Method for preparing Cu micro-nano sheet structure through chemical dealloying

Abstract

The invention discloses a method for preparing a Cu micro-nano sheet structure through chemical dealloying. The method comprises the following steps that 1, a Cu-Ni-Fe semi-stable state eutectic structure is manufactured by using an additional material; pure Cu powder, pure Ni powder and pure Fe powder are mixed according to the atomic ratio of 17-18 to 17-18 to 62-68, and then the Cu-Ni-Fe semi-stable state eutectic structure is manufactured by utilizing an additional material manufacturing system; 2, dealloying is performed, the obtained Cu-Ni-Fe semi-stable state eutectic structure is put in 0.03-0.07 mol / L of nitric acid solution, standing is performed at room temperature for 2-8 hours, and chemical dealloying is performed; 3, cleaning and drying are performed, the obtained de-alloyed Cu-Ni-Fe semi-stable state eutectic structure is taken out, soaking and cleaning are performed by sequentially using deionized water and ethyl alcohol, and the Cu micro-nano sheet structure is obtained after drying. The Cu micro-nano sheet structure is prepared by utilizing a simple chemical dealloying method, and a new technical way is provided for preparation of a complicated metal micro-nano structure.

Description

technical field

[0001] The invention relates to the field of material science and engineering, in particular to a method for preparing a Cu micro-nano sheet structure by chemical dealloying. Background technique

[0002] Due to their size effect and surface effect, metal nanomaterials can exhibit properties that are quite different from those of macroscopic bulk materials, and have the potential to be widely used in many fields such as surface modification, sensing, optics, catalysis, and energy conversion and storage. Therefore, it is an important topic in the field of micro-nano science to explore new methods for preparing metal micro-nano structures in various forms, and the research results have important application value.

[0003] At present, a variety of techniques can realize the synthesis and preparation of metal micro-nanostructures, such as vapor phase physical deposition, vapor phase chemical deposition, solution gel method, arc discharge method, sputtering depos...

Examples

example 1

[0034] The method for preparing Cu micro-nano plate structure comprises the following steps:

[0035] (1) Additive manufacturing of Cu-Ni-Fe metastable eutectic structure: After mixing pure Cu, pure Ni and pure Fe powders at an atomic ratio of 17.5:17.5:65, when the water and oxygen content is lower than 10ppm 1. Under the protection of high-purity argon gas, the metastable eutectic structure of Cu-Ni-Fe was prepared by using the simultaneous powder feeding laser additive manufacturing system;

[0036] (2) Dealloying: first configure a nitric acid solution with a concentration of 0.05mol / L, then cut the Cu-Ni-Fe metastable eutectic structure obtained in step (1) into small pieces of 5mm×5mm×10mm, and place them in In the nitric acid solution, place it at room temperature for 4 hours to carry out chemical dealloying;

[0037] It is worth noting that in this process, the nitric acid solution should be slightly excessive, and then the final product is controlled by controlling t...

example 2

[0043] This example prepares the method for Cu micro-nano flake structure and comprises the following steps:

[0044](1) Additive manufacturing of Cu-Ni-Fe metastable eutectic structure: After mixing pure Cu, pure Ni and pure Fe powders at an atomic ratio of 17:17:62, the water oxygen content is lower than 10ppm 1. Under vacuum conditions, the metastable eutectic structure of Cu-Ni-Fe was prepared by using the additive manufacturing system with high electron beam energy as the energy source;

[0045] (2) Dealloying: Place the obtained Cu-Ni-Fe metastable eutectic structure in 0.03mol / L nitric acid solution. After 6 hours at room temperature, the nitric acid solution turns light yellow, which means chemical dealloying is completed. ;

[0046] (3) Cleaning and drying: take out the obtained dealloyed Cu-Ni-Fe metastable eutectic structure, first soak the obtained dealloyed Cu-Ni-Fe metastable eutectic structure with deionized water After cleaning for 3 times, soak and wash with...

example 3

[0048] This example prepares the method for Cu micro-nano plate structure and comprises the following steps:

[0049] (1) Additive manufacturing of Cu-Ni-Fe metastable eutectic structure: After mixing pure Cu, pure Ni and pure Fe powders at an atomic ratio of 18:18:68, the water oxygen content is lower than 10ppm 1. Under the protection condition of high-purity argon gas, the Cu-Ni-Fe metastable eutectic structure was prepared by using the additive manufacturing system with electron beam high energy as the energy source;

[0050] (2) Dealloying: Place the obtained Cu-Ni-Fe metastable eutectic structure in a 0.07mol / L nitric acid solution. After standing at room temperature for 8 hours, the nitric acid solution turns light yellow, that is, the chemical dealloying is completed. ;

[0051] (3) Cleaning and drying: take out the obtained dealloyed Cu-Ni-Fe metastable eutectic structure, first soak the obtained dealloyed Cu-Ni-Fe metastable eutectic structure with deionized water ...

technical field

[0001] The invention relates to the field of material science and engineering, in particular to a method for preparing a Cu micro-nano sheet structure by chemical dealloying. Background technique

[0002] Due to their size effect and surface effect, metal nanomaterials can exhibit properties that are quite different from those of macroscopic bulk materials, and have the potential to be widely used in many fields such as surface modification, sensing, optics, catalysis, and energy conversion and storage. Therefore, it is an important topic in the field of micro-nano science to explore new methods for preparing metal micro-nano structures in various forms, and the research results have important application value.

[0003] At present, a variety of techniques can realize the synthesis and preparation of metal micro-nanostructures, such as vapor phase physical deposition, vapor phase chemical deposition, solution gel method, arc discharge method, sputtering depos...

Examples

example 1

[0034] The method for preparing Cu micro-nano plate structure comprises the following steps:

[0035] (1) Additive manufacturing of Cu-Ni-Fe metastable eutectic structure: After mixing pure Cu, pure Ni and pure Fe powders at an atomic ratio of 17.5:17.5:65, when the water and oxygen content is lower than 10ppm 1. Under the protection of high-purity argon gas, the metastable eutectic structure of Cu-Ni-Fe was prepared by using the simultaneous powder feeding laser additive manufacturing system;

[0036] (2) Dealloying: first configure a nitric acid solution with a concentration of 0.05mol / L, then cut the Cu-Ni-Fe metastable eutectic structure obtained in step (1) into small pieces of 5mm×5mm×10mm, and place them in In the nitric acid solution, place it at room temperature for 4 hours to carry out chemical dealloying;

[0037] It is worth noting that in this process, the nitric acid solution should be slightly excessive, and then the final product is controlled by controlling t...

example 2

[0043] This example prepares the method for Cu micro-nano flake structure and comprises the following steps:

[0044](1) Additive manufacturing of Cu-Ni-Fe metastable eutectic structure: After mixing pure Cu, pure Ni and pure Fe powders at an atomic ratio of 17:17:62, the water oxygen content is lower than 10ppm 1. Under vacuum conditions, the metastable eutectic structure of Cu-Ni-Fe was prepared by using the additive manufacturing system with high electron beam energy as the energy source;

[0045] (2) Dealloying: Place the obtained Cu-Ni-Fe metastable eutectic structure in 0.03mol / L nitric acid solution. After 6 hours at room temperature, the nitric acid solution turns light yellow, which means chemical dealloying is completed. ;

[0046] (3) Cleaning and drying: take out the obtained dealloyed Cu-Ni-Fe metastable eutectic structure, first soak the obtained dealloyed Cu-Ni-Fe metastable eutectic structure with deionized water After cleaning for 3 times, soak and wash with...

example 3

[0048] This example prepares the method for Cu micro-nano plate structure and comprises the following steps:

[0049] (1) Additive manufacturing of Cu-Ni-Fe metastable eutectic structure: After mixing pure Cu, pure Ni and pure Fe powders at an atomic ratio of 18:18:68, the water oxygen content is lower than 10ppm 1. Under the protection condition of high-purity argon gas, the Cu-Ni-Fe metastable eutectic structure was prepared by using the additive manufacturing system with electron beam high energy as the energy source;

[0050] (2) Dealloying: Place the obtained Cu-Ni-Fe metastable eutectic structure in a 0.07mol / L nitric acid solution. After standing at room temperature for 8 hours, the nitric acid solution turns light yellow, that is, the chemical dealloying is completed. ;

[0051] (3) Cleaning and drying: take out the obtained dealloyed Cu-Ni-Fe metastable eutectic structure, first soak the obtained dealloyed Cu-Ni-Fe metastable eutectic structure with deionized water ...

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