Synthetic method of gold-platinum bimetallic structure material

A technology of structural materials and synthesis methods, applied in the fields of nanotechnology, metal processing equipment, nanotechnology, etc. for materials and surface science, which can solve the problems of uneven synthesis and long synthesis time of gold-platinum bimetals.

Pending Publication Date: 2021-05-18
HANGZHOU DIANZI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the problem of long synthesis time and uneven synthesis of gold-platinum bimetallic materials, the present invention provides a method for synthesiz

Method used

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  • Synthetic method of gold-platinum bimetallic structure material
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preparation example Construction

[0031] see figure 1 , showing the synthesis method of the gold-platinum bimetallic structure proposed by the present invention, which specifically includes the following steps:

[0032] Step S1, using the seed growth method to prepare gold nanorods.

[0033] Step S2, take the gold nanorods that have been cleaned and dispersed in low-concentration CTAB as new seeds, add a corresponding amount of CTAC, silver nitrate solution, potassium tetrachloroplatinate solution, ascorbic acid solution, control The reaction temperature synthesizes the bimetallic structure.

[0034] Wherein, the step S1 further includes the following steps:

[0035] S10: Mix 10mL CTAB (0.1M) with 0.25mL HAuCl 4 (10mM) is mixed in the bottle, and a certain mass of NaBH 4 Mix to form a 0.01M solution, and add 0.6mL to the bottle and stir vigorously. The solution turns from golden yellow to brown, which is the seed solution.

[0036] S11: Dissolve 2.5mL CTAB (0.1M) and 0.037g NaOL in 21.25mL water at 50°C....

Embodiment 1

[0045] Mix 10mL CTAB (0.1M) with 0.25mL HAuCl 4 (10mM) is mixed in the bottle, and a certain mass of NaBH 4 Mix to form a 0.01M solution, and add 0.6mL to the bottle and stir vigorously. The solution turns from golden yellow to brown, which is the seed solution. 2.5 mL of CTAB (0.1 M) and 0.037 g of NaOL were dissolved in 21.25 mL of water at 50°C. After dissolution, the solution was cooled to 30 °C, and then 0.9 mL AgNO was added 3 (4mM) solution. and kept at 30°C for 15 minutes, then added 0.25mL HAuCl 4 (10mM). After 60-90 minutes of stirring (400 rpm), the solution changed from golden yellow to colorless. This is the growth solution. The pH was adjusted by adding 0.3 mL of HCl (37 wt.%) to the growth solution. After that, 75 μL of AA (64 mM), 40 μL of seed solution were added sequentially and stirred vigorously. The final solution was left to stand for 12 hours in a 30°C water bath. The solution after growth was centrifuged (7000rpm, 30 minutes), and CTAB (1-2mM)...

Embodiment 2

[0047] Mix 10mL CTAB (0.1M) with 0.25mL HAuCl 4 (10mM) is mixed in the bottle, and a certain mass of NaBH 4 Mix to form a 0.01M solution, and add 0.6mL to the bottle and stir vigorously. The solution turns from golden yellow to brown, which is the seed solution. 2.5 mL of CTAB (0.1 M) and 0.037 g of NaOL were dissolved in 21.25 mL of water at 50°C. After dissolution, the solution was cooled to 30 °C, and then 0.9 mL AgNO was added 3 (4mM) solution. and kept at 30°C for 15 minutes, then added 0.25mL HAuCl 4 (10mM). After 60-90 minutes of stirring (400 rpm), the solution changed from golden yellow to colorless. This is the growth solution. The pH was adjusted by adding 0.3 mL of HCl (37 wt.%) to the growth solution. After that, 75 μL of AA (64 mM), 40 μL of seed solution were added sequentially and stirred vigorously. The final solution was left to stand for 12 hours in a 30°C water bath. The solution after growth was centrifuged (7000rpm, 30 minutes), and CTAB (1-2mM)...

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Abstract

The invention discloses a synthetic method of a gold-platinum bimetallic structure material. The bimetallic structure comprises a gold nanorod serving as a core structure and platinum serving as a shell structure. According to the synthetic method, a seed growth method is adopted, and platinum is grown on the gold nanorod. The synthetic method mainly comprises the following steps of firstly, growing the gold nanorod by using the seed growth method, and then cleaning the successfully grown gold nanorod to obtain a gold nanorod with high purity; then taking the gold nanorod as a seed, adding a corresponding amount of surfactant, platinate and a reducing agent, and uniformly mixing the gold nanorod with the surfactant, the platinate and the reducing agent; and finally, controlling the reaction temperature, so that platinum successfully growing on the gold nanorod, and observing the growth condition of the platinum through a transmission electron microscope graph. The synthesized gold-platinum bimetal is more uniform, the reaction conditions are more concise, the reaction speed is increased, and low cost is achieved.

Description

technical field [0001] The invention relates to the synthesis field of metal nanometer materials, in particular to a synthesis method of a gold-platinum double metal structure material. Background technique [0002] In recent years, the research on noble metal nanoparticles has developed rapidly, among which the research on gold nanorods is the most prominent. Due to the rich chemical and physical properties of gold nanorods, first of all it can be used in life sciences, including in vitro diagnosis, in vivo imaging and in vivo therapy. Secondly, gold nanorods are also widely used in sensors. Because gold nanorods have extremely strong surface Raman scattering enhancement and surface plasmon resonance properties, they can be used for trace molecule and ion detection. At the same time, gold nanorods can also be made into optical components, such as near-infrared filters, solar cells, polarizers, etc. In addition, there is another very important application of gold nanorods ...

Claims

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Application Information

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IPC IPC(8): B22F9/24B82Y30/00B82Y40/00B22F1/00
CPCB22F9/24B82Y40/00B82Y30/00B22F1/054Y02E60/50
Inventor 邓天松张棋卫鸣璋顾伊杰程知群
Owner HANGZHOU DIANZI UNIV
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