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Photoinduced copper ion metal nanocrystallization method

A technology of metal nano and copper ions, which is applied in the field of preparation of metal ultrafine particles, can solve the problems of complicated process, unfriendly environment and high preparation cost, and achieve the effect of simple preparation process, high stability and low material cost

Inactive Publication Date: 2012-07-04
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the defects of the existing process such as high preparation cost, complex process, and unfriendly environment, the present invention discloses a nano-copper preparation process, which does not have or at least partly overcomes the above-mentioned shortcomings, and the obtained copper powder particles are uniform and the particle size is controllable

Method used

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  • Photoinduced copper ion metal nanocrystallization method
  • Photoinduced copper ion metal nanocrystallization method
  • Photoinduced copper ion metal nanocrystallization method

Examples

Experimental program
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Effect test

Embodiment 1

[0034] Under the condition of avoiding light, dissolve 0.02 g of copper chloride, 0.046 g of ethanolamine, and 0.03 g of photoinitiator 1173 (2-hydroxy-2-methyl-1-phenylacetone) in 2 g of ethanol, and mix them uniformly by ultrasonic. The resulting solution was poured into a groove made of polytetrafluoroethylene, filled with nitrogen and sealed with a light-transmitting polyester film. Irradiate with a 365nm wavelength LED surface light source at room temperature for 1.5 minutes to obtain purple metal bright metal copper powder, which is characterized by X-ray diffraction (XRD), and the product is high-purity elemental copper. figure 1 Scanning electron micrographs of the product. It can be seen from the electron microscope photos that the prepared copper particles have a size of 10-20nm and are very uniform in size. figure 2 X-ray diffraction pattern of copper. According to card PDF 00-001-1242, 2 ? =43.55° is the (111) crystal plane of copper, 2 ? =50.66° is the (200) ...

Embodiment 2

[0036] Under the condition of avoiding light, dissolve 0.02 g of copper chloride, 0.046 g of ethanolamine, and 0.03 g of photoinitiator 1173 (2-hydroxy-2-methyl-1-phenylacetone) in 2 g of ethanol, and mix them uniformly by ultrasonic. The resulting solution was poured into a groove made of polytetrafluoroethylene, filled with nitrogen and sealed with a light-transmitting polyester film. Irradiate with an LED surface light source with a wavelength of 365nm for 2 minutes at room temperature to obtain a bright purple metallic copper powder, which is analyzed by an X-ray diffractometer to be metallic copper. image 3 and 4 It is a scanning electron microscope photo of the product. It can be seen that the size of the prepared copper particles is about 80nm, and the size is very uniform.

Embodiment 3

[0038] Under the condition of avoiding light, dissolve 0.03 g of copper nitrate, 0.1 g of diethanolamine, and 0.06 g of photoinitiator ITX (isopropylthioxanthone) in 3 g of ethanol, and mix them uniformly by ultrasonic. The resulting solution was poured into a well made of polytetrafluoroethylene, filled with nitrogen gas, and covered with a glass slide. Control the temperature at 30°C and irradiate for 3 minutes with an ultraviolet light source with a wavelength of 380nm to obtain a bright purple metal copper powder, which is analyzed by an X-ray diffractometer as a simple metal copper. . Figure 5 and 6It is a scanning electron microscope photo of the product, and the obtained copper particle size is about 100nm.

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Abstract

The invention discloses a photoinduced copper ion metal nanocrystallization method. Under a photophobic condition, copper salt, photoinitiator and additive are fully dissolved by solvent and mixed uniformly to prepare a reaction solution system; and then the reaction solution system is injected into a light transmission container, radiated by a light source with the absorption wavelength being corresponding to that of the photoinitiator to generate metal copper nano particles. A preparation process is simple, the material cost is low, high-purity and non-impurity metal copper nano particles can be obtained, the stability of the reaction system is high when the reaction system is photophobic, the immediate starting and immediate stopping of the reaction are realized by controlling the on and the off of the light source, and the sizes of the particles are controlled by adjusting the reaction time.

Description

technical field [0001] The invention relates to a preparation process of metal ultrafine particles, in particular to a method for preparing copper nanoparticles by photoreduction. Background technique [0002] Due to the characteristics of small size, large specific surface area, small electrical resistance, quantum size effect and macroscopic quantum tunneling effect of nano-copper powder, the preparation, performance and application research of nano-copper powder has received extensive attention at home and abroad. [0003] At present, most of the preparation of nano-copper powder is still in the exploratory stage, and there are many deficiencies, such as: the copper powder prepared by the ball milling method has a wide particle size distribution and is easy to introduce impurities, the cost of the combined method of γ-ray irradiation-hydrothermal crystallization is high, and the chemical reduction method The reducing agents used in the method such as formaldehyde, ascorbi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24
Inventor 聂俊朱晓群
Owner BEIJING UNIV OF CHEM TECH
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