Preparation method of pentagram-shaped Au-Cu alloy nanocrystal and product prepared by preparation method

Abstract

The invention discloses a preparation method of an Au-Cu alloy nanocrystal and the Au-Cu alloy nanocrystal prepared by the preparation method, and the pentagram-shaped Au-Cu alloy nanocrystal is synthesized by a mild aqueous-phase synthesis method, is controllable in size, and has pentagonal symmetry. The method is as follows: a CuCl2 aqueous solution, a HAuCl4 aqueous solution and a glucose solution are added into a glass bottle containing hexadecylamine (HDA) and deionized water, the glass bottle is placed on a magnetic stirrer for stirring at room temperature overnight. At this time, each of the reactants in the bottle is evenly dispersed, and is transferred into 100 DEG C oil bath for 30 min of reaction. As the reaction proceeds, the solution turns from yellow green to dark brown, so far, the pentagram-shaped Au-Cu alloy nanocrystal is synthesized, the pentagram-shaped Au-Cu alloy nanocrystal is prepared by the aqueous-phase synthesis method, the system is mild and clean, the experimental operation is simple wide, and the application prospect is wide.

Description

technical field [0001] The invention belongs to the field of synthesis of noble metal nanoparticles, in particular to a method for preparing a pentagram-shaped Au-Cu alloy nanocrystal and a pentagram-shaped Au-Cu alloy nanocrystal prepared therefrom. Background technique [0002] In recent years, the research on bimetallic nanomaterials has attracted more and more researchers' interest. The reason is that the combination of two metals can often show unique properties different from those of single metals. At the same time, the properties of nanomaterials depend on their size and shape. Therefore, it is of great significance to explore how to controllably synthesize bimetallic nanomaterials. Among metals, both Au and Cu have excellent optical and catalytic properties, but the cost of Au is often relatively expensive, and Cu is easily oxidized during use. Therefore, combining Au and Cu can not only reduce the cost of the reactant, but also increase the stability of Cu; and us...

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Problems solved by technology

For example, "Germany Applied Chemistry" (AngewandteChemie International Edition 49.6781-6785, 2010) reported the technology of preparing Au-Cu alloy nanocubes using a diphenyl ether system in one step, but in the preparation process, except for those containing Au and Cu In addition to the precursor, a large number of additives (dodecanethiol, diamond formic acid, 1,2-hexadecaneol, hexadecylamine) are used, and diphenyl ether is used as a solvent, which makes the experiment cost high and environmentally friendly Difference

"German Applied Chemistry" (AngewandteChemie International Edition 122.2979-2983, 2010) reported the reduction of Cu in the Au seed solution in the presence of oleic acid and trioctylamine, and the synthesis of Au-Cu alloy by diffusion. The preparation process The use of high-cost and high-cost organic substances such as oleic acid and trioctylamine, and the reaction needs to be carried out at high temperatures (280-300 ° C), so it is difficult to prepare Au-Cu alloys on a large scale

"Journal of the American Chemical Society" (Journal of the American Chemical Society 133.10325-10327, 2011) reported the use of gas-phase magnetron sputtering to select specific quality Au-Cu alloy nanoclusters, but due to the limitations of the instrument, This physical preparation method has not been popularized, and the shape of the product cannot be well controlled

So far, there has been no literature report on the preparation of uniform and highly branched Au-Cu alloy nanocrystals under mild aqueous conditions.

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