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Preparation method of cubic copper-cerium composite oxides

A technology of composite oxides and cubes, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, rare earth metal compounds, etc., can solve the problem that the shape of copper-cerium composite oxide is limited by the shape of the template, template removal Difficulties and other problems, to achieve the effect of high product purity, simple operation and simple raw materials

Inactive Publication Date: 2012-09-19
HEILONGJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention aims to solve the technical problems that the existing method for preparing copper-cerium composite oxides using templates has difficulty in template removal, and the shape of copper-cerium composite oxides is limited by the shape of templates, and provides a method for preparing cubic copper-cerium composite oxides.

Method used

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  • Preparation method of cubic copper-cerium composite oxides
  • Preparation method of cubic copper-cerium composite oxides
  • Preparation method of cubic copper-cerium composite oxides

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specific Embodiment approach 1

[0012] Specific embodiment one: the preparation method of cube-shaped copper-cerium composite oxide in this embodiment is as follows:

[0013] 1. Adding Cu(CH 3 COO) 2 ·H 2 O and Ce(NO 3 ) 3 ·6H 2 Add O into ethylene glycol, stir and dissolve until the total concentration of Cu ions and Ce ions is 0.05mol L -1 ~0.5mol·L -1 A mixed solution of which Cu(CH 3 COO) 2 ·H 2 O and Ce(NO 3 ) 3 ·6H 2 The molar ratio of O is 1~9: 3;

[0014] 2. Put the mixed solution prepared in step 1 into a microwave reactor, and react for 10min to 30min under the conditions of microwave power of 650W and duty ratio of 50% to 90%, then cool to room temperature, filter, and remove the precipitate Rinse until the washing solution has no foam, then wash the precipitate with absolute ethanol for 3 times, then dry at 80°C to 100°C for 18h to 24h, and then bake at 300°C to 500°C for 4h to obtain a cubic copper-cerium composite oxide .

[0015] The frequency of the microwave reactor described ...

specific Embodiment approach 2

[0016] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that the total concentration of Cu ions and Ce ions obtained by stirring and dissolving in step 1 is 0.1 mol L -1 ~O.4mol·L -1 mixed solution. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0017] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the total concentration of Cu ions and Ce ions obtained by stirring and dissolving in step 1 is 0.2 mol L -1 ~0.3mol·L -1 mixed solution. Others are the same as in the first or second embodiment.

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Abstract

The invention relates to a preparation method of copper-cerium composite oxides, particularly a preparation method of cubic copper-cerium composite oxides. The invention solves the technical problems that the template is hard to remove and the shape of the copper-cerium composite oxides is restricted by the shape of the template in the existing method of preparing cubic copper-cerium composite oxides by utilizing a template. The method comprises the following steps: 1. adding Cu(CH3COO)2.H2O and Ce(NO3)3.6H2O into ethylene glycol to obtain a mixed solution; and 2. adding the mixed solution obtained in the step 1 into a microwave reactor to react, cooling to room temperature, filtering, washing the precipitate, drying, and roasting to obtain the cubic copper-cerium composite oxides. The invention has the outstanding characteristics of simple raw materials, resource saving, low cost and high product purity, is simple to operate, and does not need any template, surfactant or precipitant.

Description

technical field [0001] The invention relates to a preparation method of copper-cerium composite oxide. Background technique [0002] In recent years, due to the novel properties of structural materials with special morphology, scientists have devoted considerable energy to the controllable synthesis of the morphology and structure of materials, and strive to construct novel materials from nanoscale to mesoscopic scale. . [0003] Copper-cerium composite oxides are widely used in hydrogen production from methanol reforming, preferential oxidation of CO, and low-temperature oxidation of CO. The morphology and structure of the catalyst determine its performance. At present, the morphology synthesis method for preparing oxides by researchers is mainly realized by means of soft template materials such as hard templates or surfactants, which is to form a material structure on the surface of the template, and then pass Acid-base dissolution, pyrolysis, etc. remove the template to...

Claims

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Application Information

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IPC IPC(8): C01G3/02C01F17/00B01J23/83B01J35/02
Inventor 刘春涛孙玮琦侯海鸽王阔谷宇
Owner HEILONGJIANG UNIV