Preparation method of thorn-shaped or petal-shaped rough-surface gold-silver alloy nanometer material

A gold-silver alloy and nano-material technology, which is applied in the field of preparation of gold-silver alloy nano-materials with thorny and petal-like rough surfaces, can solve the problems of inconvenient mass production, low shape controllability, and complicated preparation process, and achieve It is convenient to load and modify a large number of organic compounds, the equipment is simple and easy to operate, and the effect of low reaction temperature

Inactive Publication Date: 2016-10-26
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, most of these methods have complex preparation processes, require additional addition of surfactants and s

Method used

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  • Preparation method of thorn-shaped or petal-shaped rough-surface gold-silver alloy nanometer material
  • Preparation method of thorn-shaped or petal-shaped rough-surface gold-silver alloy nanometer material
  • Preparation method of thorn-shaped or petal-shaped rough-surface gold-silver alloy nanometer material

Examples

Experimental program
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example 1

[0035]Example 1 Preparation of petal-shaped gold-silver alloy nanoparticles (Au@Au-Ag-1).

[0036] 1) Heat a mixture of 0.8 mL of 1% chloroauric acid aqueous solution and 79.2 mL of deionized water in an oil bath to 130° C., then add 2.8 mL of 1% trisodium citrate aqueous solution (prepared now) ), continue to stir at 130°C for 20min, turn off the heat source, and cool to room temperature to obtain gold nanoparticles with a concentration of 0.73nM. They are washed by centrifugation with deionized water, resuspended with deionized water after washing, and the concentration of gold nanoparticles is kept constant. Change, promptly obtain gold nanoparticle seed solution, standby, the prepared gold nanoparticle average particle size is 20nm, as figure 2 , image 3 shown.

[0037] 2) Mix 1.2mL of 10mM chloroauric acid aqueous solution with 3.6mL of deionized water, place in a 10°C environment (water bath) and keep stirring for 10min.

[0038] 3) After step 2), add 2.4 μL of 10 m...

example 2

[0039] Example 2 Prepare spiny gold-silver alloy nanoparticles (Au@Au-Ag-3).

[0040] 1) Heat a mixture of 0.8 mL of 1% chloroauric acid aqueous solution and 79.2 mL of deionized water in an oil bath to 130° C., then add 2.8 mL of 1% trisodium citrate aqueous solution (prepared now) ), continue to stir at 130°C for 20min, turn off the heat source, and cool to room temperature to obtain gold nanoparticles with a concentration of 0.73nM. They are washed by centrifugation with deionized water, resuspended with deionized water after washing, and the concentration of gold nanoparticles is kept constant. Change, promptly obtain gold nanoparticle seed solution, standby, the prepared gold nanoparticle average particle size is 20nm, as figure 2 , image 3 shown.

[0041] 2) Mix 1.2mL of 10mM chloroauric acid aqueous solution with 3.6mL of deionized water, place in a 10°C environment (water bath) and keep stirring for 10min.

[0042] After step 2), add 96μL 10mM silver nitrate aqueo...

example 3

[0043] Example 3 Prepare spiny gold-silver alloy nanoparticles (Au@Au-Ag-3).

[0044] 1) Heat a mixture of 0.8 mL of 1% chloroauric acid aqueous solution and 79.2 mL of deionized water in an oil bath to 130° C., then add 2.8 mL of 1% trisodium citrate aqueous solution (prepared now) ), continue to stir at 130°C for 20min, turn off the heat source, and cool to room temperature to obtain gold nanoparticles with a concentration of 0.73nM. They are washed by centrifugation with deionized water, resuspended with deionized water after washing, and the concentration of gold nanoparticles is kept constant. Change, promptly obtain gold nanoparticle seed solution, standby, the prepared gold nanoparticle average particle size is 20nm, as figure 2 , image 3 shown.

[0045] 2) Mix 1.2mL of 10mM chloroauric acid aqueous solution with 3.6mL of deionized water, place in a 10°C environment (water bath) and keep stirring for 10min.

[0046] 3) After step 2), add 96μL of 10mM silver nitrate...

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Abstract

The invention provides a preparation method of a thorn-shaped or petal-shaped rough-surface gold-silver alloy nanometer material. The preparation method comprises the steps that gold nanoparticle seeds are prepared from a mixed solution of chloroauric acid and trisodium citrate; the gold nanoparticle seeds grow on the surfaces of gold nanoparticles through heterogeneous nucleation; and under the action of molecular synergistic adsorption of L-dopamine, stabilization of atomic clusters, reduction of gold ions and silver ions and underpotential deposition of silver atoms, the thorn-shaped or petal-shaped rough-surface gold-silver alloy nanometer material is prepared and formed. The preparation method is simple in process and effective; production cost can be lowered conveniently; the preparation method is suitable for large-scale production; and the prepared thorn-shaped or petal-shaped rough-surface gold-silver alloy nanometer material is of a unique bionic structure, large in specific surface area and capable of loading a great amount of active medicine and molecular dye. Therefore, the preparation method has wide application prospect in the fields such as SERS sensing, catalysis, diagnosis and treatment and adsorbing materials.

Description

technical field [0001] The invention relates to a preparation method of gold-silver alloy nanomaterials with thorn-like and petal-like rough surfaces. Background technique [0002] Noble metal nanomaterials have attracted increasing attention due to their excellent properties in optics, electricity, catalysis, and sensing. Since scientists discovered that pyridine molecules adsorbed on the surface of rough silver electrodes have enhanced Raman scattering in the 1970s, silver nanomaterials have been widely used in preparation, modification, modification and Surface Enhanced Raman Scattering (SurfaceEnhanced Raman Scattering, SERS). developed rapidly. As a kind of noble metal nanomaterials with unique structure, thorn-like and petal-like have great potential in the fields of SERS sensing, catalysis, medical diagnosis and imaging due to their special hierarchical structure, large specific surface area, good catalytic and optical properties. Wide range of applications. Studie...

Claims

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Application Information

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IPC IPC(8): B22F9/24C30B29/52C30B29/60C22C1/00C22C5/02B82Y40/00
CPCC22C1/00C22C5/02C30B29/52C30B29/60B82Y40/00B22F9/24
Inventor 赵永席陈东圳宋忠孝黄剑陈锋
Owner XI AN JIAOTONG UNIV
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