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Preparation method of copper-based Cu-Cu2O-CuO ternary composite core-shell material

A ternary compound, cu-cu2o-cuo technology, which is applied in the direction of catalyst activation/preparation, compounds of group 4/14 elements of the periodic table, chemical instruments and methods, etc., can solve the complex preparation process and unfavorable mass production , wide range of particle size distribution, etc., to achieve the effect of simple process route, wide particle size distribution and strong inclusiveness

Pending Publication Date: 2021-06-25
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention provides a copper-based Cu-Cu catalyst for practical problems in the prior art, such as unstable performance caused by a wide range of catalyst particle size distribution, catalyst hardening caused by copper oxidation exotherm, complicated preparation process and unfavorable for mass production, etc. 2 Preparation method of O-CuO ternary composite core-shell material

Method used

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  • Preparation method of copper-based Cu-Cu2O-CuO ternary composite core-shell material
  • Preparation method of copper-based Cu-Cu2O-CuO ternary composite core-shell material
  • Preparation method of copper-based Cu-Cu2O-CuO ternary composite core-shell material

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Experimental program
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Effect test

Embodiment 1

[0027] Embodiment 1: a kind of copper base Cu-Cu 2 The preparation method of O-CuO ternary composite core-shell material (see figure 1 ),Specific steps are as follows:

[0028] (1) Using high-purity copper powder with an average particle size of 500 μm as the raw material of the copper-containing powder, place the copper-containing powder at a temperature of 70° C. for 0.5 hours in vacuum;

[0029] (2) Argon gas is introduced into the DC thermal plasma system to exhaust the air, and Ar and O with a volume mixing ratio of 90:1 2 The mixed gas is the carrier gas, and the copper-containing powder raw material is sent into the thermal plasma torch at a feed rate of 0.1g / min through the carrier gas, where the power of the plasma generator is 14.0kW, and the working gas pressure of the carrier gas is 0.10MPa;

[0030] (3) Ar and O with a volume mixing ratio of 90:1 2 The mixed gas is hot plasma working gas. The working gas pressure of the hot plasma working gas is 0.10MPa. The co...

Embodiment 2

[0033] Embodiment 2: a kind of copper base Cu-Cu 2 The preparation method of O-CuO ternary composite core-shell material (see figure 1 ),Specific steps are as follows:

[0034] (1) Using high-purity copper powder with an average particle size of 0.1 μm as the raw material of the copper-containing powder, place the copper-containing powder at a temperature of 70° C. for 24 hours in vacuum;

[0035] (2) Argon gas is introduced into the DC thermal plasma system to exhaust the air, and the volume mixing ratio of Ar and O is 95:1. 2 The mixed gas is the carrier gas, and the copper-containing powder raw material is sent into the thermal plasma torch at a feed rate of 800g / min through the carrier gas, where the power of the plasma generator is 200kW, and the working gas pressure of the carrier gas is 0.60MPa;

[0036] (3) Ar and O with a volume mixing ratio of 95:1 2 The mixed gas is hot plasma working gas. The working gas pressure of the hot plasma working gas is 0.60MPa. The com...

Embodiment 3

[0039] Embodiment 3: a kind of copper base Cu-Cu 2 The preparation method of O-CuO ternary composite core-shell material (see figure 1 ),Specific steps are as follows:

[0040] (1) Dry mix industrial-grade copper powder and copper oxide powder in a roller mill for 8 hours to obtain a mixture with an average particle size of 3.7 μm as the raw material of copper-containing powder, and vacuum-dry the copper-containing powder at a temperature of 80°C for 6 hours , wherein the mass ratio of industrial grade copper powder and copper oxide powder is 1:1;

[0041] (2) Argon gas is introduced into the DC thermal plasma system to exhaust the air, and pure argon is used as the carrier gas, and the copper-containing powder raw material is fed into the thermal plasma torch at a feed rate of 4g / min through the carrier gas, and the plasma occurs The power of the device is 14.5kW, and the working gas pressure of the carrier gas is 0.16MPa;

[0042] (3) Use pure argon as the hot plasma work...

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Abstract

The invention relates to a preparation method of a copper-based Cu-Cu2O-CuO ternary composite core-shell material, and belongs to the technical field of catalysts. Aiming at the practical problems that the performance is unstable due to the wide particle size distribution range of catalyst particles, the catalyst is hardened due to copper oxidation heat release, the preparation process flow is complicated and is not beneficial to mass production and the like, copper-containing powder is dried and is fed into a thermal plasma torch through a carrier gas; and the atmosphere of the thermal plasma working gas in the reaction area is controlled so as to adjust the combination state of copper and oxygen, thereby obtaining the copper-based Cu-Cu2O-CuO ternary composite core-shell material which takes copper as a core, Cu2O as a middle shell layer and CuO as an outer shell. The copper oxide shell layer is in an amorphous state with a large number of defects and a disordered structure, and material migration in the organic silicon monomer synthesis process is facilitated. The method has the characteristics of simple equipment requirement, short process, high yield, easiness in operation and the like.

Description

technical field [0001] The invention relates to a copper-based Cu-Cu 2 The invention discloses a preparation method of an O-CuO ternary composite core-shell material, belonging to the technical field of catalysts. Background technique [0002] Silicone materials are a large class of functional material compounds with semi-inorganic and semi-organic structures. They have the dual advantages of both inorganic and organic substances. They are safe, reliable, non-toxic, non-polluting, non-corrosive, high temperature resistant, ozone resistant, Excellent properties of inorganic silica such as radiation resistance, aging resistance, flame resistance, arc resistance, corona resistance, leakage resistance, long life and physiological inertness, as well as moisture resistance, water repellency, easy processing, and can be made into products with different properties according to different needs. The outstanding characteristics of organic polymers such as products and easy modificati...

Claims

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Application Information

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IPC IPC(8): B01J37/34B01J23/72B01J35/02C07F7/16
CPCB01J37/349B01J23/72C07F7/16B01J35/396B01J35/23B01J35/40B01J35/50
Inventor 马文会万小涵于洁张嘉昆魏奎先吕国强李秀凤
Owner KUNMING UNIV OF SCI & TECH
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