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Preparation method of copper oxide-cuprous oxide composite catalyst

A composite catalyst and cuprous oxide technology, applied in the field of materials, can solve problems such as unfavorable cuprous oxide active sites, influence of photocatalytic performance, violent reaction, etc., and achieve the effects of good catalytic performance, easy control, and simple preparation process.

Inactive Publication Date: 2018-11-23
刘青
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these existing two-step methods can prepare cuprous oxide with specific morphology in advance, the reaction is usually more violent, and a large amount of cuprous oxide surface is covered by copper oxide, which is not conducive to the exposure of cuprous oxide active sites, and the photocatalytic performance Improvement is affected

Method used

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Examples

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Effect test

preparation example Construction

[0019] The invention discloses a method for preparing a copper oxide-cuprous oxide composite catalyst, comprising:

[0020] (1) Add a certain amount of nano-copper oxide powder into deionized water, and ultrasonically disperse for 1-3 hours to obtain a copper oxide suspension;

[0021] (2) Add copper acetate solution with a concentration of 0.1-1 mol / L to the above-mentioned copper oxide suspension, stir evenly, then add the dispersant polyethylene glycol, and ultrasonically disperse for 20-30 minutes to obtain a mixed suspension of copper acetate-copper oxide ;

[0022] (3) Under the condition of 70-80°C water bath, add sodium hydroxide solution and reducing agent dropwise to the above-mentioned copper acetate-copper oxide mixed suspension, control the pH value to 11-12, stir and react for 1-2 hours, and let stand , centrifuged, and the precipitate was washed with absolute ethanol and deionized water respectively, and dried under vacuum conditions at 60-80° C. for 3-5 hours ...

Embodiment 1

[0029] (1) adding a certain amount of nano-copper oxide powder into deionized water, and ultrasonically dispersing for 1 hour to obtain a copper oxide suspension;

[0030] (2) Add a copper acetate solution with a concentration of 0.1mol / L to the above copper oxide suspension, stir evenly, then add the dispersant polyethylene glycol, and ultrasonically disperse for 20 minutes to obtain a copper acetate-copper oxide mixed suspension;

[0031] (3) Under the condition of a water bath at 70°C, in the above-mentioned copper acetate-copper oxide mixed suspension, add dropwise successively a sodium hydroxide solution with a concentration of 1mol / L and hydrazine hydrate with a substance amount of 2mol, and control the pH value to 11, Stirring and reacting for 1 hour, standing still, and centrifuging, the precipitate was washed with absolute ethanol and deionized water, and dried under vacuum at 60°C for 3 hours to obtain a copper oxide-cuprous oxide composite catalyst.

[0032] In the ...

Embodiment 2

[0034] (1) adding a certain amount of nano-copper oxide powder into deionized water, and ultrasonically dispersing for 2 hours to obtain a copper oxide suspension;

[0035] (2) Add a copper acetate solution with a concentration of 0.5mol / L to the above-mentioned copper oxide suspension, stir evenly, then add the dispersant polyethylene glycol, and ultrasonically disperse for 25 minutes to obtain a copper acetate-copper oxide mixed suspension;

[0036] (3) Under the condition of a water bath at 75°C, in the above-mentioned copper acetate-copper oxide mixed suspension, add dropwise successively a sodium hydroxide solution with a concentration of 5 mol / L and hydrazine hydrate with a substance amount of 4 mol, and control the pH value to 11.5, Stirring and reacting for 1-2 hours, standing still, centrifuging, washing the precipitate with absolute ethanol and deionized water, and drying under vacuum at 70°C for 4 hours to obtain a copper oxide-cuprous oxide composite catalyst.

[0...

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Abstract

The invention discloses a preparation method of a copper oxide-cuprous oxide composite catalyst, the preparation method comprises the following steps: (1) adding a certain amount of nano-copper oxidepowder into deionized water and ultrasonically dispersing for 1-3 hours to obtain a copper oxide suspension; (2) adding a cupric acetate solution with a concentration of 0.1-1 mol / L into the copper oxide suspension, stirring evenly, adding a dispersing agent of polyethylene glycol, and ultrasonically dispersing for 20-30 minutes to obtain a cupric acetate-copper oxide mixed suspension; (3) addinga sodium hydroxide solution and a reducing agent dropwise into the cupric acetate-copper oxide mixed suspension under water bath condition at 70-80 DEG C, controlling the pH value within 11-12, stirring and reacting for 1-2 hours, performing standing and centrifugation and separation, washing the precipitate with absolute ethyl alcohol and deionized water separately, and drying for 3-5 hours undervacuum condition at 60-80 DEG C to obtain a copper oxide-cuprous oxide composite catalyst. The preparation process of the copper oxide-cuprous oxide composite catalyst provided by the invention is simple, the reaction condition is mild and easy to control, and the prepared composite catalyst has relatively good catalytic performance.

Description

technical field [0001] The invention relates to the field of material technology, in particular to a method for preparing a copper oxide-cuprous oxide composite catalyst. Background technique [0002] Cuprous oxide is an important P-type semiconductor with a forbidden band width of 2.0-2.2eV. It has strong absorption in the light-absorbing region, and is non-toxic, cheap and easy to prepare. Therefore, it is used in photocatalysis and gas sensors. And solar cells and other fields have good application prospects. However, single cuprous oxide as a photocatalyst is still difficult to meet the requirements of practical applications, and composite photocatalysts can solve many shortcomings of single-component catalysts. Among the different types of cuprous oxide composite photocatalytic materials, the cuprous oxide / cuprous oxide composite photocatalytic material is relatively simple to prepare and the reaction is most easily controlled. [0003] In the prior art, the cuprous o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/72
CPCB01J23/72B01J35/39
Inventor 刘青唐丽华陆磊
Owner 刘青