CN-121988734-A - Method for preparing metal-based silver nanostructure array material with high efficiency and low cost

Abstract

The invention relates to a preparation method of a metal-based silver nanostructure array material. The invention prepares the metal-based silver nanostructure array material by utilizing the displacement reaction between active metal atoms and silver ions and by using a method of assisting the self-assembly and collaborative growth of silver ions by a lyotropic liquid crystal soft template. The method can prepare the silver nanostructure array with adjustable size and controllable morphology, is simple in preparation method, does not need large-scale instruments and equipment, is suitable for mass production of silver nanostructure array materials with uniform morphology, and can be used in the related fields of surface enhanced spectroscopy technology, photocatalysis and the like.

Inventors

• ZHANG YING
• HAO ENJIE
• CHEN YAO

Assignees

• 中国民航大学

Dates

Publication Date

20260508

Application Date

20241101

Claims (12)

1. 1. A preparation method of a metal-based silver nanostructure array material comprises the following steps of Step 1, preparation of a lyotropic liquid crystal soft template Dissolving a metal silver source in water, fully stirring, dropwise adding the mixed solution serving as a third phase solution into the prepared first solution, fully stirring in a dark place to obtain a second solution, and at the moment, obtaining the second solution, namely the lyotropic liquid crystal template solution containing silver. Step 2, treatment of solid Metal substrate And (3) carrying out chemical polishing treatment on the solid metal substrate, washing with ethanol and deionized water, and drying to obtain the smooth substrate with the surface oxide layer removed. Step3, preparation of metal-based silver nano material And (2) placing the processed solid metal substrate in the lyotropic liquid crystal template solution prepared in the step (2), and reducing the metal silver source into a silver nanomaterial through oxidation-reduction reaction between the metal substrate and the metal silver source to obtain the metal-based silver nanostructure array material.
2. 2. The method of claim 1, wherein the surfactant and the oil phase solvent solution have a concentration of 1 to 3mol/L.
3. 3. The method of claim 1, wherein the molar ratio of surfactant to water is 1 (5-20).
4. 4. The method of claim 1, wherein the metallic silver source solution has a concentration of 0.001mol/L to 10mol/L.
5. 5. The method of preparation of claim 1, wherein the surfactant comprises one or more of sodium bis (2-ethylhexyl) succinate sulfonate, sodium dodecylbenzene sulfonate, cetyltrimethylammonium bromide.
6. 6. The method of claim 1, wherein the oil phase solvent is one or more of xylenes.
7. 7. The method of claim 1, wherein the metallic silver source comprises one or more of an oxalate and an acetate of elemental silver.
8. 8. The method of manufacturing according to claim 1, wherein the solid metal substrate comprises one of zinc, iron, copper, and the like.
9. 9. The method of claim 1, wherein the reaction time is 1min to 24h.
10. 10. The method of claim 1, wherein the reaction temperature is from 5 ℃ to 50 ℃.
11. 11. A metal-based silver nanomaterial made by the method of any of claims 1-10.
12. 12. The metallic nanomaterial of claim 11, wherein the metallic nanomaterial is 5nm to 10 μm in size.

Description

Method for preparing metal-based silver nanostructure array material with high efficiency and low cost Technical Field The invention relates to the technical field of preparation of metal nano materials, in particular to a silver nano structure array material on a metal substrate and a preparation method thereof. Background The noble metal-based silver nano-structure array material has potential application value in the fields of surface enhanced spectrum technology, photocatalysis and the like by virtue of unique optical and electrical properties. The surface plasmon resonance coupling between the silver nanostructures and the solid metal substrate allows the characteristic to be more fully exhibited. How to prepare a metal-based silver nanostructure array material with good performance is a hot spot of constant research, and the prior art generally adopts methods of mechanical grinding, ion sputtering, nanoimprint and the like to prepare the metal-based silver nanomaterial. The method for preparing the nano array material by ion sputtering and nano imprinting has the advantages of controllable, orderly arrangement and good quality, but has the defects of high equipment requirement, high preparation efficiency and difficulty in large-area growth of the material. Therefore, it is necessary to provide a simple, low-cost, high-efficiency preparation method for preparing metal-based silver nano-materials in a large area. Disclosure of Invention In view of the above, the invention provides a metal-based silver nanostructure array material and a preparation method thereof, wherein the preparation method adopts a lyotropic liquid crystal template method to assist silver ion self-assembly growth, firstly, oil phases in three phases forming lyotropic liquid crystal and a surfactant are mixed, then a metal silver source is dissolved in water, and the mixed solution is dropwise added into the mixed solution of the oil phases and the surfactant to obtain a lyotropic liquid crystal template solution containing silver. And (3) polishing, cleaning and drying the solid metal substrate, placing the solid metal substrate in the prepared lyotropic liquid crystal template solution without adding a reducing agent, reducing a metal silver source into a silver nano array material with a certain shape by utilizing the oxidation-reduction reaction of the metal substrate and silver element in the solution and combining the control and regulation effects of the lyotropic liquid crystal template, and attaching the silver nano array material to the metal substrate. The method has the advantages of simple process, low cost and controllable appearance of the prepared silver nanostructure array material, and can realize batch production of metal-based silver nanomaterial. In a first aspect, the present invention provides a method for preparing a metal-based metal nanomaterial, comprising the steps of: Dissolving a metal silver source in water, fully stirring, dropwise adding the mixed solution serving as a third phase solution into the prepared first solution, and fully stirring in a dark place to obtain a second solution; Carrying out chemical polishing treatment on the solid metal base, washing with ethanol and deionized water, and drying to obtain a smooth substrate with the surface oxide layer removed; And (3) placing the processed solid metal substrate in the lyotropic liquid crystal template solution prepared in the step (2), and reducing the metal silver source into a silver nano material through oxidation-reduction reaction between the metal substrate and the metal silver source to obtain the metal-based silver nano structure array material. Optionally, the surfactant comprises one or more of sodium bis (2-ethylhexyl) succinate sulfonate, sodium dodecylbenzene sulfonate, cetyltrimethylammonium bromide. In the present invention, preferably, the surfactant is sodium bis (2-ethylhexyl) succinate sulfonate. Optionally, the oil phase comprises one or more of xylenes. In the present invention, preferably, the oil phase is para-xylene. Optionally, the concentration of the surfactant and the oil phase solvent solution is 1-3mol/L. In the present invention, preferably, the surfactant and the oil phase solvent are in a molar ratio of 1.4mol/L. Optionally, the metallic silver source comprises one or more of oxalate, acetate comprising elemental silver. In the present invention, preferably, the metallic silver source is silver trifluoroacetate. Optionally, the concentration of the metallic silver source solution is 0.001mol/L to 10mol/L. Further alternatively, the concentration is 0.1mol/L to 3mol/L. In the present invention, preferably, the concentration of the silver source solution is 0.3mol/L. Alternatively, the solid metal substrate comprises one of copper, zinc, and the like. In the present invention, preferably, the solid metal substrate is copper. Alternatively, the solution temperature is 5-50 ℃ during the redox reaction. In the pre