Preparation method of catalytic material mixed by copper and cerium oxide

A catalytic material, cerium oxide technology, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, etc., to achieve the effects of simple operation, high pore volume, and easy industrial production

Inactive Publication Date: 2013-04-24
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are domestic reports on Cu-doped mesoporous CeO 2 Reports are still rare

Method used

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  • Preparation method of catalytic material mixed by copper and cerium oxide
  • Preparation method of catalytic material mixed by copper and cerium oxide
  • Preparation method of catalytic material mixed by copper and cerium oxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (a) Take 0.06318g copper nitrate (Cu(NO 3 ) 2 ·3H 2 O) Dissolve in deionized water and stir continuously for 0.5h; the concentration of Cu ions is 0.00872mol / mL;

[0033] (b) According to the liquid-solid ratio of 8:1, add the mesoporous ceria powder into the copper salt solution obtained in step (a), after dissolving, let stand for 24 hours, and stir occasionally during the period;

[0034] (c) Put the mixed solution of step (b) in a constant temperature drying oven to dry at 110°C for 10 hours, then grind it and place it in a muffle furnace for sintering at 300°C for 2 hours to obtain a copper-doped cerium oxide catalytic material, which The specific surface area is 154.289m 2 / g, the pore volume is 0.975cm 3 / g.

[0035] Wherein, the mesoporous ceria powder is prepared through the following steps:

[0036] (1) Take 52.240g cerium nitrate (Ce(NO 3 ) 3 ·6H 2 O) and 5.2510 g of citric acid were dissolved in deionized water, and continuously stirred for 0.5 h to...

Embodiment 2

[0043] (a) Take 0.1972g copper nitrate (Cu(NO 3) 2 ·3H 2 O) Dissolve in deionized water and stir continuously for 0.8h; the concentration of Cu ions is 0.02616mol / mL;

[0044] (b) According to the liquid-solid ratio of 10:1, add the mesoporous ceria powder into the copper salt solution obtained in step (a), after dissolving, let stand for 36 hours, and stir occasionally during the period;

[0045] (c) Put the mixed solution of step (b) in a constant temperature drying oven to dry at 120°C for 12h, and then put it in a muffle furnace and bake at 280°C for 3h after grinding to obtain a copper-doped cerium oxide catalytic material, which The specific surface area is 150.976m 2 / g, the pore volume is 0.879cm 3 / g.

[0046] Wherein, the mesoporous ceria powder is prepared through the following steps:

[0047] (1) Take 17.3652g cerium nitrate (Ce(NO 3 ) 3 ·6H 2 O) and 1.72812g of citric acid were dissolved in deionized water and stirred continuously for 0.5h to obtain a cit...

Embodiment 3

[0054] (a) Take 0.3235g copper nitrate (Cu(NO 3 ) 2 ·3H 2 O) Dissolve in deionized water and stir continuously for 1h; the concentration of Cu ions is 0.0436mol / mL;

[0055] (b) According to the liquid-solid ratio of 6:1, add the mesoporous ceria powder into the copper salt solution obtained in step (a), after dissolving, let stand for 48 hours, and stir occasionally during the period;

[0056] (c) Put the mixed solution in step (b) in a constant temperature drying oven to dry at 120°C for 10 hours, and then grind it and place it in a muffle furnace and bake it at 200°C for 2.5 hours to obtain a copper-doped cerium oxide catalytic material. Its specific surface area is 147.630m 2 / g, the pore volume is 0.859cm 3 / g.

[0057] Wherein, the mesoporous ceria powder is prepared through the following steps:

[0058] (1) Take 30.8873g cerium nitrate (Ce(NO 3 ) 3 ·6H 2 O) and 3.1002g of citric acid were dissolved in deionized water, and continuously stirred for 0.8h to obtain...

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Abstract

The invention provides a preparation method of a catalytic material mixed by copper and cerium oxide. The preparation method comprises the following steps of: (a) dissolving copper salt in a solvent, and continuously mixing the copper salt for 0.5-1 hour, wherein the concentration of Cu ions is 0.00872-0.17492 mol/mL; (b) adding mesoporous cerium oxide powder into a copper salt solution obtained by the step (a) according to the liquid-to-solid ratio of 10:1 to 6:1, stilling the copper salt solution for 24-48 hours after the mesoporous cerium oxide powder is dissolved, and meanwhile, aperiodically stirring the copper salt solution; (c) drying the mixed solution obtained by the step (b) at 110-120 DEG C for 10-12 hours, grinding the dried resultant, and calcining the resultant at 200-300 DEG C for 2-3 hours, thus obtaining the catalytic material mixed by the copper and the cerium oxide. The preparation method has the advantages of simplicity in operation and experimental procedure, low cost of raw materials, and no environmental pollution, and the prepared catalytic material has the advantages of large specific surface area and pore volume, high low-temperature activity and favorable thermal stability. The prepared catalytic material can be widely applied to optical CO oxidation sensors, motor vehicle exhaust gas cleaning and purification systems and the like, and is prone to industrial production.

Description

technical field [0001] The invention relates to a CuO-CeO for low-temperature CO oxidation reaction 2 The invention relates to a preparation method of a high-efficiency catalytic material, specifically belonging to the technical field of cerium-based metal materials. Background technique [0002] As a rare earth element, cerium has many advantages, such as: under oxygen-rich (oxidizing conditions), it can convert Ce 3+ Oxidized to Ce 4+ , so as to store oxygen atoms in the material; and under oxygen-poor (reducing conditions), it can release the stored oxygen atoms, that is, Ce 4+ is reduced to Ce 3+ , so that the reducing substance gets oxygen atoms, and the purpose of releasing oxygen atoms is achieved. This makes cerium, a rare earth element, a good catalyst material. In terms of catalysts, mesoporous materials have been extensively studied because of their good specific surface area and volume ratio. For example, Song Xiaolan et al. (CN1837053A) synthesized mesoporo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/83
Inventor 纳薇王华田俊杰
Owner KUNMING UNIV OF SCI & TECH
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