Rare earth element-doped layered composite metal hydroxide and preparation and application thereof
A hydroxide, layered composite technology, applied in metal/metal oxide/metal hydroxide catalyst, chemical/physical process, oxidized water/sewage treatment, etc. , suitable for problems such as narrow pH range, to achieve the effect of simple preparation and good environmental adaptability
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[0024] Example 1
[0025] The preparation and application of a rare earth element-doped layered composite metal hydroxide can be achieved through the following steps:
[0026] (1) Prepare 200mL solution A, which contains 7.5mmol·L -1 Cu 2+ , 22.5mmol·L -1 Ni 2+ , 14.25mmol·L -1 Fe 3+ And 0.75mmol·L -1 La 3+ , Prepare another 100ml solution B, which contains 0.5mol·L -1 NaOH and 0.1mol·L -1 Na 2 CO 3 .
[0027] (2) Pour the prepared solution A and solution B into the burette respectively, and slowly add them dropwise to a beaker containing 100 mL of ultrapure water and react under vigorous stirring to obtain a mixed solution. The pH value of the solution is maintained at 7±0.2 to control the dropping rate until the solution A is dropped. The mixed solution obtained by the reaction was stirred for 1 hour, and then placed in an oven for aging at 40° C. for 24 hours, and then filtered for solid-liquid separation. The obtained solid precipitate was washed with ultrapure water three times...
Example Embodiment
[0030] Example 2
[0031] The preparation and application of a rare earth element-doped layered composite metal hydroxide can be achieved through the following steps:
[0032] (1) Prepare 200mL solution A, which contains 7.5mmol·L -1 Cu 2+ , 22.5mmol·L -1 Ni 2+ , 13.5mmol·L -1 Fe 3+ And 1.5mmol·L -1 La 3+ , Prepare another 100ml solution B, which contains 0.5mol·L -1 NaOH and 0.1mol·L -1 Na 2 CO 3 .
[0033] (2) Pour the prepared solution A and solution B into the burette respectively, and slowly add them dropwise to a beaker containing 100 mL of ultrapure water and react under vigorous stirring to obtain a mixed solution. The pH value of the solution is kept at 8±0.2 to control the dropping rate until the solution A is dropped. The mixed solution obtained by the reaction was stirred for 1 hour, and then put into an oven for aging at 60° C. for 24 hours, and then filtered for solid-liquid separation. The obtained solid precipitate was washed with ultrapure water three times until th...
Example Embodiment
[0036] Example 3
[0037] The preparation and application of a rare earth element-doped layered composite metal hydroxide can be achieved through the following steps:
[0038] (1) Prepare 200mL solution A, which contains 7.5mmol·L -1 Cu 2+ , 22.5mmol·L -1 Ni 2+ , 13.5mmol·L -1 Fe 3+ And 1.5mmol·L -1 La 3+ , Prepare another 100ml solution B, which contains 0.5mol·L -1 NaOH and 0.1mol·L -1 Na 2 CO 3 .
[0039] (2) Pour the prepared solution A and solution B into the burette respectively, and slowly add them dropwise to a beaker containing 100 mL of ultrapure water and react under vigorous stirring to obtain a mixed solution. The pH value of the solution is kept at 9±0.2 to control the dropping rate until the solution A is dropped. The mixed solution obtained by the reaction was stirred for 1 hour, and then placed in an oven for aging at 50° C. for 36 hours, and then filtered for solid-liquid separation. The obtained solid precipitate was washed with ultrapure water three times until t...
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