Preparation method for growing silver composite material on surface of mesoporous silica coated gold nanorod

A technology of mesoporous silica and gold nanorods, applied in nanotechnology, nanotechnology, metal processing equipment, etc., can solve the problems of uneven synthesis results and low synthesis efficiency, and achieve product stability, strong reliability, enhanced The effect of catalytic performance

Active Publication Date: 2021-05-25
HANGZHOU DIANZI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the problem of low synthesis efficiency and uneven final synthesis results of a mesoporous silica-coated gold nanorod surface-growth silver composite material, the present invention provides a mesoporous silica-coated gold nanorod surface-growth silver composite material. The synthesis method of the composite material can efficiently synthesize the uniform mesoporous silica-coated gold nanorod surface-growth silver material, and the reaction conditions are simple and the cost is low

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  • Preparation method for growing silver composite material on surface of mesoporous silica coated gold nanorod
  • Preparation method for growing silver composite material on surface of mesoporous silica coated gold nanorod

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preparation example Construction

[0031] see figure 1 , showing the synthesis method of the gold-silver material 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, the corrosion process, that is, take the gold nanorods that have been cleaned and dispersed in low-concentration cetyltrimethylammonium bromide (CTAB), centrifuge them into a certain amount of NaOH solution, and then add them at intervals of 30 minutes. Add TEOS solution in 6 times and stir for two days to obtain gold nanorods coated with mesoporous silica, then add methanol to the gold nanorods coated with mesoporous silica, place them in an oil bath at 60°C, and control the addition The amount of hydrochloric acid will corrode the gold nanorods.

[0034] Step S3, the re-growth process, that is, take out the corroded gold nanorods coated with silica, then add silver nitrate solution, ascorbic acid solution, and stir for 2 mi...

Embodiment 1

[0048] Mix 10mL CTAB (0.1M) with 0.25mL HAuCl 4 (10mM) mixed in the bottle, mixed with a certain mass of NaBH4 weighed with ice-water mixture to make a 0.01M solution, and added 0.6mL to the bottle and stirred 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 (7000...

Embodiment 2

[0050] 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 preparation method for growing a silver composite material on a surface of a mesoporous silica coated gold nanorod. The preparation method for growing the silver composite material on the surface of the mesoporous silica coated gold nanorod comprises the following steps that firstly, a gold nanorod raw material is prepared, after re-dispersing, a tetraethoxysilane (TEOS) solution is added according to a certain mode, and mesoporous silica grows on the surface of the gold nanorod; firstly, using cetyltrimethylammonium bromide (CTAB) and sodium oleate (NaOL) are used as dual surfactants, and the gold nanorod is synthesized by adopting a seed-mediated method. The preparation method for growing the silver composite material on the surface of the mesoporous silica coated gold nanorod is uniform in growth, and has the advantages of simple reaction conditions, high reaction rate and low cost.

Description

technical field [0001] The invention relates to the field of synthesis of metal nanomaterials, in particular to a method for preparing a silver composite material coated with mesoporous silicon dioxide and grown on the surface of gold nanorods. 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 recent years...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/02B22F9/24B82Y30/00B82Y40/00
CPCB22F9/24B82Y40/00B82Y30/00B22F1/054B22F1/17B22F1/16
Inventor 邓天松张棋卫鸣璋顾伊杰程知群
Owner HANGZHOU DIANZI UNIV
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