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Synthetic method of gold-platinum material with special structure

A technology with special structure and synthesis method, applied in metal material coating technology, chemical instruments and methods, metal processing equipment, etc., can solve the problems of difficult control of synthesis structure and long synthesis time of gold-platinum bimetallic

Pending Publication Date: 2021-05-07
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 that the synthesis time of gold-platinum bimetal is long and the final synthesis structure is difficult to control, the present invention provides a synthesis method of gold-platinum material with a special structure, which can efficiently synthesize a structure-controllable gold-platinum bimetal structure, Moreover, the reaction conditions are simple and the cost is low

Method used

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

[0032] see figure 1 , shows the synthesis method of the special structure gold-platinum material proposed by the present invention, which specifically includes the following steps:

[0033] Step S1, using the seed growth method to prepare gold nanorods (see figure 2 ).

[0034] Step S2, take the gold nanorods that have been cleaned and dispersed in low-concentration CTAB as new seeds, add a corresponding amount of CTAB, silver nitrate solution, and potassium tetrachloroplatinate solution on the seeds, and control the reaction temperature to synthesize A gold-platinum material with a special structure.

[0035] Wherein, the step S1 further includes the following steps:

[0036] 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.

[0037] S11: Dissolve 2.5mL CTAB (0...

Embodiment 1

[0046] 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

[0048] 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 of AgNO3 (4 mM) solution was added. 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 (1-2...

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Abstract

The invention discloses a synthesis method of a gold-platinum material with a special structure. The material comprises a gold nanorod serving as a core structure and platinum growing at the two ends of the gold nanorod. According to the synthetic method of the gold-platinum material with the special structure, a seed growth method is adopted, and platinum is grown on the gold nanorod. The method mainly comprises the following steps that firstly, the gold nanorod grows by using the seed growth method, and then the successfully grown gold nanorod is cleaned to obtain a gold nanorod with relatively high purity; and then the gold nanorod is adopted as a seed, a corresponding amount of surfactant and platinate are added, uniform mixing is conducted, and the reaction temperature is controlled, so that platinum successfully grows on the two ends of the gold nanorod. The growth condition of platinum is observed through a transmission electron microscope. According to the synthesized gold-platinum material, platinum can completely grow at the two ends of the gold nanorod, and no platinum is deposited on the side face of the gold nanorod. The method has simple reaction conditions, high reaction rate and low cost.

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 material with a special structure. 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. Due to the enhanced surface Raman scattering and surface plasmon resonance properties of gold nanorods, they can be used for the detection of trace molecules and ions. 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 - widely...

Claims

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Application Information

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IPC IPC(8): B22F9/24B22F1/02C23C18/08B82Y40/00B01J23/52
CPCB22F9/24C23C18/08B82Y40/00B01J23/52B22F2009/245B22F2301/255B22F1/17
Inventor 邓天松张棋卫鸣璋顾伊杰程知群
Owner HANGZHOU DIANZI UNIV
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