Preparation method of porous CuO-CeO2 dual-metallic oxide catalyst

A double metal oxide and catalyst technology, applied in the direction of catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., to achieve the effects of high controllability, simple and easy method, and large output

Inactive Publication Date: 2017-01-11
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Compared with single-component metal oxides, due to the differences in nucleation and growth behaviors of different metal oxides, it is challenging to prepare bimetallic oxides with uniform components and regular structures.

Method used

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  • Preparation method of porous CuO-CeO2 dual-metallic oxide catalyst
  • Preparation method of porous CuO-CeO2 dual-metallic oxide catalyst
  • Preparation method of porous CuO-CeO2 dual-metallic oxide catalyst

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Experimental program
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Effect test

Embodiment 1

[0033] Take 0.5 g Ce(NO 3 ) 3 ·6H 2 O, 1.5 g Cu(NO 3 ) 2 ·3H 2 O. Dissolve 2 g of silica colloidal particles (particle size: 50 nm) in 5 ml of deionized water, heat to 150°C, and then add 400 mg of glycine. After the reaction is over, cool and wash with deionized water several times. Obtain CuO-CeO with silica template 2 double metal oxides;

[0034] CuO-CeO containing silica template 2 Double metal oxide, dispersed in 2 mol / L sodium hydroxide solution, stirred at 80°C for 8 h, centrifuged and rinsed briefly, then etched the silica template with 2 mol / L sodium hydroxide solution again, after the reaction , washed with deionized water and ethanol, and dried to obtain CuO and CeO with a pore size of 50 nm 2 Porous CuO-CeO with a molar ratio of 84:16 2 Bimetallic oxide catalysts.

Embodiment 2

[0036] Take 1 g Ce(NO 3 ) 3 ·6H 2 O, 1 g Cu(NO 3 ) 2 ·3H 2 O. Dissolve 2 g of silica colloidal particles (particle size: 50nm) in 5 ml of deionized water, heat to 150°C, and then add 400 mg of glycine. After the reaction, cool and wash with deionized water several times to obtain CuO-CeO with silica template 2 double metal oxides;

[0037] CuO-CeO containing silica template 2 Double metal oxide, dispersed in 2 mol / L sodium hydroxide solution, stirred at 80°C for 8 h, centrifuged and rinsed briefly, then etched the silica template with 2 mol / L sodium hydroxide solution again, after the reaction , washed with deionized water and ethanol, and dried to obtain CuO and CeO with a pore size of 50 nm 2 Porous CuO-CeO with a molar ratio of 64:36 2 Bimetallic oxide catalysts.

Embodiment 3

[0039] Take 1.5 g Ce(NO 3 ) 3 ·6H 2 O, 0.5 g Cu(NO 3 ) 2 ·3H 2 O. Dissolve 2 g of silica colloidal particles (particle size: 50 nm) in 5 ml of deionized water, heat to 150°C, and then add 400 mg of glycine. After the reaction is over, cool and wash with deionized water several times. Obtain CuO-CeO with silica template 2 double metal oxides;

[0040] CuO-CeO containing silica template 2 Double metal oxide, dispersed in 2 mol / L sodium hydroxide solution, stirred at 80°C for 8 h, centrifuged and rinsed briefly, then etched the silica template with 2 mol / L sodium hydroxide solution again, after the reaction , washed with deionized water and ethanol, and dried to obtain CuO and CeO with a pore size of 50 nm 2 Porous CuO-CeO with a molar ratio of 36:64 2 Bimetallic oxide catalysts.

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Abstract

The invention provides a preparation method of a porous CuO-CeO2 dual-metallic oxide catalyst. The preparation method applies a novel combustion method of combining a traditional combustion method and a silicon dioxide colloid particle plate, mixes cerate, copper salt, a silicon dioxide colloid particles template and glycine to spontaneously burn under 150 DEG C; removes silicon dioxide by corroding sodium hydroxide solution; thus the porous CuO-CeO2 dual-metallic oxide catalyst is obtained. The porous CuO-CeO2 dual-metallic oxide catalyst prepared by the method is big in output and high in purity; ratio of every component and aperture are easy to control. The method is simple and easy to practice, small in pollution, low in cost and has certain universality. The prepared porous CuO-CeO2 dual-metallic oxide catalyst has the advantage of porous geological structure, and CeO2 is tightly contacted with CuO, so that the synergistic effect between CeO2 and CuO can be well displayed, CeO2 and CuO have excellent catalytic activity in CO catalytic reaction.

Description

technical field [0001] The invention belongs to the technical field of catalytic materials, in particular, the invention relates to a porous CuO-CeO 2 Preparation method of double metal oxide catalyst. Background technique [0002] Compared with ordinary solid materials, porous materials have special structural advantages, such as high specific surface area and unobstructed active sites, which enhance their mass transfer and diffusion properties, endowing them with importance in catalytic technology. So far, based on soft-template or hard-template-assisted methods, porous CeO 2 Studies on bimetallic oxide-based catalysts have been widely reported. However, for the soft template method, the process of high temperature treatment to remove the surfactant tends to cause the collapse of the porous structure. For the hard template method, the metal salt precursor is usually first impregnated into the pores of the mesoporous structure template (such as SBA-15, KIT-6, CMK-3), and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/83B01J35/10B01J37/34
CPCB01J23/83B01J35/10B01J37/349B01J2523/00
Inventor 陈国柱宋国隆王勇
Owner UNIV OF JINAN
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