A kind of cerium oxide coated micron copper powder and its preparation method and application

A technology of the first cerium oxide and cerium oxide, which is applied in the direction of carbon monoxide, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of difficult modification of micron copper powder, and achieve high catalytic performance Effect

Active Publication Date: 2022-06-03
HUAZHONG UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] This application provides a cerium oxide-coated micron copper powder and its preparation method and application to solve the technical problem that the micron copper powder is difficult to modify to obtain high catalytic performance in the prior art

Method used

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  • A kind of cerium oxide coated micron copper powder and its preparation method and application
  • A kind of cerium oxide coated micron copper powder and its preparation method and application
  • A kind of cerium oxide coated micron copper powder and its preparation method and application

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preparation example Construction

[0026] figure 1 As shown, in one embodiment of the present application, the present application provides a preparation method of cerium oxide-coated micron copper powder, the method comprising:

[0027] S1. cerium salt, micron copper powder and organic solvent are mixed and ignited, and self-combustion is carried out to obtain the first cerium oxide-wrapped micron copper powder;

[0028] The first cerium oxide-wrapped micron copper powder has a core-shell structure, wherein the mass ratio of the outer cerium oxide and the inner core copper micro-particles is 1.5-2:1.

[0029] In general, the first cerium oxide-coated micron copper powder is a gray solid.

[0030] In this application, the purpose of limiting the mass ratio of cerium oxide and micron copper powder to 1.5-2:1 is to make cerium oxide wrap micron copper powder to form a core-shell structure and a Cu-Ce interface; when the mass ratio is too large, The resulting adverse effect is that cerium oxide completely wraps ...

Embodiment 1

[0049] Select cerium salt as cerium acetate;

[0050] The mass-volume ratio of cerium acetate, micron copper powder and ethanol is 2.78g:1g:5ml;

[0051] The cerium acetate, the micron copper powder and the ethanol are mixed and stirred for 30 minutes until uniform, ignited, and self-combustion is carried out to obtain the first cerium oxide-coated micron copper powder;

[0052] The obtained first cerium oxide-wrapped micron powder has a core-shell structure, wherein the mass ratio of the outer cerium oxide and the inner core copper micro-particles is 1.5:1;

[0053] In an air atmosphere, the first cerium oxide-coated micron copper powder was calcined at a calcination temperature of 500 °C for 1 h, and ground to obtain a second cerium oxide-coated micron copper powder, which was denoted as CeO 2 @Cu-ac.

Embodiment 2

[0055] Select cerium salt as cerium acetate;

[0056] The mass volume ratio of cerium acetate, micron copper powder and ethanol is 0.92g: 1g: 5ml;

[0057] The cerium acetate, the micron copper powder and the ethanol are mixed and stirred for 30 minutes until uniform, ignited, and self-combustion is carried out to obtain the first cerium oxide-coated micron copper powder;

[0058] The obtained first cerium oxide-wrapped micron copper powder has a core-shell structure, wherein the mass ratio of the outer cerium oxide and the inner core copper microparticles is 0.5:1;

[0059] In an air atmosphere, the first cerium oxide-coated micron copper powder was calcined at a calcination temperature of 500° C. for 1 h, and ground to obtain a second cerium oxide-coated micron copper powder.

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Abstract

The application belongs to the technical field of application of micron copper powder, and in particular relates to a cerium oxide-wrapped micron copper powder and its preparation method and application; the method includes mixing cerium salt, micron copper powder and an organic solvent and igniting them, and performing self-combustion to obtain The first cerium oxide-wrapped micron copper powder; the first cerium oxide-wrapped micron copper powder has a core-shell structure, wherein the mass ratio of the shell cerium oxide to the core copper micron particles is 1.5-2:1; the cerium oxide-wrapped micron The copper powder is prepared by the method; the application includes the use of the cerium oxide-coated micron copper powder as a catalyst; the cerium salt forms cerium oxide and wraps the micron copper powder through the self-combustion of the cerium salt and the micron copper powder in an organic solvent Copper powder, which can obtain micron copper powder coated with cerium oxide with high catalytic efficiency, realizes the modification of micron-sized copper powder obtained by electrolysis or ball milling of industrial waste copper and obtains high catalytic performance.

Description

technical field [0001] The application belongs to the technical field of micron copper powder application, and in particular relates to a cerium oxide-wrapped micron copper powder and a preparation method and application thereof. Background technique [0002] The micron-sized copper powder obtained by electrolysis or ball milling of industrial waste copper is greatly restricted in catalytic applications due to its large particle size and small specific surface area. The growth of copper nanoparticles leads to catalyst deactivation, while large-particle copper powders are less studied in catalytic hydrogenation due to their low activity in catalytic applications. Therefore, how to modify the micron copper powder to obtain high catalytic hydrogenation activity is the current difficulty. SUMMARY OF THE INVENTION [0003] The present application provides a cerium oxide-wrapped micron copper powder and a preparation method and application thereof, so as to solve the technical ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/83B22F1/16C01B32/40
CPCB01J23/83B01J35/0073C01B32/40Y02P20/52
Inventor 张立麒鲁博文徐勇庆罗聪李小姗邬凡严满江伍凤罗曦
Owner HUAZHONG UNIV OF SCI & TECH
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