A metal nanoframe with an array structure and its preparation method and application

A metal nano and array structure technology, applied in metal processing equipment, nanotechnology for materials and surface science, nanotechnology, etc., can solve the problem of not fully utilizing plasmonic metals, restricting large-scale application of nanostructures, Complex structural synthesis and other issues, to achieve the effect of enriching catalytic active sites, good plasmon effect, and high repeatability

Active Publication Date: 2022-04-19
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, the synthesis of these alloy structures is relatively complex
In order to enhance the stability of the catalyst, a large number of complex processes are used, and it takes a long time for structural evolution and complicated processing methods, which greatly restricts the large-scale application of this unique nanostructure (such as Science, 2014, 343, 1339 -1343)
In addition, in the frame structure, the advantages of plasmonic metals (such as gold) are not fully utilized, which restricts the competitiveness of this type of structure in the field of photocatalysis.

Method used

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  • A metal nanoframe with an array structure and its preparation method and application
  • A metal nanoframe with an array structure and its preparation method and application
  • A metal nanoframe with an array structure and its preparation method and application

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preparation example Construction

[0028] The metal nanoframe has a purity of 99% and an absorbance of 2. The preparation method of metal nano frame solution comprises the following steps:

[0029] (1) Add 1 mL of gold nano-bipyramid 1 solution to 10 mL, 0.08 mol / L cetyltrimethylammonium chloride solution, and then add 125 μL, 0.1 mol / L ascorbic acid solution and 250 μL, 0.01 mol / L ascorbic acid solution to it. L AgNO 3 solution, shake the mixed solution evenly, put it in an oven at 60°C, and react for 5 hours to obtain silver nanorods;

[0030] (2) Centrifuge the silver nanorods obtained in step (1) at 5000rpm for 10min, then disperse them in 4mL, 0.05mol / L cetyltrimethylammonium bromide solution, add 1mL, 0.1mol / L L of ascorbic acid solution and 1mL, 0.2mol / L NaOH solution, at room temperature, slowly add 1.6mL, 0.1mmol / L chloropalladium acid reaction solution dropwise at a rate of 20μL / min, and react for 2h;

[0031] (3) Centrifuge the sample obtained in step (2) at 6000rpm for 10min, then disperse it int...

Embodiment 1

[0034] Such as figure 1 , a method for preparing a metal nanoframe of an array structure 3, comprising the following steps:

[0035] (a) Add 1mL metal nanoframe solution to 10mL, 10mmol / L surfactant cetylpyridinium chloride solution, then add 90μL, 1mmol / L chloropalladium acid solution and 90μL, 10mmol / L ascorbic acid solution;

[0036] (b) Shake the solution obtained in step a, and react in an oven at 65° C. for 0.5 h to obtain the metal nanoframe of palladium array structure 3 .

[0037] Such as figure 2 , the metal nano frame that the present embodiment makes comprises gold nano bicone 1 and outer layer frame body 2, and outer layer frame body 2 is the gold-silver alloy that is made up of silver atom and gold atom, and evenly distributes palladium on the outer layer frame body 2 Array structure3. Outer layer frame body 2 comprises point one 21, point two 22 and connecting rod 23, and point one 21, point two 22 are regular pentagonal pyramids and are arranged symmetrical...

Embodiment 2

[0041] A method for preparing a metal nanoframe of an array structure 3, comprising the following steps:

[0042] (a) Add 1mL metal nanoframe solution to 10mL, 1mmol / L surfactant cetylpyridinium chloride solution, then add 90μL, 5mmol / L chloroplatinic acid solution and 90μL, 30mmol / L ascorbic acid solution;

[0043] (b) Shake the solution obtained in step a, and react in an oven at 30° C. for 17 hours to obtain the metal nanoframe of the platinum array structure 3 .

[0044]The metal nanoframe prepared in this embodiment includes a gold nanobicone 1 and an outer frame 2, the outer frame 2 is a gold-silver alloy, and a single platinum array structure 3 with a length of 5 nm is evenly distributed on the outer frame 2 . Outer layer frame body 2 comprises point one 21, point two 22 and connecting rod 23, and point one 21, point two 22 are regular pentagonal pyramids and are arranged symmetrically about connecting rod 23, and connecting rod 23 is connected with point one respectiv...

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Abstract

The invention discloses a metal nano frame with an array structure, which includes a gold nano double cone and an outer frame body, the outer frame body includes silver atoms and gold atoms, and the array structure is evenly distributed on the outer layer frame body. The invention also discloses a method for preparing a metal nanoframe with an array structure, which includes the following steps: adding the metal nanoframe solution to the cetylpyridinium chloride solution, and then adding a chloropalladium acid solution or a chloroplatinic acid solution, and an ascorbic acid solution; shaking the obtained solution evenly, and reacting in an oven at 30-90° C. to obtain a metal nano frame with an array structure. The invention also discloses the application of the metal nano frame with the array structure in photoelectric catalysis. The metal nanoframe structure of the array structure prepared by the invention has high purity and high repeatability, and has potential applications in the fields of photoelectric catalysis, sensing and photochemistry; the preparation condition is simple, the condition is mild, and the operability is strong.

Description

technical field [0001] The invention belongs to a metal nano frame and its preparation method and application, in particular to a metal nano frame with an array structure and its preparation method and application. Background technique [0002] Due to their unique optical and electric field properties, noble metal nanoparticles have a wide range of applications in catalysis, electronics, photonics and other fields. Many research results in recent years have shown that its physical and chemical properties are related to the size, shape and surface atom types of nanoparticles. Therefore, the purpose of adjusting the properties of nanoparticles can be achieved by adjusting the size of nanoparticles and surface modification species. However, precious metals are expensive, and the single catalytic metals (platinum, palladium, etc.) have weak anti-toxicity and low stability. To overcome these limitations, it is necessary to control the structure and size of catalysts to achieve e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F1/054B22F9/24B82Y40/00B82Y30/00C25B11/097C25B3/23C25B3/07C25B3/21
CPCB22F9/24B82Y40/00B82Y30/00B22F1/07
Inventor 朱兴忠恽沁茹徐娟阚彩侠
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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