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Method for simply preparing Au-Ag dual-metal nanoparticle film of meshed structure

A bimetallic nano, network structure technology, applied in nanotechnology, metal processing equipment, transportation and packaging, etc., can solve the problems of large size of hollow nanoparticles and uneven network structure formation, and achieve good stability and reaction conditions. Gentle, simple and quick results

Inactive Publication Date: 2016-12-07
SHAANXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Yongdong Jin's group (ACS Appl. Mater. Interfaces 2016, 8, 1594-1599) prepared a Ag-Au bimetallic mesh nanoparticle film with a hollow structure, but the synthesis process required heating and boiling, and the prepared The size of hollow nanoparticles is large, and the network structure is formed unevenly

Method used

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  • Method for simply preparing Au-Ag dual-metal nanoparticle film of meshed structure
  • Method for simply preparing Au-Ag dual-metal nanoparticle film of meshed structure
  • Method for simply preparing Au-Ag dual-metal nanoparticle film of meshed structure

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Effect test

Embodiment 1

[0030] 1. Synthesis of Ag-containing Au seeds

[0031] Add 0.5mL 0.01mol / L silver nitrate aqueous solution, 1.5mL 0.01mol / L tetrachloroalloy acid aqueous solution, 1mL 0.01mol / L sodium citrate aqueous solution into 60mL deionized water, stir at room temperature for 30 minutes, and then 2.6 mL of freshly prepared 0.01 mol / L sodium borohydride aqueous solution was added dropwise, and stirring was continued for 4 hours after the dropwise addition to obtain a wine-red dispersion, that is, Ag-containing Au seeds.

[0032] Adopt JEM-2100 type transmission electron microscope and U-3900 / 3900H type (Japan Hitachi) ultraviolet-visible spectrophotometer to carry out characterization to gained sample, the result sees Figure 1~3 . Depend on Figure 1~2 It can be seen that the Ag-containing Au seeds have uniform size and good monodispersity, and the particle size is about 3-5 nm. image 3 The surface plasmon resonance absorption peak of nano-Au appears at 520nm in the ultraviolet-visib...

Embodiment 2

[0037] Step 1 of this embodiment is the same as that of Embodiment 1. In step 2 of preparing the Au-Ag bimetallic nanoparticle film, add 15 mL of Ag-containing Au seeds obtained in step 1 into 16 mL of 0.0006 mol / L silver nitrate aqueous solution, and add 2 mL of 0.1 mol / L ascorbic acid aqueous solution, and stir at room temperature In 10 minutes, a layer of Au-Ag bimetallic nanoparticle film was formed at the water-air interface (see Figure 9 ).

Embodiment 3

[0039] Step 1 of this embodiment is the same as that of Embodiment 1. In step 2 of preparing the Au-Ag bimetallic nanoparticle film, 15mL of the Ag-containing Au seeds obtained in step 1 were added to 16.5mL of 0.0009mol / L silver nitrate aqueous solution, and 3mL of 0.1mol / L ascorbic acid aqueous solution was added. Stir for 10 minutes to form a layer of Au-Ag bimetallic nanoparticle film at the water-air interface (see Figure 10 ).

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Abstract

The invention discloses a method for simply preparing an Au-Ag dual-metal nanoparticle film of a meshed structure. According to the method, a small quantity of AgNO3 is added in the synthetic process of Au seeds, Ag+ is stably adsorbed to the surfaces of Au nanoparticles, and thus the Au nanoparticles have anisotropy in the growing process; and then the Au nanoparticles containing Ag are used as seeds, no inductive agent needs to be added, and the Au-Ag dual-metal nanoparticle film which is of the meshed structure and has a clean surface can be obtained through self-assembling on a gas-liquid interface under the normal temperature condition. The method is simple and rapid, reaction conditions are mild, no inductive agent or organic solvent needs to be added, and the prepared nanoparticle film has extremely good stability and has potential application value in the aspects of surface-enhanced raman, plasma nanometer circuits, nanophotonics, electro-catalysis and new energy application. The method can also be used for preparing other dual-metal nanoparticle film materials.

Description

technical field [0001] The invention belongs to the technical field of preparation of metal nanoparticle films, and in particular relates to a method for preparing a network-structured Au-Ag bimetallic nanoparticle film. Background technique [0002] Compared with single-particle nano-metals, metal nano-particle film materials with a two-dimensional assembly structure have more effective charge transport and energy transport due to the interaction between its assembly units, so it has more Rich collection properties and synergies. At the same time, this assembly structure greatly improves the dispersion stability of nano-metals, and can provide the possibility for further application and deviceization of nano-metals. The gold-silver bimetal composite nanostructure formed by nano-gold and silver has the properties of both metals, and the interface performance and electronic structure of the composite structure of the two nano-metals can endow the bimetal with excellent physi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24B22F1/00B82Y40/00
CPCB82Y40/00B22F9/24B22F1/14
Inventor 张颖左园闫森
Owner SHAANXI NORMAL UNIV
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