Preparation method of gold nanorod-palladium composite material

A technology of gold nanorods and composite materials, which is applied in the field of synthesis of noble metal nanomaterials, can solve the problems of uneven synthesis results, low synthesis efficiency of gold nanorods-palladium composite materials, etc., and achieve stable products, simple and reliable synthesis methods sexual effect

Pending Publication Date: 2021-05-28
HANGZHOU DIANZI UNIV
View PDF0 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of low synthesis efficiency of gold nanorod-palladium composite material and uneven final synthesis result, the present invention provides a synthesis method of gol

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of gold nanorod-palladium composite material
  • Preparation method of gold nanorod-palladium composite material

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0031] see figure 1 , showing the synthesis method of the mesoporous silica-coated gold nanorod-palladium composite material proposed by the present invention, specifically comprising the following steps:

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

[0033] Step S2, the etching and silica coating process, that is, take the gold nanorods that have been washed and dispersed in 2mM CTAB, centrifuge them into a certain amount of NaOH solution, and then add the TEOS solution in 6 times at intervals of 30 minutes, Stir for 2 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, control the amount of hydrochloric acid added, and gold nanorods The rod corrodes.

[0034] Step S3, the regrowth process, that is, take out the corroded gold nanorods coated with silicon dioxide, then add sodium tetrachloropalladate solution and ascorbic acid solution,...

Embodiment 1

[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 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

[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)...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Lengthaaaaaaaaaa
Diameteraaaaaaaaaa
Login to view more

Abstract

The invention discloses a preparation method of a gold nanorod-palladium composite material. The preparation method comprises the following steps of firstly, preparing a gold nanorod raw material, re-dispersing, adding a tetraethoxysilane (TEOS) solution in a certain manner, growing mesoporous silica on the surface of a gold nanorod, then the gold nanorod coated with silicon dioxide is placed in an oil bath at the temperature of 60 DEG C to be heated, a corrosion process is started by adding a corresponding amount of hydrochloric acid, then the corrosion is finished by adding a large amount of cold methanol, centrifuging a product (8000rpm, 10min), and dispersing obtained precipitate in an aqueous solution, and finally, adding a corresponding amount of a sodium tetrachloropalladate solution, then adding a corresponding amount of an ascorbic acid solution, stirring for 1 minute to obtain a final product, and observing growth condition through a transmission electron microscope graph. The gold nanorod-palladium composite material prepared by the preparation method is uniform in growth; the preparation method has simple reaction conditions, high reaction rate and low cost.

Description

technical field [0001] The invention relates to the field of synthesis of noble metal nanometer materials, in particular to a method for preparing a gold nanorod-palladium composite 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 characteristics, 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, the excellent properties of bimetallic structu...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): B22F9/24B22F1/02B22F1/00B82Y30/00B82Y40/00
CPCB22F9/24B82Y30/00B82Y40/00B22F1/07B22F1/054B22F1/17B22F1/16B22F1/145
Inventor 邓天松张棋卫鸣璋顾伊杰程知群
Owner HANGZHOU DIANZI UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap