Gold-sliver alloy two-dimensional ordered nano film prepared by in-situ interface transformation and method for preparing gold-sliver alloy two-dimensional ordered nano film

Abstract

The invention relates to a gold-sliver alloy two-dimensional ordered nano film prepared by in-situ interface transformation and a method for preparing the gold-sliver alloy two-dimensional ordered nano film. The method adopting a two-step transformation process comprises the following steps: by taking a single-layer polystyrene sphere self-assembled film as a template, preparing a polystyrene-silver nano net film with a controllable thickness by a gas slow release method; transferring the polystyrene-silver nano net film to a solution surface of a chloroauric acid and disodium hydrogen phosphate solution, and obtaining the gold-sliver alloy two-dimensional ordered nano film by carrying out in-situ replacement reaction; and finally, soaking the gold-sliver alloy two-dimensional ordered nano film to remove the polystyrene template. The synthetic method has the advantages of being simple, quick, gentle and low in energy consumption, and meets the requirements of green chemistry; the smallest constitutional unit of the prepared gold-sliver alloy two-dimensional ordered nano net film is a hollow gold-sliver alloy nano particle; and the film has the advantages of being great in specific surface area, good in permeability, low in density and the like, can be loaded on substrates of different types, has the advantages of being convenient to recycle, and easy to enlarge a product, and can be widely applied to the fields of photoelectrocatalysis, biosensing, biological medicine carrying and the like.

Description

technical field

[0001] The invention relates to a method for preparing a structure-controllable noble metal alloy thin film, in particular to a method for preparing a gold-silver alloy two-dimensional ordered nano-film by in-situ interface conversion. Background technique

[0002] Noble metal particles represented by gold and silver nanoparticles have potential applications in the field of nano research due to their unique photoelectric properties. First of all, nanoscale gold and silver nanoparticles, due to their unique small size effect and surface plasmon resonance effect, make the material's light absorption range significantly red-shifted "A General Method for the Rapid Synthesis of Hollow Metallicor Bimetallic Nanoelectrocatalysts with Urchinlike Morphology" [Guo, S.J.; Dong, S.J..Eur.J., 2008, 14,4689.]. It is used as an auxiliary catalyst in the construction of materials in the field of catalysis, and improves the photocatalytic performance of materials by increasi...

Examples

Embodiment 1

[0021] A method for preparing a gold-silver alloy two-dimensional ordered nano-film by an in-situ interface conversion method, the method comprising the following steps:

[0022] Take the desiccator as the reaction vessel, put a Petri dish filled with 15 mmol / L silver nitrate solution on its upper layer, and add 30 microliters of polystyrene balls ( figure 1 A) ethanol-water (V ethanol: V water = 1:1) mixed solution, after a while, the single-layer polystyrene sphere self-assembled film ( figure 1 B) The assembly is completed; place about 3.5 grams of finely ground dimethylaminoborane powder and 5 milliliters of nitric acid aqueous solution with a concentration of 5 mol / liter in the lower layer. After about 4 hours of reaction, the silver-polystyrene ball two-dimensional ordered nanonet film ( figure 1 EF); and after 25 hours of reaction, a dense silver-polystyrene sphere two-dimensional ordered nanonet film ( figure 1 CD), in the film, silver nanoparticles are tightly packe...

Embodiment 2

[0024] A method for preparing a gold-silver alloy two-dimensional ordered nano-film by an in-situ interface conversion method, the method comprising the following steps:

[0025] (1) Get the desiccator as the reaction vessel, and its upper layer is placed flatly to fill the petri dish of 20 mmol / liter silver nitrate solution, and the ethanol-water (V ethanol: V water= 1:1) mixed solution, after a while, the single-layer polystyrene spherical self-assembled membrane was assembled; about 3.5 grams of finely ground dimethylaminoborane powder and 5 milliliters of nitric acid aqueous solution with a concentration of 5 mol / liter were placed in the lower layer . After about 25 hours of reaction, a dense silver-polystyrene ball two-dimensional ordered nano-network film can be obtained.

[0026] (2) Pipette a mixed reaction solution consisting of 10 ml of chloroauric acid (15 mmol / L) and 15 ml of disodium hydrogen phosphate (200 mmol / L) into a clean Petri dish. Take a smooth and clea...

Embodiment 3

[0029] A method for preparing a gold-silver alloy two-dimensional ordered nano-film by an in-situ interface conversion method, the method comprising the following steps:

[0030](1) Get the desiccator as the reaction vessel, and its upper layer is placed flatly to fill the petri dish of 15 mmol / liter silver nitrate solution, and the ethanol-water (V ethanol: V water= 1:1) mixed solution, after a while, the single-layer polystyrene spherical self-assembled membrane was assembled; about 3.5 grams of finely ground dimethylaminoborane powder and 5 milliliters of nitric acid aqueous solution with a concentration of 5 mol / liter were placed in the lower layer . After about 25 hours of reaction, a dense silver-polystyrene ball two-dimensional ordered nano-network film can be obtained.

[0031] (2) Pipette a mixed reaction solution consisting of 10 ml of chloroauric acid (15 mmol / L) and 15 ml of disodium hydrogen phosphate (100 mmol / L) into a clean petri dish. Take a smooth and clean...

technical field

[0001] The invention relates to a method for preparing a structure-controllable noble metal alloy thin film, in particular to a method for preparing a gold-silver alloy two-dimensional ordered nano-film by in-situ interface conversion. Background technique

[0002] Noble metal particles represented by gold and silver nanoparticles have potential applications in the field of nano research due to their unique photoelectric properties. First of all, nanoscale gold and silver nanoparticles, due to their unique small size effect and surface plasmon resonance effect, make the material's light absorption range significantly red-shifted "A General Method for the Rapid Synthesis of Hollow Metallicor Bimetallic Nanoelectrocatalysts with Urchinlike Morphology" [Guo, S.J.; Dong, S.J..Eur.J., 2008, 14,4689.]. It is used as an auxiliary catalyst in the construction of materials in the field of catalysis, and improves the photocatalytic performance of materials by increasi...

Examples

Embodiment 1

[0021] A method for preparing a gold-silver alloy two-dimensional ordered nano-film by an in-situ interface conversion method, the method comprising the following steps:

[0022] Take the desiccator as the reaction vessel, put a Petri dish filled with 15 mmol / L silver nitrate solution on its upper layer, and add 30 microliters of polystyrene balls ( figure 1 A) ethanol-water (V ethanol: V water = 1:1) mixed solution, after a while, the single-layer polystyrene sphere self-assembled film ( figure 1 B) The assembly is completed; place about 3.5 grams of finely ground dimethylaminoborane powder and 5 milliliters of nitric acid aqueous solution with a concentration of 5 mol / liter in the lower layer. After about 4 hours of reaction, the silver-polystyrene ball two-dimensional ordered nanonet film ( figure 1 EF); and after 25 hours of reaction, a dense silver-polystyrene sphere two-dimensional ordered nanonet film ( figure 1 CD), in the film, silver nanoparticles are tightly packe...

Embodiment 2

[0024] A method for preparing a gold-silver alloy two-dimensional ordered nano-film by an in-situ interface conversion method, the method comprising the following steps:

[0025] (1) Get the desiccator as the reaction vessel, and its upper layer is placed flatly to fill the petri dish of 20 mmol / liter silver nitrate solution, and the ethanol-water (V ethanol: V water= 1:1) mixed solution, after a while, the single-layer polystyrene spherical self-assembled membrane was assembled; about 3.5 grams of finely ground dimethylaminoborane powder and 5 milliliters of nitric acid aqueous solution with a concentration of 5 mol / liter were placed in the lower layer . After about 25 hours of reaction, a dense silver-polystyrene ball two-dimensional ordered nano-network film can be obtained.

[0026] (2) Pipette a mixed reaction solution consisting of 10 ml of chloroauric acid (15 mmol / L) and 15 ml of disodium hydrogen phosphate (200 mmol / L) into a clean Petri dish. Take a smooth and clea...

Embodiment 3

[0029] A method for preparing a gold-silver alloy two-dimensional ordered nano-film by an in-situ interface conversion method, the method comprising the following steps:

[0030](1) Get the desiccator as the reaction vessel, and its upper layer is placed flatly to fill the petri dish of 15 mmol / liter silver nitrate solution, and the ethanol-water (V ethanol: V water= 1:1) mixed solution, after a while, the single-layer polystyrene spherical self-assembled membrane was assembled; about 3.5 grams of finely ground dimethylaminoborane powder and 5 milliliters of nitric acid aqueous solution with a concentration of 5 mol / liter were placed in the lower layer . After about 25 hours of reaction, a dense silver-polystyrene ball two-dimensional ordered nano-network film can be obtained.

[0031] (2) Pipette a mixed reaction solution consisting of 10 ml of chloroauric acid (15 mmol / L) and 15 ml of disodium hydrogen phosphate (100 mmol / L) into a clean petri dish. Take a smooth and clean...

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