Cuprous oxide nanocrystalline with adjustable morphology and dimension as well as preparation method and application thereof

A technology of cuprous oxide and nanocrystals, which is applied in the field of nanomaterials, can solve the problems of iron impurities, and achieve the effect of green raw materials, mild conditions, and simple reaction steps

Active Publication Date: 2017-12-15
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Patent 201280047817.3 discloses a method for preparing cuprous oxide using copper hydroxide as a precursor, but this method needs to control the size of cuprous oxide particles by adding ferrous ions, which will lead to a certain amount of iron in the final product Impurities

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  • Cuprous oxide nanocrystalline with adjustable morphology and dimension as well as preparation method and application thereof
  • Cuprous oxide nanocrystalline with adjustable morphology and dimension as well as preparation method and application thereof
  • Cuprous oxide nanocrystalline with adjustable morphology and dimension as well as preparation method and application thereof

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Embodiment 1

[0043] 1) Preparation of copper hydroxide precursor: Add 1.7048g of copper chloride dihydrate into a 150mL single-mouth bottle, and stir and dissolve with 80mL of deionized water. The molar concentration of copper chloride dihydrate is 0.1M. After the solution turns blue and clear, add 20 mL of 2M sodium hydroxide solution dropwise at a rate of 4 mL / min, continue stirring for 30 minutes, and centrifuge at 10,000 r / min to obtain a dark blue suspension. Wherein, the molar ratio of divalent copper ions to hydroxide ions is 1:4.

[0044] 2) Preparation of copper hydroxide dispersion system: Wash the above dark blue suspension once with deionized water, and then redisperse it in 100 mL of deionized water. At this time, the pH value of the dispersion system is 11.8.

[0045] 3) Reduction reaction: under stirring, add 20 mL of 1M ascorbic acid aqueous solution dropwise at a rate of 2 mL / min to the dispersion system, stir at room temperature and continue the reaction for 1 hour, centr...

Embodiment 2

[0048] 1) Preparation of copper hydroxide precursor: Add 0.1600 g of anhydrous copper sulfate into a 25 mL single-mouth bottle, and stir and dissolve with 8 mL of deionized water. The molar concentration of anhydrous copper sulfate is 0.1M. After the solution turns blue and clear, add 2mL of 2M sodium hydroxide solution dropwise at a rate of 0.2mL / min, continue stirring for 60 minutes, and centrifuge at 10000r / min to obtain a dark blue suspension. Wherein, the molar ratio of divalent copper ions to hydroxide ions is 1:4.

[0049] 2) Preparation of copper hydroxide dispersion system: wash the above dark blue suspension once with deionized water, and then redisperse in 10 mL of deionized water to form a dispersion system. Afterwards, 1 mL of 2M NaOH solution was added to adjust the pH of the dispersion to 12.6.

[0050] 3) Reduction reaction: under stirring, add 2.5mL of 0.2M reducing agent ascorbic acid aqueous solution dropwise at a rate of 0.1mL / min to the copper hydroxide d...

Embodiment 3

[0052] 1) Preparation of copper hydroxide precursor: Add 1.1254g of anhydrous copper nitrate into a 100mL single-mouth bottle, and stir and dissolve with 54mL of deionized water. The molar concentration of anhydrous copper nitrate is 0.1M. After the solution turns blue and clear, add 6 mL of 4M sodium hydroxide solution dropwise at a rate of 0.3 mL / min, continue stirring for 30 minutes, and centrifuge at 10,000 r / min to obtain a dark blue suspension. Wherein, the molar ratio of divalent copper ions to hydroxide ions is 1:4.

[0053] 2) Preparation of copper hydroxide dispersion system: wash the above dark blue suspension with deionized water once, and then redisperse in 60mL deionized water to obtain a dispersion system; under stirring, add 6mL 0.1M hydrochloric acid to adjust the pH value of the dispersion system to 10.6.

[0054] 3) Reduction reaction: under stirring, add 12mL of 0.25M ascorbic acid aqueous solution dropwise to the dispersion system at a rate of 1mL / min, an...

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Abstract

The invention discloses a cuprous oxide nanocrystalline with adjustable morphology and dimension as well as a preparation method and an application thereof. The preparation method comprises the following steps: copper hydroxide which is used as a precursor is synthesized; the pH value of the system is regulated; the system whose pH value is regulated is reduced in order to obtain cuprous oxide nanocrystalline. A surfactant is not needed to add, the cuprous oxide nanocrystalline with specific morphology and dimension can be obtained by adjusting the pH value of the reaction system, and the nanocrystalline can be used for photocatalytic degradation of organic pollutants, and the method is a rapid, simple and green preparation method of cuprous oxide nanocrystalline.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials, and in particular relates to a cuprous oxide nanocrystal with controllable shape and size, a preparation method thereof, and an application in the field of photocatalysis. Background technique [0002] Water pollution is increasingly becoming a prominent environmental problem, therefore, researchers are devoting themselves to developing cost-effective water treatment methods. Among them, the photocatalytic method is a promising means to degrade organic pollutants in water due to its low energy consumption, simple operation and mild conditions. As an important semiconductor material, cuprous oxide has a band gap of 2.17eV, which can generate highly active hole-electron pairs under visible light irradiation, generate active free radicals, and degrade organic pollutants. Studies have shown that the photocatalytic performance of cuprous oxide is closely related to its microscopic shape, size a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G3/02B82Y40/00B01J23/72
CPCB01J23/72C01G3/02C01P2002/72C01P2004/03C01P2004/04C01P2004/62C01P2004/64
Inventor 蔡超朱唐赵宁徐坚
Owner INST OF CHEM CHINESE ACAD OF SCI
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