a heating rate of 2°C / min and kept at constant temperature for 2 hours to obtain a three-dimensional ordered macroporous Ce-Zr material...
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