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A zinc oxide nanosheet with oxygen-rich vacancies, preparation method and application thereof

A zinc oxide nanometer and vacancy technology, which is applied in chemical instruments and methods, catalyst activation/preparation, metal/metal oxide/metal hydroxide catalysts, etc., can solve unrealized problems and achieve good stability and catalytic activity and its high selectivity and easy synthesis in large quantities

Active Publication Date: 2021-07-27
INST OF ADVANCED TECH UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Such work is mostly based on light energy or thermal energy to drive carbon dioxide conversion. However, at present, the method of introducing oxygen vacancies into metal oxides has not been realized in the electrochemical reduction of carbon dioxide.

Method used

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  • A zinc oxide nanosheet with oxygen-rich vacancies, preparation method and application thereof
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  • A zinc oxide nanosheet with oxygen-rich vacancies, preparation method and application thereof

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Embodiment 1

[0027] The present invention proposes zinc oxide nanosheets rich in oxygen vacancies, the average size of which is 1 micron.

[0028] The present invention also proposes a method for preparing zinc oxide nanosheets with oxygen-rich vacancies, comprising the following steps: placing the zinc oxide nanosheets in a hydrogen plasma atmosphere for etching to obtain the zinc oxide with oxygen-rich vacancies Nanosheets.

Embodiment 2

[0030] The present invention proposes a zinc oxide nanosheet rich in oxygen vacancies, the average size of which is 800 nanometers.

[0031] The present invention also proposes a method for preparing zinc oxide nanosheets with oxygen-rich vacancies, comprising the following steps: placing the zinc oxide nanosheets in a hydrogen plasma atmosphere for etching to obtain the zinc oxide with oxygen-rich vacancies Nanosheets;

[0032] Wherein, the zinc oxide nanosheets are prepared according to the following process: dissolving zinc nitrate hexahydrate and hexamethylenetetramine in water to obtain a mixed solution, adding an organic solution of a surfactant to the mixed solution, and stirring at 55° C. The reaction was carried out for 100 minutes, cooled after the reaction, centrifuged, washed, dried, and then calcined in the air to obtain the zinc oxide nanosheets; wherein, in the mixed solution, the concentrations of zinc nitrate hexahydrate and hexamethylenetetramine were equal t...

Embodiment 3

[0034] The oxygen-vacancy-rich zinc oxide nanosheets proposed by the present invention have an average size of 900 nanometers and an average thickness of 15 nanometers.

[0035] The present invention also proposes a method for preparing zinc oxide nanosheets with oxygen-rich vacancies, comprising the following steps: placing the zinc oxide nanosheets in a hydrogen plasma atmosphere for etching to obtain the zinc oxide with oxygen-rich vacancies Nanosheets;

[0036] Wherein, the zinc oxide nanosheets are prepared according to the following process: dissolving zinc nitrate hexahydrate and hexamethylenetetramine in water to obtain a mixed solution, adding an organic solution of a surfactant to the mixed solution, and stirring at 65° C. The reaction was carried out for 80 minutes, cooled after the reaction, centrifuged, washed, dried, and then calcined in the air to obtain the zinc oxide nanosheets; wherein, in the mixed solution, the concentrations of zinc nitrate hexahydrate and...

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Abstract

The invention discloses a zinc oxide nanosheet with oxygen-rich vacancies, the average size of which is 800 nanometers to 1 micron; the invention also discloses a preparation method for the zinc oxide nanosheet with oxygen-rich vacancies, comprising: zinc oxide nanosheets The chips were etched in a hydrogen plasma atmosphere. The present invention also proposes an application of the oxygen-vacancy-rich zinc oxide nanosheets in carbon dioxide electroreduction to prepare carbon monoxide. The preparation method of zinc oxide nanosheets rich in oxygen vacancies proposed by the present invention has low cost and is easy to be synthesized in large quantities. The surface electronic state of zinc oxide nanosheets is improved by introducing oxygen vacancies, and the obtained zinc oxide nanosheets rich in oxygen vacancies are used for In the carbon dioxide electroreduction reaction, the catalytic activity and selectivity are high, and the stability is good.

Description

technical field [0001] The invention relates to the technical field of catalysts, in particular to a zinc oxide nanosheet rich in oxygen vacancies, a preparation method and an application thereof. Background technique [0002] In the chemical industry, carbon dioxide is an abundant and cheap carbon resource. Converting carbon dioxide into fuels and high value-added chemicals through electrochemical processes is of great significance for alleviating the energy crisis. Since CO2 is very stable, efficient activation of CO2 plays a key role in its electrochemical reduction process. In recent years, the introduction of oxygen vacancies in metal oxide catalysts is an effective way to promote the activation of carbon dioxide. For example, it is easier to activate the C=O bond after introducing oxygen vacancies on the surface of titanium dioxide, so that the dissociation energy barrier of carbon dioxide is reduced to 22.2 kcal / mol (J. Phys. Chem. C2016, 120, 21659-21669). Bismuth ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/06B01J35/02B01J37/34C25B1/23C25B11/077B01J35/00
CPCC25B1/00C25B11/04B01J23/06B01J37/349B01J35/33B01J35/00B01J35/30
Inventor 孔祥栋刘彦耿志刚刘仲禹曾杰
Owner INST OF ADVANCED TECH UNIV OF SCI & TECH OF CHINA