CuO nanosheet as well as preparation method and application thereof from top to bottom

A top-down, nanosheet technology, applied in the field of nanotechnology and electrocatalysis, can solve the problems of complex preparation methods and small output, and achieve the effects of good repeatability, low cost and high electrocatalytic performance

Active Publication Date: 2020-04-07
广东智达伊诺为科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to propose a method for preparing CuO nanosheets by a top-down method and its application in view of the problems of complex preparation methods and small yields in the prior art.

Method used

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  • CuO nanosheet as well as preparation method and application thereof from top to bottom
  • CuO nanosheet as well as preparation method and application thereof from top to bottom
  • CuO nanosheet as well as preparation method and application thereof from top to bottom

Examples

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Embodiment 1

[0037] A top-down preparation method of CuO nanosheets, comprising the following steps:

[0038] (1) Cut 0.25 g of copper foil into small pieces, immerse in acetone solution and ultrasonicate for 30 minutes to degrease the surface. The ultrasonic frequency is 20 kHz. L) soaked and washed for 3 times, taken out, washed with deionized water, and added to a mixed solution of ammonium persulfate and sodium hydroxide with a volume of 50 mL, in the mixed solution of ammonium persulfate and sodium hydroxide, The concentration of ammonium persulfate is 0.134 mol / L, the concentration of sodium hydroxide is 2.66 mol / L, ultrasonic treatment, the ultrasonic frequency of ultrasonic treatment is 20 kHZ, the time of ultrasonic treatment is 1h, filter and get the filtrate, filter the used filter The pore size of the net is 10 mesh, centrifuged at 7000 rpm for 3 minutes, and the precipitate is taken, then washed with deionized water and absolute ethanol for 3 times, and dried to obtain the pre...

Embodiment 2

[0042] A top-down preparation method of CuO nanosheets, comprising the following steps:

[0043](1) Cut 0.25 g of copper foil into small pieces, immerse in acetone solution and ultrasonicate for 30 minutes to degrease the surface. ) for 3 times, take it out, wash it with deionized water, add a volume of 50 mL of ammonium persulfate and sodium hydroxide mixed solution, in the mixed solution of ammonium persulfate and sodium hydroxide, over The concentration of ammonium sulfate is 0.1 mol / L, the concentration of sodium hydroxide is 2.5 mol / L, ultrasonic treatment, the ultrasonic frequency of ultrasonic treatment is 20 kHZ, the time of ultrasonic treatment is 0.5h, filter and get the filtrate, filter the used filter The pore size of the net is 10 mesh, centrifuged at 7000rpm for 3min, and the precipitate is taken, then washed with deionized water and absolute ethanol for 3 times, and dried to obtain the precursor. The drying temperature is 60°C. The drying time is 4h;

[0044] ...

Embodiment 3

[0046] A top-down preparation method of CuO nanosheets, comprising the following steps:

[0047] (1) Cut 0.25 g of copper foil into small pieces, immerse in acetone solution and ultrasonicate for 30 minutes for surface degreasing treatment. Soak and wash in medium for 3 times, take it out, wash with deionized water, add the mixed solution of ammonium persulfate and sodium hydroxide with a volume of 50 mL, in the mixed solution of ammonium persulfate and sodium hydroxide, persulfate The concentration of ammonium is 0.125 mol / L, the concentration of sodium hydroxide is 2.75 mol / L, ultrasonic treatment, the ultrasonic frequency of ultrasonic treatment is 30 kHZ, the time of ultrasonic treatment is 1h, filter and take the filtrate, filter the filter screen used The pore size is 10 mesh, centrifuged at 7000rpm for 3min, the precipitate is taken, and then washed with deionized water and absolute ethanol for 3 times, and dried to obtain the precursor. The drying temperature is 70°C a...

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Abstract

The invention discloses a CuO nanosheet as well as a preparation method and application thereof. CuO nanosheets are prepared from top to bottom, that is to say , CuO with a nano structure is preparedfrom a copper material with a large size through ultrasonic etching and other technologies, and the specific operation method comprises: carrying out oil removal, acid pickling and water washing on the copper raw material, adding the copper raw material into a mixed solution of ammonium persulfate and sodium hydroxide, carrying out ultrasonic treatment, filtering, carrying out centrifugal separation on the filtrate, taking the precipitate, washing and drying to obtain a precursor; and grinding the precursor into powder, heating, and roasting to obtain the CuO nanosheet. The preparation methodprovided by the invention is simple in process and relatively low in cost, and the obtained product is uniform in morphology, good in repeatability and relatively high in electrocatalytic performance.The CuO nanosheet is used as a catalyst for electrocatalytic reduction of carbon dioxide, a reversible hydrogen electrode is used as a standard, the Faraday efficiency of a C<2<+>> product obtained through reduction at-0.97 V exceeds 60%, and high C<2<+>> product selectivity of a CuO electrocatalyst in carbon dioxide reduction is shown.

Description

technical field [0001] The invention belongs to the field of nanotechnology and electrocatalysis, and specifically relates to a CuO nanosheet and its top-down preparation method and application. Background technique [0002] At present, with the large-scale exploitation and use of fossil fuels such as oil and natural gas, the two major global problems of energy crisis and environmental pollution are becoming more and more serious. Excessive carbon dioxide emissions in the atmosphere have caused a series of global problems, such as the greenhouse effect, sea level rise, and land drought. Faced with many energy and environmental problems, it will be an effective solution if carbon dioxide can be converted into the living resources that people need. As a new type of energy conversion technology, electrocatalytic carbon dioxide reduction technology can convert carbon dioxide into high-value fuels such as ethylene, ethanol, and propanol by using electric energy converted from re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90H01M4/88B82Y30/00B82Y40/00
CPCH01M4/9016H01M4/8878H01M4/8882B82Y30/00B82Y40/00Y02E60/50
Inventor 陈光需赵伟伟杜瑞安李正健宾宇良
Owner 广东智达伊诺为科技有限公司
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