Ultrafine metal nano frame and preparation method thereof

A metal nano and nano technology, applied in the field of nano materials and their preparation methods, can solve the problems of lack of plasmon resonance performance and restrict application, and achieve the effects of mild conditions, simple preparation conditions and high purity

Active Publication Date: 2019-08-02
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, since the frame of ultrafine nanoframes is very thin (less than 5nm), for various noble metals (gold, silver, palladium, platinum, etc.), the single-metal or multi-metal ultrafine nanoframes composed of them are in the visible and near-infrared The field does not have excellent plasmon resonance properties (such as J.Am.Chem.Soc.2011, 133, 8066-8069; Science 2014, 343, 1339-1343), which greatly restricts this unique nanostructure Applications in the field of photocatalysis

Method used

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  • Ultrafine metal nano frame and preparation method thereof
  • Ultrafine metal nano frame and preparation method thereof
  • Ultrafine metal nano frame and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0018] Step 1, add 1mL gold nano biconical solution to 10mL, 0.08mol / L cetyltrimethylammonium chloride solution, then add 250μL, 0.01mol / L silver nitrate solution and 125μL, 0.1mol / L Ascorbic acid solution, the obtained mixed solution was shaken and put into a 60°C oven for 5h to react to obtain silver nanorods;

[0019] Step 2, silver nanorods are centrifuged at 5000rpm for 10min, then dispersed in 4mL, 0.05mol / L cetyltrimethylammonium bromide solution, add 1mL, 0.2mol / L sodium hydroxide solution and 1mL, 0.1mol / L ascorbic acid solution, slowly add 1.6mL, 0.1mmol / L chloropalladium acid reaction solution dropwise at a rate of 20μL / min at room temperature, and the reaction time is 2h;

[0020] Step 3, centrifuge the sample obtained in step 2 at 6000rpm for 10min, then disperse in 3mL, 0.005mol / L cetyltrimethylammonium bromide solution, add 0.1mL, 14mol / L ammonia solution and 2mL, 5mol / L hydrogen peroxide solution, and react at room temperature for 12 hours to obtain ultrafine...

Embodiment 2

[0024] Step 1, add 1mL gold nano biconical solution to 50mL, 0.01mol / L cetyltrimethylammonium chloride solution, then add 600μL, 0.01mol / L silver nitrate solution and 300μL, 0.1mol / L ascorbic acid solution, shake the obtained mixed solution and put it in a 40°C oven for 8 hours to obtain silver nanorods;

[0025] Step 2, centrifuge the silver nanorods at 5000rpm for 10min, then disperse them in 4mL, 0.01mol / L cetyltrimethylammonium bromide solution, add 1mL, 0.1mol / L sodium hydroxide solution and 1mL, 0.1mol / L ascorbic acid solution, slowly add 2mL, 0.1mmol / L chloroauric acid reaction solution dropwise at a rate of 10μL / min at room temperature, and the reaction time is 1h;

[0026] Step 3, centrifuge the sample obtained in step 2 at 6000rpm for 10min, then disperse in 10mL, 0.003mol / L cetyltrimethylammonium bromide solution, add 10mL, 1mol / L ammonia solution and 20mL, 1mol / L ammonia solution respectively L hydrogen peroxide solution, reacted at room temperature for 24 hours t...

Embodiment 3

[0028] Step 1, add 1mL gold nano biconical solution to 10mL, 0.1mol / L cetyltrimethylammonium chloride solution, then add 10μL, 0.1mol / L silver nitrate solution and 10μL, 1mol / L ascorbic acid solution , shake the obtained mixed solution and put it in an oven at 80°C for 1 hour to react to obtain silver nanorods;

[0029] Step 2, centrifuge the silver nanorods at 5000rpm for 10min, then disperse them in 4mL, 0.05mol / L cetyltrimethylammonium bromide solution, add 0.1mL, 1mol / L sodium hydroxide solution and 0.1mL , 1mol / L ascorbic acid solution, and slowly add 0.1mL, 0.5mmol / L chloropalladium acid reaction solution dropwise at a rate of 30 μL / min at room temperature, and the reaction time is 3h;

[0030] Step 3, centrifuge the sample obtained in step 2 at 6000rpm for 10min, then disperse in 10mL, 0.1mol / L cetyltrimethylammonium bromide solution, add 0.1mL, 14mol / L ammonia solution and 0.5mL, 5mol / L hydrogen peroxide solution, and react at room temperature for 24 hours to obtain u...

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Abstract

The invention discloses an ultrafine metal nano frame and a preparation method thereof. The superfine metal nano frame is supported by a nano double cone, the metal nano frame comprises silver atoms and reaction atoms, the nano double cone comprises gold atoms, and the reaction atoms are the gold atoms, palladium atoms or platinum atoms. The preparation method comprises the following steps: a, a gold nano-double-cone solution is added into a cetyl trimethyl ammonium chloride solution, a silver nitrate solution and an ascorbic acid solution are added, and the mixed solution is uniformly shakenin a drying oven to obtain a silver nanorod; b, the silver nanorod is centrifued in a cetyl trimethyl ammonium bromide solution, a sodium hydroxide solution and an ascorbic acid solution are added, and a reaction solution is slowly dropped at room temperature; and c, the sample obtained in the step b is centrifuged in the cetyl trimethyl ammonium bromide solution, an ammonia water solution and a hydrogen peroxide solution are added, and the sample reacts at room temperature. The preparation method is simple in preparation condition, the sample is obtained through the template growth and re-etching process, the conditions are mild, and the operability is high.

Description

technical field [0001] The invention relates to a nanometer material and a preparation method thereof, in particular to an ultrafine metal nanoframe and a preparation method thereof. Background technique [0002] Due to their unique optical, electric and magnetic properties, noble metal nanoparticles have attracted extensive attention and applications in the fields of catalysis, electronics, photonics, information storage, energy conversion and biomedicine. Since these metals are extremely low in the earth's crust and expensive, there is an urgent need to expand technological means that can effectively utilize these metals. In recent years, researchers have developed many strategies to enhance the catalytic activity of noble metal nanocrystals, thereby reducing their loading in catalysts. Combining the advantages of hollowness and ultrathinness, ultrafine metal nanoframes can greatly improve the utilization efficiency of precious metals, and are particularly excellent among...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24B22F1/00B82Y30/00B82Y40/00
CPCB22F9/24B82Y30/00B82Y40/00B22F1/0553B22F1/07B22F1/054
Inventor 朱兴忠徐娟王长顺阚彩侠
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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