Cerium oxide regulated, controlled and synthesized by anionic polyelectrolyte template and preparation method thereof
A polyelectrolyte and anion technology, applied in chemical instruments and methods, nanotechnology for materials and surface science, inorganic chemistry, etc., can solve problems such as the self-assembly mechanism that has not been studied, and achieve easy control, simple methods, and reaction conditions mild effect
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Embodiment 1
[0032] Cerium carbonate particles were synthesized without adding PSS, as a comparative experiment:
[0033](1) Prepare a cerium nitrate solution with a concentration of 1.55mol / L, adjust the pH value to 4, take 7.5ml of the solution in a 1000ml beaker, add water to 233ml, so that [Ce 3+ ] is 0.05mol / L;
[0034] (2) Weigh 3g of precipitant ammonium carbonate, add 625mL of water to dissolve, stir and mix evenly;
[0035] (3) Use a peristaltic pump to add the precipitant solution to the cerium salt solution at a certain flow rate. The feeding time is 2 hours. After the feeding is completed, continue to stir for 0.5 hours, age for 4 hours, filter with suction, and dry to obtain irregular flaky carbonic acid. Cerium particles, such as figure 1 shown.
Embodiment 2
[0037] (1) Prepare a cerium nitrate solution with a concentration of 1.55mol / L, adjust the pH value to 4, take 7.5ml of the solution in a 1000ml beaker, add water to 133ml; weigh the anionic polyelectrolyte solid powder, add water 100ml to dissolve; anionic polyelectrolyte The electrolytic solution is stirred and added to the cerium salt solution until uniform, so that [Ce 3+ ] is 0.05mol / L, [PSS] is 0.5g / L;
[0038] (2) Weigh 3g of precipitant ammonium carbonate, add 625mL of water to dissolve, stir and mix evenly;
[0039] (3) Use a peristaltic pump to add the precipitant solution to the mixed solution of cerium nitrate and anionic polyelectrolyte at a certain flow rate. The addition time is 2 hours. After the addition is completed, continue to stir for 0.5 hours, age for 4 hours, suction filter, and dry to obtain Cage fusiform packed cerium carbonate particles, such as figure 2 shown;
[0040] (4) Cage fusiform stacked cerium carbonate particles were calcined at 400°C t...
Embodiment 3
[0045] (1) Prepare a cerium nitrate solution with a concentration of 1.55mol / L, adjust the pH value to 4, take 16.5ml of the solution in a 1000ml beaker, add water to 133ml; weigh the anionic polyelectrolyte solid powder, add 100ml of water to dissolve; anionic polyelectrolyte The electrolytic solution is stirred and added to the cerium salt solution until uniform, so that [Ce 3+ ] is 0.05mol / L, [PAA, wood sodium, SDS] is 0.5g / L;
[0046] (2) Weigh 3g of precipitant ammonium carbonate, add 625mL of water to dissolve, stir and mix evenly;
[0047] (3) Use a peristaltic pump to add the precipitant solution to the mixed solution of cerium nitrate and anionic polyelectrolyte at a certain flow rate. The addition time is 2 hours. After the addition is completed, continue to stir for 0.5 hours, age for 4 hours, suction filter, and dry to obtain Cage fusiform packed cerium carbonate particles such as Figure 5 , Figure 6 and Figure 7 shown.
[0048] (4) Cage fusiform stacked ce...
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