Preparation method of ultra-fine and ultra-long Au nanowire

A nanowire and ultra-long technology, applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problem that it is difficult to obtain one-dimensional nanowires, and achieve simple and easy process and high purity , the effect of easy operation

Active Publication Date: 2017-11-07
江苏耀兴安全玻璃有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its limitation is that the prerequisite for the preparation of nanowires by template method is to have high-quality nanoscale hole templates. It is difficult to obtain one-dimensional nanowires with ideal aspect ratio

Method used

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  • Preparation method of ultra-fine and ultra-long Au nanowire
  • Preparation method of ultra-fine and ultra-long Au nanowire
  • Preparation method of ultra-fine and ultra-long Au nanowire

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Embodiment 1

[0022] An ultra-fast and macro-preparation method for ultra-fine and ultra-long Au nanowires, comprising the following steps: s

[0023] 1) Preparation of reaction solution: Measure 22mL of a mixed solution of water and ethanol with a volume ratio of 1:1 as a dispersant, add 4mL of 0.5mol L -1 The ethanol solution of 1-naphthol was used as surfactant, reducing agent and shape-directing agent and 4mL 0.05mol L -1 HAuCl 4 As a precursor, shake and mix evenly;

[0024] 2) Preparation of Au nanowires: put the prepared reaction solution in a water bath at 60°C and let it stand for 2 hours. After the reaction, the black product was ultrasonically washed three times with ethanol, and dried in vacuum at room temperature for 6 hours to obtain ultrafine and ultralong nanowires. Au nanowires.

Embodiment 2

[0026] An ultra-fast and macro-preparation method for ultra-fine and ultra-long Au nanowires, comprising the following steps:

[0027] 1) Preparation of reaction solution: Measure 22mL of a mixed solution of water and ethanol with a volume ratio of 1:1 as a dispersant, add 4mL of 0.5mol L -1 The ethanol solution of 1-naphthol was used as surfactant, reducing agent and shape-directing agent and 4mL 0.05mol L -1 AuAc 3 As a precursor, shake and mix evenly;

[0028] 2) Preparation of Au nanowires: put the prepared reaction solution in a water bath at 60°C and let it stand for 2 hours. After the reaction, the black product was ultrasonically washed three times with ethanol, and dried in vacuum at room temperature for 6 hours to obtain ultrafine and ultralong nanowires. Au nanowires.

Embodiment 3

[0030] An ultra-fast and macro-preparation method for ultra-fine and ultra-long Au nanowires, comprising the following steps:

[0031] 1) Preparation of reaction solution: Measure 22mL of a mixed solution of water and ethanol with a volume ratio of 1:1 as a dispersant, add 4mL of 0.5mol L -1 The ethanol solution of 1-naphthol was used as surfactant, reducing agent and shape-directing agent and 4mL 0.05mol L -1 of, KAuBr 4 As a precursor, shake and mix evenly;

[0032] 2) Preparation of Au nanowires: put the prepared reaction solution in a water bath at 60°C and let it stand for 2 hours. After the reaction, the black product was ultrasonically washed three times with ethanol, and dried in vacuum at room temperature for 6 hours to obtain ultrafine and ultralong nanowires. Au nanowires.

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Abstract

The invention discloses an ultra-fast and macro-scale preparation method of an ultra-fine and ultra-long Au nanowire. The method comprises the following steps: taking ethanol and water as a mixed solvent; taking Au salt as a precursor; taking 1-naphthol as a surfactant, a reducing agent and a morphology guiding agent; and after mixing the Au salt and the 1-naphthol with the mixed solvent, carrying out water bath for heat preservation, and obtaining the ultra-fine and ultra-long Au nanowire with a length exceeding 1 micron and a particle size of about 4.5nm. Compared with a traditional preparation method, the method is simple and rapid to operate, the prepared ultra-fine and ultra-long Au nanowire is single in morphology and high in purity, and large-scale production can be realized; and the ultra-fine and ultra-long Au nanowire prepared through the method has the advantages of a large specific surface area, multiple active sites, good flexibility and the like, and has excellent electrocatalytic activity for oxygen reduction.

Description

technical field [0001] The invention relates to a method for preparing ultrafine and ultralong Au nanowires, belonging to the technical field of nanowire preparation. Background technique [0002] In recent years, one-dimensional nanostructures (such as nanowires, ribbons, tubes, and rods) have received extensive attention due to their applications in mesoscopic physics and the fabrication of molecular nanodevices. Metal nanowires have become a hot topic in nanomaterial research in recent years because of their potential applications in electronics, optical devices, and sensors. Looking at the preparation methods of one-dimensional nanowires in the past ten years, they can be roughly divided into the following types: gas-liquid-solid (VLS) growth method, vapor phase growth method (non-VLS mechanism), hydrothermal method, and template method. [0003] Among various synthesis methods of nanostructured materials, vapor-liquid-solid (VLS) is the most commonly used method for sy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24B22F1/00B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00B22F9/24B22F1/0547B22F1/07
Inventor 徐林江娴樊闯付更涛唐亚文孙冬梅
Owner 江苏耀兴安全玻璃有限公司
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