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A method for preparing Cu nanowires with controllable diameter

A technology of nanowires and copper chloride, applied in nanotechnology, metal processing equipment, transportation and packaging, etc., can solve the problems of unsuitable mass production, low sample output rate, high toxicity of hydrazine hydrate, etc., and achieve short preparation cycle, Easy to react and avoid the effect of secondary treatment

Inactive Publication Date: 2020-11-06
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the high toxicity of hydrazine hydrate, this type of method is not suitable for mass production
In addition, the yield rate of samples obtained by this type of method is low, and the product is often accompanied by many particles, which requires a complicated purification process in the later stage

Method used

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  • A method for preparing Cu nanowires with controllable diameter
  • A method for preparing Cu nanowires with controllable diameter
  • A method for preparing Cu nanowires with controllable diameter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1: Preparation 1 of Cu nanowires (300 nanometers in diameter)

[0027] With deionized water as the solvent and copper chloride as the solute, prepare 7.5 ml of copper chloride solution with a concentration of 4 mg / ml; add 1.0 g of cetyl ammonium, heat and stir in a water bath at 100 degrees Celsius for 5 minutes; add a volume of 0.75 Milliliters of hydrochloric acid solution with a concentration of 0.24 mol / liter, and continue to stir; inject 1.5 milliliters of ascorbic acid solution with a concentration of 1.0 mol / liter; stir and heat at 100 degrees Celsius for 20 minutes. The obtained product was separated by a centrifuge, dispersed in n-hexane for ultrasonication, centrifuged for a second time, dispersed in ethanol, centrifuged again, repeated twice, and dried in a 40-degree blast drying oven.

[0028] First, we conducted an X-ray diffraction test on the sample with a working voltage of 40KV and a working current of 40mA. From figure 1 It can be seen tha...

Embodiment 2

[0029] Embodiment 2: Preparation 2 of Cu nanowires (100 nanometers in diameter)

[0030] With deionized water as the solvent and copper chloride as the solute, configure 7.5 ml of copper chloride solution with a concentration of 2 mg / ml; add 0.2 g of cetyl ammonium, place in a water bath at 95 degrees Celsius, heat and stir for 5 minutes; add volume 0.75 milliliters of hydrochloric acid solution with a concentration of 0.24 mol / liter, continue to stir; inject 1.5 milliliters of ascorbic acid solution with a concentration of 1.0 mol / liter; heat and stir at 95 degrees Celsius for 20 minutes. The obtained product was separated by a centrifuge, dispersed in n-hexane for ultrasonication, centrifuged for a second time, dispersed in ethanol, centrifuged again, repeated twice, and dried in a 50-degree blast drying oven.

[0031] From Figure 4 It can be seen that the product obtained in Example 2 hardly contains small particles, and the nanowires have a relatively high yield. From ...

Embodiment 3

[0032] Embodiment 3: Preparation 3 (50-60 nanometers in diameter) of Cu nanowires

[0033] With deionized water as the solvent and copper chloride as the solute, configure 7.5 ml of copper chloride solution with a concentration of 2 mg / ml; add 0.4 g of octadecylamine, heat and stir in a water bath at 96 degrees Celsius for 5 minutes; add a volume of 0.75 mL of hydrochloric acid solution with a concentration of 0.24 mol / liter, and continue to stir; inject 0.75 milliliters of ascorbic acid solution with a concentration of 1.0 mol / liter; heat and stir at 100 degrees Celsius for 20 minutes. The obtained product was separated by a centrifuge, dispersed in n-hexane for ultrasonication, centrifuged for a second time, dispersed in ethanol, centrifuged again, repeated twice, and then placed in a 50-degree blast drying oven for drying. Such as Figure 5 , the Cu nanowires obtained in Example 3 have a diameter of about 50-60 nanometers.

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Abstract

The invention relates to a method for preparing Cu nanowires with controllable diameter, and belongs to the technical field of synthesis methods of metal nanomaterials. The present invention adopts the liquid-phase chemical reduction method, and the preparation process includes: configuring a copper chloride solution as a precursor; adding a surfactant long-chain alkylamine and stirring evenly in an environment at 100-95 degrees Celsius; adding hydrochloric acid solution to reduce the pH value of the reaction environment; adding reduction The reagent ascorbic acid was reacted at a constant temperature, and the samples were obtained by centrifugal washing and drying. In the growth of Cu nanowires: the addition of hydrochloric acid solution can effectively inhibit the formation of nanoparticles in the reduction process, and obtain high-yield Cu nanowires; the long-chain alkylamine assists the Cu nanocrystals along the surface by adsorbing them[100] Direction of growth; non-toxic ascorbic acid as a reducing agent to reduce environmental pollution. The method provided by the invention is simple in operation, environmentally friendly, and low in production cost, and the diameter of the obtained Cu nanowires is controllable without further purification, which provides a necessary premise for the development of non-precious metals.

Description

technical field [0001] The invention belongs to the technical field of metal nanomaterial preparation, and in particular relates to an invention of preparing diameter-controllable Cu nanowires by liquid phase reduction. Background technique [0002] In recent years, electronic technology has sprung up, and one-dimensional metal nanomaterials have been used in the electronics industry due to their unique physical properties and compound properties (Synthesis of metal / bimetal nanowires and their applications as flexible transparent electrodes. Small, 2015, 11(36) :4737-4744.). Among many metal nanomaterials, Cu nanowires have become the most potential development target due to their low cost, high electrical conductivity and thermal conductivity. Studies have shown that the transparent conductive film made of Cu nanowires instead of traditional indium tin oxide can be used in solar cells, electronic touch screens, etc. , 2015, 15(11):7610-7615). Therefore, it has important ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/24B22F1/00B82Y40/00
CPCB82Y40/00B22F9/24B22F1/07
Inventor 刘欣美刘欣栾照辉杜扬隋永明邹勃
Owner HARBIN UNIV OF SCI & TECH