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Simple preparation method of three-dimensional flower-shaped micro-nano copper oxide

A three-dimensional flower-shaped copper oxide technology, applied in the field of copper oxide, can solve the problems of high cost, complicated flower-shaped micro-nano copper oxide, high temperature and high pressure, etc., and achieve the effects of reduced production costs, large surface roughness, and excellent product performance

Inactive Publication Date: 2013-08-14
WUHAN UNIV OF TECH
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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 solve the problems of cumbersome, high temperature, high pressure and high cost in the existing process of preparing flower-shaped micro-nano copper oxide, and to provide a preparation method with easy operation

Method used

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  • Simple preparation method of three-dimensional flower-shaped micro-nano copper oxide
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  • Simple preparation method of three-dimensional flower-shaped micro-nano copper oxide

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preparation example Construction

[0037] (3) Preparation of nano-copper sol:

[0038] The mixture of reducing agent and protective agent is stirred at a speed of 600-1200r / min, and the water bath is kept at a constant temperature of 30-40°C. The copper salt solution is slowly added dropwise into the above-mentioned mixture by using a peristaltic pump, and the mixture is heated at 600-1200r / min. The reaction time is 60-90 minutes under the rotating speed to obtain nano-copper sol.

[0039] (4) Oxidation of nano copper:

[0040] The prepared nano-copper sol is placed in an environment of 0-10° C. for 2-7 days, so that the protective agent is partially analyzed at a low temperature, so that the nano-copper loses its protection and is oxidized into copper oxide particles.

[0041] (5) Growth of copper oxide particles:

[0042] The nano-copper oxide particles obtained by oxidation can aggregate and grow into three-dimensional flower-shaped copper oxide due to their high surface energy and loss of the protection o...

Embodiment 1

[0047] Weigh 0.4542g of reducing agent potassium borohydride and 1.4578g of protecting agent cetyltrimethylammonium bromide, dissolve them in 200ml ultrapure water at room temperature, and prepare a reducing agent solution with a molar concentration of 0.04mol / L And 0.02mol / L protective agent solution. The ratio of reducing agent to protecting agent is 1:0.5. Accurately weigh 0.4994g of copper sulfate pentahydrate, dissolve it in 30ml of ultrapure water at room temperature, and prepare a divalent copper ion solution with a molar concentration of 0.05mol / L. The molar ratio of divalent copper particles to potassium borohydride is 1:4. In a water bath at 30°C, the mixture of potassium borohydride and cetyltrimethylammonium bromide was stirred at a speed of 1200r / min, and the divalent copper particle solution was mixed with a peristaltic pump at a rate of one drop per second. Slowly add it dropwise into the above mixed solution, and react for 60 minutes at a rotating speed of 12...

Embodiment 2

[0049]Weigh 0.4542g of reducing agent potassium borohydride and 2.1867g of protective agent cetyltrimethylammonium bromide, dissolve in 200ml ultrapure water at room temperature, and prepare a reducing agent solution with a molar concentration of 0.04mol / L And 0.03mol / L protective agent solution. The ratio of reducing agent to protecting agent is 1:0.75. Accurately weigh 0.4994g of copper sulfate pentahydrate, dissolve it in 30ml of ultrapure water at room temperature, and prepare a divalent copper ion solution with a molar concentration of 0.05mol / L. The molar ratio of divalent copper particles to potassium borohydride is 1:4. In a water bath at 30°C, the mixture of potassium borohydride and cetyltrimethylammonium bromide was stirred at a speed of 1200r / min, and the divalent copper particle solution was mixed with a peristaltic pump at a rate of one drop per second. Slowly add it dropwise into the above mixed solution, and react for 60 minutes at a rotating speed of 1200r / m...

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Abstract

The invention relates to a simple preparation method of three-dimensional flower-shaped micro-nano copper oxide. The method comprises the following steps of: (1) preparing nano-copper sol: reducing copper salt in an aqueous solution at normal temperature to prepare the nano-copper sol, wherein potassium borohydride serves as a reducing agent and hexadecyl trimethyl ammonium bromide serves as a protective agent; (2) oxidizing nano-copper: standing at a lower temperature for a period of time, so that the nano-copper particles are completely oxidized into copper oxide particles; and (3) ageing and growing the nanometer copper oxide: regularly growing the nanometer copper oxide particles in a gathering mode into three-dimensional flower-shaped copper oxide at a low temperature. According to the invention, the simple, convenient and low-cost preparation method of the three-dimensional flower-shaped micro-nano copper oxide is implemented, and the high-temperature and high-pressure conditions required by the traditional preparation method of the material are overcome; and the prepared copper oxide material has the characteristics of novel structure, uniform appearance and size, high surface roughness and the like, and is suitable for serving as a catalyst, a gas sensitive material and the like.

Description

technical field [0001] The invention relates to copper oxide, in particular to a simple preparation method of three-dimensional flower-shaped micro-nano copper oxide. Background technique [0002] With people's attention to increasingly prominent environmental problems, modern environmental protection technology has developed rapidly. High-performance gas-sensing materials and catalytic materials have important applications in the fields of air quality detection, air purification, and pollutant degradation. Copper oxide is an important transition metal oxide with a band gap of 1.2eV. It is a typical P-type semiconductor material that can be excited under visible light and has good catalytic and gas-sensing properties. A large number of literatures have shown that factors such as the shape and size of materials have a great impact on their various properties. Traditionally prepared copper oxide is generally spherical, ribbon-shaped, linear, cubic, octahedral and other struc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G3/02B82Y30/00
Inventor 李美娟项坤罗国强陈程沈强张联盟
Owner WUHAN UNIV OF TECH
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