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Method for preparing chain-link-shaped gold nanowire through electrochemical method

A gold nanowire and electrochemical technology, which is applied in the field of electrochemical preparation of chain-shaped gold nanowires, can solve the problems of difficult control of the morphology of gold nanowires, environmental poisoning, complicated process, etc., and achieves easy product separation and less impurities. , The effect of the simple process

Pending Publication Date: 2020-10-16
JIANGXI AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the morphology of gold nanowires synthesized at home and abroad is difficult to control. The principle is mainly to reduce gold chloride by adding chemical reducing agents, and these chemical reagents are easy to cause poisonous effects on the environment, and the traditional process is relatively complicated overall.

Method used

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  • Method for preparing chain-link-shaped gold nanowire through electrochemical method
  • Method for preparing chain-link-shaped gold nanowire through electrochemical method
  • Method for preparing chain-link-shaped gold nanowire through electrochemical method

Examples

Experimental program
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Effect test

Embodiment 1

[0025] Embodiment 1 prepares spherical gold nanoparticles

[0026] Containing a certain amount of polyethylene glycol, sodium carboxymethylcellulose, sodium lauryl sulfate and chloroauric acid (HAuCl 4 ) to form a mixed solution, then place the mixed solution in a reaction tank, heat to 40°C, and perform a reduction reaction for 3 hours. The final concentration of each component in the mixed solution is: polyethylene glycol 3g / L, sodium carboxymethyl cellulose (CMC) 1.5g / L, sodium lauryl sulfate 3g / L, chloroauric acid (HAuCl 4 )1mol / L;

[0027] After the reduction reaction is completed, the reaction solution is centrifuged at 12,000 r / min in a high-speed centrifuge to separate the product, and finally the product precipitate is washed three times with water to obtain spherical gold nanoparticles.

Embodiment 2

[0028] Example 2 Preparation of chain-link gold nanowires 1

[0029] Containing a certain amount of polyethylene glycol, sodium carboxymethylcellulose, sodium lauryl sulfate and chloroauric acid (HAuCl 4 ) to form a mixed solution, and then place the mixed solution in a reaction tank, heat it to 40°C, and perform a reduction reaction for 3 hours at a DC voltage of 1.5V (0.5A). The final concentration of each component in the mixed solution is: polyethylene glycol Alcohol 2g / L, sodium carboxymethylcellulose (CMC) 0.5g / L, sodium lauryl sulfate 2g / L, chloroauric acid (HAuCl 4 )0.5mol / L;

[0030] After the reduction reaction is completed, the reaction solution is centrifuged at 10,000 r / min in a high-speed centrifuge to separate the product, and finally the precipitated product is washed three times with water to obtain chain-link gold nanowires 1 .

Embodiment 3

[0031] Example 3 Preparation of chain-link gold nanowires 2

[0032] Containing a certain amount of polyethylene glycol, sodium carboxymethylcellulose, sodium lauryl sulfate and chloroauric acid (HAuCl 4 ) to form a mixed solution, and then place the mixed solution in a reaction tank, heat it to 40°C, and perform a reduction reaction for 3 hours at a DC voltage of 10V (0.5A). The final concentration of each component in the mixed solution is: polyethylene glycol 2g / L, sodium carboxymethylcellulose (CMC) 0.5g / L, sodium lauryl sulfate 2g / L, chloroauric acid (HAuCl 4 )0.2mol / L;

[0033] After the reduction reaction is completed, the reaction solution is centrifuged at 10,000 r / min in a high-speed centrifuge to separate the product, and finally the precipitated product is washed three times with water to obtain chain-link gold nanowires 2 .

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Abstract

The invention discloses a method for preparing a chain-link-shaped gold nanowire through an electrochemical method. The method is characterized in that polyethylene glycol, sodium carboxymethylcellulose and lauryl sodium sulfate form a soft template, chloroauric acid serves as a raw material, the chloroauric acid is reduced by controlling direct-current voltage and the soft template at the temperature of 40 DEG C, a reaction product is washed with clear water after being centrifugally separated, and the chain-link-shaped gold nanowire is obtained. The method directly and electrochemically synthesizes the chain-link-shaped gold nanowire in one step, has the characteristics of simplicity and convenience in operation and easiness in product separation, abandons a conventional reducing agent in thermochemical synthesis of a gold nano material, and is green, environment-protecting, easiness in separation and simplicity and convenience in operation.

Description

technical field [0001] The invention relates to the technical field of nanoparticle preparation, in particular to a method for electrochemically preparing chain-link gold nanowires. Background technique [0002] Gold is one of the most stable elements in chemical properties, but nano-scale gold particles do have special physical and chemical properties, such as high electron density, dielectric properties and catalytic effect, and can be used in various disciplines such as medicine and food environment. Due to the special shape and optical properties of gold nanowires, it is widely used in catalysis, optoelectronic devices and biomedicine, especially in molecular labeling, chemical sensing, nanoelectronic devices and other aspects. At present, the morphology of gold nanowires synthesized at home and abroad is difficult to control. The principle is mainly to reduce gold chloride by adding chemical reducing agents, and these chemical reagents are easy to cause poisonous effect...

Claims

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Application Information

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IPC IPC(8): C25C5/02B22F1/00B82Y40/00
CPCC25C5/02B82Y40/00B22F1/0547B22F1/14
Inventor 王纯荣谭智美吴国强洪艳平颜贤仔余莉莉
Owner JIANGXI AGRICULTURAL UNIVERSITY
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