Silver nanoline-ReS2 functional composite material and preparation method thereof

Abstract

The invention discloses a silver nanowire ReS2 functional composite material. The surface of a silver nanowire is coated with a layer of ReS2 nanosheet. The invention also discloses a preparation method of the silver nanowire ReS2 functional composite material. The preparation method comprises the following steps: 1), synthesizing silver nanowires by adopting a polyol method; 2), purifying the silver nanowire to obtain a washed and purified silver nanowire; dispersing the washed and purified silver nanowires in a solvent; centrifuging the dispersed silver nanowire solution in a centrifugal machine, and ultrasonically dispersing the centrifuged precipitate to obtain silver nanowire dispersion liquid; 3), preparing a uniformly dispersed ReS2 nanosheet; and 4), performing hydrothermal compounding on the silver nanowire dispersion liquid and the ReS2 nanosheet to obtain the silver nanowire-ReS2 functional composite material. According to the preparation method, Raman scattering with higherstrength can be provided, and the SERS activity is greatly improved.

Description

technical field

[0001] The invention belongs to the technical field of nanomaterial preparation, photocatalysis and Raman enhancement, and relates to a silver nanowire-ReS 2 Functional composite material, the present invention also relates to this kind of silver nanowire-ReS 2 Preparation methods of functional composite materials. Background technique

[0002] Surface Raman-enhanced technology is one of the most sensitive and effective analytical techniques at present. In the mid-1970s, surface-enhanced Raman scattering was first observed on silver electrodes. Surface Raman scattering is due to the coupling effect of the surface plasmon of the metal. When the Raman spectrum is formed near the metal surface and the molecule to be measured, it will be strongly enhanced in signal, thus forming a surface-enhanced Raman spectrum. Surface-enhanced Raman scattering plays an important role in the field of analysis and detection. However, with its continuous development, noble met...

Examples

Embodiment 1

[0047] Step 1, preparing silver nanowires,

[0048] 1.1) Mix 120mL glycerol and 4.9g polyvinylpyrrolidone in a three-neck round bottom flask, and stir strongly at 90°C for 15min;

[0049] 1.2) When the temperature naturally drops to 40°C, add 7 mL of a glycerol solution containing 0.3 mL of water and 48 mg of sodium chloride to the flask, and stir for 8 minutes with a strong magnetic field;

[0050] 1.3) Then 1.21g of silver nitrate was quickly added to the solution, stirred gently (60rpm), and then the reaction temperature was raised from 40°C to 170°C within 40min;

[0051] 1.4) When the temperature reaches 170°C, stop heating, pour the solution in the flask into a 500mL beaker immediately, then add deionized water at a ratio of 1:1 to lower the temperature, leave it at room temperature for two days, and remove the supernatant , to obtain silver nanowire solution;

[0052] The reaction process of the whole step 1 is carried out under reflux conditions.

[0053] Step 2, pu...

Embodiment 2

[0064] Step 1, preparing silver nanowires,

[0065] 1.1) Mix 120mL of ethylene glycol and 4.9g of polyvinylpyrrolidone in a three-neck round bottom flask, and stir strongly at 90°C for 15min;

[0066] 1.2) When the temperature naturally drops to 60°C, add 0.7mL of water and 72mg of sodium chloride to the flask Ethylene glycol Solution 7mL, strong magnetic stirring 8min;

[0067] 1.3) Quickly add 1.21g of silver nitrate into the solution, stir gently (60rpm), then raise the reaction temperature from 60°C to 210°C within 50min;

[0068] 1.4) When the temperature reaches 210°C, stop heating, pour the solution in the flask into a 1000mL beaker immediately, then add deionized water at a ratio of 1:2 to lower the temperature, leave it at room temperature for two days, and remove the supernatant , to obtain silver nanowire solution;

[0069] The reaction process of the whole step 1 is carried out under reflux conditions.

[0070] Step 2, purifying silver nanowires,

[0071] The...

Embodiment 3

[0079] Step 1, preparing silver nanowires,

[0080] 1.1) Mix 150mL of glycerol and 5.14g of polyvinylpyrrolidone in a three-neck round bottom flask, and stir strongly at 100°C for 20min;

[0081] 1.2) When the temperature naturally drops to 50°C, add 7mL of a glycerol solution containing 1.2mL of water and 16mg of ferric chloride to the flask, and stir with a strong magnetic field for 8min;

[0082] 1.3) Then quickly add 1.21g of silver nitrate into the solution, stir gently (60rpm), then raise the reaction temperature from 50°C to 230°C within 40min;

[0083] 1.4) When the temperature reaches 230°C, stop heating, pour the solution in the flask into a 1000mL beaker immediately, then add deionized water at a ratio of 1:3 to lower the temperature, leave it at room temperature for two days, and remove the supernatant , to obtain silver nanowire solution;

[0084] The reaction process of the whole step 1 is carried out under reflux conditions.

[0085] Step 2, purifying silver ...

technical field

[0001] The invention belongs to the technical field of nanomaterial preparation, photocatalysis and Raman enhancement, and relates to a silver nanowire-ReS 2 Functional composite material, the present invention also relates to this kind of silver nanowire-ReS 2 Preparation methods of functional composite materials. Background technique

[0002] Surface Raman-enhanced technology is one of the most sensitive and effective analytical techniques at present. In the mid-1970s, surface-enhanced Raman scattering was first observed on silver electrodes. Surface Raman scattering is due to the coupling effect of the surface plasmon of the metal. When the Raman spectrum is formed near the metal surface and the molecule to be measured, it will be strongly enhanced in signal, thus forming a surface-enhanced Raman spectrum. Surface-enhanced Raman scattering plays an important role in the field of analysis and detection. However, with its continuous development, noble met...

Examples

Embodiment 1

[0047] Step 1, preparing silver nanowires,

[0048] 1.1) Mix 120mL glycerol and 4.9g polyvinylpyrrolidone in a three-neck round bottom flask, and stir strongly at 90°C for 15min;

[0049] 1.2) When the temperature naturally drops to 40°C, add 7 mL of a glycerol solution containing 0.3 mL of water and 48 mg of sodium chloride to the flask, and stir for 8 minutes with a strong magnetic field;

[0050] 1.3) Then 1.21g of silver nitrate was quickly added to the solution, stirred gently (60rpm), and then the reaction temperature was raised from 40°C to 170°C within 40min;

[0051] 1.4) When the temperature reaches 170°C, stop heating, pour the solution in the flask into a 500mL beaker immediately, then add deionized water at a ratio of 1:1 to lower the temperature, leave it at room temperature for two days, and remove the supernatant , to obtain silver nanowire solution;

[0052] The reaction process of the whole step 1 is carried out under reflux conditions.

[0053] Step 2, pu...

Embodiment 2

[0064] Step 1, preparing silver nanowires,

[0065] 1.1) Mix 120mL of ethylene glycol and 4.9g of polyvinylpyrrolidone in a three-neck round bottom flask, and stir strongly at 90°C for 15min;

[0066] 1.2) When the temperature naturally drops to 60°C, add 0.7mL of water and 72mg of sodium chloride to the flask Ethylene glycol Solution 7mL, strong magnetic stirring 8min;

[0067] 1.3) Quickly add 1.21g of silver nitrate into the solution, stir gently (60rpm), then raise the reaction temperature from 60°C to 210°C within 50min;

[0068] 1.4) When the temperature reaches 210°C, stop heating, pour the solution in the flask into a 1000mL beaker immediately, then add deionized water at a ratio of 1:2 to lower the temperature, leave it at room temperature for two days, and remove the supernatant , to obtain silver nanowire solution;

[0069] The reaction process of the whole step 1 is carried out under reflux conditions.

[0070] Step 2, purifying silver nanowires,

[0071] The...

Embodiment 3

[0079] Step 1, preparing silver nanowires,

[0080] 1.1) Mix 150mL of glycerol and 5.14g of polyvinylpyrrolidone in a three-neck round bottom flask, and stir strongly at 100°C for 20min;

[0081] 1.2) When the temperature naturally drops to 50°C, add 7mL of a glycerol solution containing 1.2mL of water and 16mg of ferric chloride to the flask, and stir with a strong magnetic field for 8min;

[0082] 1.3) Then quickly add 1.21g of silver nitrate into the solution, stir gently (60rpm), then raise the reaction temperature from 50°C to 230°C within 40min;

[0083] 1.4) When the temperature reaches 230°C, stop heating, pour the solution in the flask into a 1000mL beaker immediately, then add deionized water at a ratio of 1:3 to lower the temperature, leave it at room temperature for two days, and remove the supernatant , to obtain silver nanowire solution;

[0084] The reaction process of the whole step 1 is carried out under reflux conditions.

[0085] Step 2, purifying silver ...

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