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Method for preparing copper nanocubes

A cube and copper nanotechnology, applied in the direction of nanotechnology, can solve the problems of uneven particle size control, long reaction time, poor repeatability, etc., and achieve the effect of uniform shape, high repeatability, and high yield

Inactive Publication Date: 2019-06-25
黄帅
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, these methods have some disadvantages, such as long reaction time, non-uniform particle size control, low yield and poor reproducibility.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Step 1: Add 5mL ethylene glycol into a 50mL three-necked flask, heat it to 150°C with an oil bath, and keep the temperature constant at 150°C, then add 0.06mL 3mM sodium hydrosulfide ethylene glycol solution, 0.5mL 3mM HCl Glycol solution, 1.25mL 20mg / mL PVP ethylene glycol solution and 0.4mL 200mM copper trifluoroacetate ethylene glycol solution. The extent of the reaction was monitored by UV-visible absorption spectrum. When the UV-visible absorption peak appeared near 350 nm and 435 nm, the flask was taken out and immersed in an ice-water bath to terminate the reaction. After repeated centrifugal washing with ethanol and water, the nano-seeds Dispersed and stored in water, the concentration of copper seeds is 9×10 20 cells / mL, with an average side length of 35 nm;

[0020] Step 2: Add 1.25mL of ethylene glycol into a 10mL beaker, heat it to 150 ℃ with an oil bath, then add 0.3mL of 20mg / mL PVP ethylene glycol solution, 200μL of copper with an average side length of ...

Embodiment 2

[0022] Add 1.25mL of ethylene glycol into a 10mL beaker and heat to 150°C with an oil bath. Then add 0.3 mL of 20 mg / mL PVP ethylene glycol solution, 100 μL of copper nanocube seeds with an average side length of 35 nm prepared in the first step of Example 1 and 100 μL of 200 mM copper nitrate in ethylene glycol solution, and the reaction was carried out for 3 h. Take it out and immerse it in an ice-water bath to terminate the reaction, and obtain copper nanocubes with an average side length of 56 nm, wash them repeatedly with ethanol and water, and then disperse them in water for storage.

Embodiment 3

[0024] Step 1: Add 5mL of ethylene glycol into a 50mL three-neck flask, heat it to 150°C with an oil bath, and keep the temperature constant at 150°C. Then add 0.06mL 3mM potassium sulfide ethylene glycol solution, 0.5mL 3 mM HCl ethylene glycol solution, 1.25mL 20mg / mL PVP ethylene glycol solution and 0.4mL 200mM copper trifluoroacetate ethylene glycol solution, and use UV-visible absorption The extent of the reaction is monitored by spectroscopy. When the ultraviolet-visible absorption peaks appear around 350 nm and 435 nm, the flask is taken out and immersed in an ice-water bath to terminate the reaction. After repeated centrifugation and washing with ethanol and water for several times, the nano-seeds are dispersed in water for storage , the concentration of copper seeds is 9х10 20 cells / mL, with an average side length of 35 nm;

[0025] Step 2: Add 1.25mL ethylene glycol into a 10mL beaker, heat it to 150°C with an oil bath, then add 0.3mL 20mg / mL PVP ethylene glycol sol...

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PUM

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Abstract

The invention relates to a method for preparing copper nanocubes. A seeding growth method is used for preparing copper nanocubes of different side lengths; firstly, ethylene glycol is used as a solvent and reducing agent, PVP as a stabilizer, copper trifluoroacetate as a copper source, and hydrochloric acid and soluble sulfide salt as auxiliary agents to prepare copper cube seeds with an average side length of 35 nm; the ethylene glycol is used as the solvent and reducing agent, the PVP as the stabilizer, and the soluble copper salt as the copper source to obtain copper nanocubes with an average side length of 40 to 160 nm by controlling the relative using amount of seeds and copper salt. According to the method for preparing the copper nanocubes, operation is simple, the process is controllable, and stability of the obtained copper nanocubes is high, the method for preparing the copper nanocubes is an efficient copper nanocube synthesizing method and thus has broad market prospect.

Description

technical field [0001] The invention relates to the technical field of nanometer functional materials, in particular to a method for preparing copper nanocubes. Background technique [0002] Copper nanomaterials have unique optical properties, electrical properties, catalytic properties, and excellent sensing and biological detection capabilities, so copper nanomaterials with various morphologies have been extensively studied. Compared with spherical, rice-shaped, rod-shaped, ribbon-shaped, and linear shapes, cubic copper nanoparticles have attracted the most attention. Cu nanocubes with sharp edges and uniform morphology can be used as highly sensitive localized plasmon sensing and surface-enhanced Raman substrates. Moreover, copper nanocubes can be used as sacrificial templates for the synthesis of cubic structures of various metals, such as Cu, Pb, Pt, and Au. [0003] At present, people have developed a variety of methods for preparing copper nanocubes, such as polyhyd...

Claims

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Application Information

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IPC IPC(8): B22F1/00B22F9/24B82Y40/00
Inventor 黄帅
Owner 黄帅
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