Method for preparing gold nanorod material through reduction of hydroquinone under double surfactants

A dual-surfactant, hydroquinone technology, applied in nanotechnology, nanotechnology, nanotechnology and other directions for materials and surface science, can solve the problems affecting the monodispersity and practicability of products, and many impurities, etc. Achieve the effect of monodispersity and purity improvement

Pending Publication Date: 2021-06-18
HANGZHOU DIANZI UNIV
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

Ascorbic acid is widely used in the field of gold nanorod synthesis as an excellent reducing agent, but in the traditional synthesis process, the quality of gold nanorod products is greatly affected by it, and in many cases, slight changes will lead to impurities in the product Too much will affect the monodispersity and practicability of the product

Method used

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  • Method for preparing gold nanorod material through reduction of hydroquinone under double surfactants
  • Method for preparing gold nanorod material through reduction of hydroquinone under double surfactants

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preparation example Construction

[0024] see figure 1 , as the preparation method of the gold nanomaterials grown under the low surfactant concentration that the present invention proposes, specifically comprise the following steps

[0025] Step S1, preparing a seed solution.

[0026] Step S2, preparing a growth solution and performing growth. The C-C double bond in sodium oleate will grow Au in solution 3+ Reverted to Au + , adding hydroquinone to Au + reduced to Au, Ag +

[0027] The purpose is to adjust the conversion rate and morphology of gold nanorods, and interact with CTAB to make gold nanocrystals grow into rods along both ends.

[0028] Step S3, washing and purifying the growth solution, extracting gold nanorod samples by centrifugation,

[0029] Dispersed in surfactant solution to prevent agglomeration.

[0030] Wherein, the step S1 includes the following steps:

[0031] S10: Mix 10mL 0.1M CTAB with 0.25mL 10mM HAuCl 4 Mix in the bottle, use the ice-water mixture and weighed a certain amou...

Embodiment 1

[0039] Mix 10mL CTAB (0.1M) with 0.25mL HAuCl 4 (10mM) is mixed in the bottle, and a certain mass of NaBH 4Mix 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. 18.5 mL of CTAB (0.1 M) and 0.124 g of NaOL were dissolved in 29 mL of water at 50°C. After dissolution, the solution was cooled to 30 °C, and then 1.8 mL of AgNO was added 3 (4mM) solution. and kept at 30°C for 15 minutes, then added 0.5mL HAuCl 4 (10mM). After 60-90 minutes of stirring (400 rpm), the solution changed from golden yellow to colorless. This is the growth solution. To the growth solution was added sequentially 800 μL hydroquinone solution (0.1 M), 80 μL seed solution with vigorous stirring (1200 rpm). The final solution was left to stand for 12 hours in a 30°C water bath.

Embodiment 2

[0041] 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. 18.5 mL of CTAB (0.1 M) and 0.124 g of NaOL were dissolved in 29 mL of water at 50°C. After dissolution, the solution was cooled to 30 °C, and then 1.8 mL of AgNO was added 3 (4mM) solution. and kept at 30°C for 15 minutes, then added 0.5mL HAuCl 4 (10mM). After 60-90 minutes of stirring (400 rpm), the solution changed from golden yellow to colorless. This is the growth solution. 1000 μL of hydroquinone solution (0.1 M), 80 μL of seed solution were added sequentially to the growth solution with vigorous stirring (1200 rpm). The final solution was left to stand for 12 hours in a 30°C water bath.

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Abstract

The invention discloses a method for preparing a gold nanorod material through reduction of hydroquinone under the action of double surfactants, and under the combined action of cetyl trimethyl ammonium bromide (CTAB) and sodium oleate (NaOL), gold nanorods are synthesized by adopting a seed-mediated method. The method comprises the following steps: mixing a certain amount of CTAB and chloroauric acid (HAuCl4) in a bottle, then adding sodium borohydride (NaBH4) prepared from an ice-water mixture, and vigorously stirring for 2 minutes by a magnetic stirrer until the solution becomes brown yellow from golden yellow; leaving the mixture to stand for 30 minutes to obtain a seed solution; dissolving CTAB and NaOL with corresponding low concentrations in another bottle at 50 DEG C to serve as a growth solution, cooling the growth solution to about 30 DEG C, and then adding silver nitrate (AgNO3) and chloroauric acid, and conducting stirring at room temperature for 60-90 minutes to enable the solution to become clear from golden yellow; adding hydroquinone and the seed solution sequentially; and conducting vigorous stirring by using a magnetic stirrer, and leaving the mixture to stand for 12 hours at a constant temperature of 30 DEG C to obtain a final product.

Description

technical field [0001] The invention relates to the field of preparation of photonic nano crystal materials, in particular to a method for preparing gold nanorod materials by reducing hydroquinone under double surfactants. Background technique [0002] In recent years, gold nanorods have attracted extensive attention due to their promising applications in biomedicine, sensing, optics, imaging and other fields. Since the parameters such as the length, width, and aspect ratio of these gold nanorods greatly affect the role and role of such materials in the above fields, it is necessary to explore better synthesis methods to obtain high monodispersity, wide adjustable range, A gold nanorod material with high conversion rate is very meaningful. In 2013, Murray et al. proposed a dual-surfactant synthesis and followed the traditional approach using ascorbic acid in the growth solution. Ascorbic acid is widely used in the field of gold nanorod synthesis as an excellent reducing ag...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24B22F1/00B82Y5/00B82Y15/00B82Y20/00B82Y30/00B82Y40/00
CPCB22F9/24B82Y5/00B82Y15/00B82Y20/00B82Y30/00B82Y40/00B22F1/07B22F1/054
Inventor 邓天松卫鸣璋张棋顾伊杰程知群
Owner HANGZHOU DIANZI UNIV
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