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Preparation method of cuprous oxide nanocrystals

A technology of cuprous oxide and nanocrystals, applied in the direction of copper oxide/copper hydroxide, etc., to achieve the effects of mild and controllable conditions, cheap and easy-to-obtain raw materials, and good catalytic activity

Inactive Publication Date: 2018-02-23
SUZHOU RES INST LANZHOU INST OF CHEM PHYSICS CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, so far, the reported cuprous oxide grains exposed with high-index crystal faces are all crystallites larger than 1 μm

Method used

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  • Preparation method of cuprous oxide nanocrystals
  • Preparation method of cuprous oxide nanocrystals

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Dissolve 1 mL of aqueous copper sulfate solution with a concentration of 0.01 mol / L in a mixed solution of 10 mL of water and 0.5 mL of oleic acid, stir well and add 1 mL of aqueous sodium hydroxide solution with a concentration of 0.1 mol / L, then heat the reaction solution to 50 ℃. After the temperature stabilized, 1 mL of a 0.01 mol / L sodium ascorbate aqueous solution was added, followed by continuous stirring for 1 hour. After the reaction, the reaction solution was centrifuged at 8000 rpm, and the separated solid was washed with a mixed solvent of ethanol and cyclohexane, and the washing process was repeated three times. Finally, the solid obtained by centrifugation was vacuum-dried at room temperature to obtain orange oxide Cuprous powder.

[0026] figure 1 It is the XRD pattern of the cuprous oxide grains obtained in Example 1, which is consistent with the standard XRD pattern of cuprous oxide, proving that the obtained in Example 1 is cuprous oxide.

[0027] ...

Embodiment 2

[0029] Dissolve 1 mL of copper acetate aqueous solution with a concentration of 0.1 mol / L in a mixed solution of 10 mL of water and 0.5 mL of oleic acid, stir well, add 1 mL of aqueous potassium hydroxide solution with a concentration of 1 mol / L, and then heat the reaction solution to 60°C . After the temperature stabilized, 1 mL of 0.1 mol / L ascorbic acid aqueous solution was added, followed by continuous stirring for 2 hours. After the reaction, the reaction solution was centrifuged at 8000 rpm, and the separated solid was washed with a mixed solvent of ethanol and cyclohexane, and the washing process was repeated three times. Finally, the solid obtained by centrifugation was vacuum-dried at room temperature to obtain orange oxide Cuprous powder.

[0030] The obtained orange cuprous oxide was characterized by XRD and XRD, and the characterization result was similar to that of Example 1.

Embodiment 3

[0032] Dissolve 1 mL of a mixed aqueous solution of copper acetate and copper sulfate with a concentration of 0.5 mol / L in a mixed solution of 10 mL of water and 0.5 mL of oleic acid, stir well and add 1 mL of potassium hydroxide and sodium hydroxide with a concentration of 0.5 mol / L to mix aqueous solution, and then the reaction solution was heated to 56°C. After the temperature stabilized, 1 mL of a mixed aqueous solution of 0.6 mol / L ascorbic acid and sodium ascorbate was added, followed by continuous stirring for 1.5 hours. After the reaction, the reaction solution was centrifuged at 8000 rpm, and the separated solid was washed with a mixed solvent of ethanol and cyclohexane, and the washing process was repeated three times. Finally, the solid obtained by centrifugation was vacuum-dried at room temperature to obtain orange oxide Cuprous powder.

[0033] The obtained orange cuprous oxide was characterized by XRD and XRD, and the characterization result was similar to that ...

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Abstract

The invention provides a preparation method of cuprous oxide nanocrystals. The preparation method comprises the following steps: step one, dissolving a copper saline solution into a mixed solution ofwater and oleic acid; step two, adding an alkaline solution into a solution obtained in the step one, uniformly stirring, heating and keeping warm; step three, adding a reducing agent into a solutionobtained in the step two, and continuing to stir until obtaining a cuprous oxide crude product through reacting; step four, washing the cuprous oxide crude product obtained in the step three, and carrying out vacuum drying, thus obtaining the cuprous oxide nanocrystals. According to the preparation method provided by the invention, raw materials are cheap and easy to obtain, the technology is simple, conditions are mild and controllable, and the environment is not polluted; above all, the compounded cuprous oxide nanocrystals have the characteristics of small particle size (being smaller than1 mu m) and more exposure surface high-index crystal planes and have better catalytic activity.

Description

technical field [0001] The invention belongs to the technical field of inorganic chemical synthesis, and in particular relates to a method for preparing cuprous oxide nanocrystals. Background technique [0002] Cuprous oxide is an important p-type semiconductor material, which is widely used in the field of catalysis because of its special properties. It is well known that cuprous oxide with different surface structures will lead to changes in its catalytic properties, especially cuprous oxide with exposed high-index crystal faces, which exhibits special catalytic properties due to the high-index crystal faces containing a large number of coordinatively unsaturated atoms. nature. Recently, cuprous oxides containing {311}, {522}, {332} and other high-index crystal faces were synthesized and showed enhanced catalytic activity in catalytic reactions such as carbon monoxide oxidation and visible light degradation of organic dyes. [0003] However, so far, the reported cuprous ...

Claims

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Application Information

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IPC IPC(8): C01G3/02
CPCC01G3/02C01P2002/72C01P2004/03C01P2004/41C01P2004/62
Inventor 李福伟赵泽伦王雪夏春谷司家奇龙向东
Owner SUZHOU RES INST LANZHOU INST OF CHEM PHYSICS CHINESE ACADEMY OF SCI
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