Method for preparing copper nanowires through oil-phase chemical reduction

Abstract

The invention discloses a method for preparing copper nanowires through oil-phase chemical reduction. The method comprises: mixing a reducing organic solvent, a cationic surfactant, an inorganic salt catalyst and a copper source together to obtain a mixed liquid A; under the condition of protection with an inert atmosphere, heating the mixed liquid A at a temperature ranging from 40 to 100 DEG C and stirring until all solid reagents are completely dissolved to obtain a solution B; increasing a temperature of the solution B to the range of 170-200 DEG C and preserving heat, thereby obtaining a suspension C; and naturally cooling the suspension C to a room temperature, centrifuging, taking precipitate at the bottom for centrifugal washing by using an organic solvent, and obtaining red precipitate after washing, namely the copper nanowires. The method is simple and easy to implement; the copper nanowires prepared are regular in line form and uniform in dimension; the copper nanowires are made out of elementary substance copper without other impurities, and have diameters ranging from 15 to 35nm and lengths ranging from 5 to 20 microns; besides, the copper nanowires are controllable in morphology and thus are an excellent one-dimensional material.

Description

technical field [0001] The present invention relates to the field of materials. More specifically, it relates to a method for preparing copper nanowires and oil phase chemical reduction. Background technique [0002] In recent years, one-dimensional nanostructures have attracted extensive attention due to their unique optical, electrical, and magnetic properties, especially in the fields of electronics, atom probes, optical devices, transparent conductive materials, and sensors. On the one hand, copper nanowires have high electrical conductivity, and unique mechanical, optical and other physical phenomena will play an extremely important role in future applications; Qingyi. [0003] At present, the methods for synthesizing copper nanowires mainly include template-assisted synthesis, direct vapor deposition, and solution methods. Template-assisted synthesis is a common method for synthesizing copper nanowires due to its simple device, easy operation, and controllable morph...

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Problems solved by technology

However, the post-treatment process of copper nanowires synthesized from templates is cumbersome, and it is often necessary to remove the templates with strong acid, strong alkali or other organic solvents.

The direct vapor deposition method is to form gas-phase reactants through various physical or chemical means, and then directly deposit the formed gas-phase reactants on a specific substrate to form a one-dimensional nanowire structure. Although the process is simple, this method needs to be processed under high temperature conditions. conduct

The solution synthesis of copper nanowires usually uses alkali or acid as the reducing agent. The reaction conditions are relatively harsh and difficult to promote. The solvent used is water. The prepared nanowires cluster together and are difficult to disperse. This brings great challenges to its subsequent application. great difficulty

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