Preparation method of metal silver nanowires with adjustable length and diameter

A technology for silver nanowires and metallic silver, which is applied in the field of preparing silver nanowires by polyhydroxy reduction method, can solve the problems of cumbersome post-processing process and complicated operation, and achieves the effects of being suitable for industrial production, low reaction temperature and controllable diameter.

Inactive Publication Date: 2012-01-25
UNIV OF JINAN
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  • Abstract
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Problems solved by technology

[0004] In order to overcome the disadvantages of cumbersome post-treatment process and complicated operation in the above method, the present invention provides a method for preparing metallic silver nanowires with adjustable length and diameter, which uses a simplified polyhydric reduction method to prepare synthetic metallic silver Nanowires, the preparation process is simple, no inert gas protection is required, and the reaction conditions are mild

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  • Preparation method of metal silver nanowires with adjustable length and diameter
  • Preparation method of metal silver nanowires with adjustable length and diameter
  • Preparation method of metal silver nanowires with adjustable length and diameter

Examples

Experimental program
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Effect test

Embodiment 1

[0035] 1.1 Heat and stir 5 ml of ethylene glycol at 120°C for 3 h to obtain solution A.

[0036] 1.2 Add 0.085 g AgNO 3 Dissolve in 3 ml ethylene glycol to obtain solution B. At the same time, 0.05 g polyvinylpyrrolidone (K 30 ) and 0.0018 g of sodium chloride were dissolved in another 3 ml of ethylene glycol to obtain solution C. Mix the two solutions and continue stirring for 200 min to obtain solution D.

[0037]1.3 Add solution D dropwise to solution A at a rate of 120 ml / min, stir while adding, and heat and stir the reaction solution at 120°C for 23 h.

[0038] 1.4 After the reaction is completed, the above reaction solution was centrifuged and washed 3 to 4 times with distilled water and absolute ethanol (centrifugal speed 13000 rpm) to remove unreacted polyvinylpyrrolidone (K 30 ) and other impurities. Finally, the washed samples were dispersed in absolute ethanol. figure 1 , figure 2 It is the SEM picture of the silver nanowires synthesized in this example. It ...

Embodiment 2

[0040] 2.1 Heat and stir 5 ml of ethylene glycol at 120°C for 3 h to obtain solution A.

[0041] 2.2 Add 0.085 g AgNO 3 Dissolve in 3 ml ethylene glycol to obtain solution B. 0.1 g polyvinylpyrrolidone (K 30 ) and 0.0018 g of sodium chloride were dissolved in another 3 ml of ethylene glycol to obtain solution C. Mix the two solutions and continue stirring for 140 min to obtain solution D.

[0042] 2.3 The preparation and washing process of the samples are the same as those in Examples 1.3 and 1.4 above, the average diameter of the silver nanowires is 90 nm, and the average length is 1 μm to 10 μm, such as image 3 shown.

Embodiment 3

[0044] 3.1 Heat and stir 5 ml of ethylene glycol at 120°C for 3 h to obtain solution A.

[0045] 3.2 Add 0.085 g AgNO 3 Dissolve in 3 ml ethylene glycol to obtain solution B. 0.15 g polyvinylpyrrolidone (K 30 ) and 0.0018 g of sodium chloride were dissolved in another 3 ml of ethylene glycol to obtain solution C. Mix the two solutions and continue stirring for 80 min to obtain solution D.

[0046] 3.3 The preparation and washing process of the sample is the same as in the above examples 1.3 and 1.4, the average diameter of the silver nanowires is 50 nm, and the average length is 50 μm ~ 60 μm, such as Figure 4 shown.

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Abstract

The invention discloses a preparation method of metal silver nanowires with adjustable length and diameter. The method comprises the following steps: dissolving silver nitrate in polyhydric alcohol for preparing solution; dissolving an alkali metal halide and a reducing compound in the polyhydric alcohol for preparing the solution; mixing the two types of the solution, and fully reacting under stirring to get the mixed solution; heating the polyhydric alcohol to 120-160 DEG C, dripping into the mixed solution, keeping the temperature and reacting for 15-44 hours; and performing centrifugal separation on reaction solution after the reaction, and washing lower-layer precipitate to get the silver nanowires. According to the preparation method, inert gas does not need to be introduced for protection, the reaction temperature is low, the preparation process is simple, the yield is high, the cost is low, and the insufficiencies of complex preparation procedure, low yield, high cost and the like in the template plate, the seeding method, the traditional polyhydroxy reduction method and the like can be overcome, thereby having important significance for large-batch industrial production and actual application thereof of the silver nanowires.

Description

technical field [0001] The invention relates to a method for preparing metallic silver nanowires, in particular to a method for preparing silver nanowires by a polyhydroxyl reduction method with adjustable length and diameter. Background technique [0002] In recent years, one-dimensional noble metal nanomaterials have gradually become a hot topic in nanomaterials research because of their potential applications in electronics, optical devices, and sensors. Due to the surface plasmon resonance absorption properties of one-dimensional noble metal nanomaterials, they produce strong light absorption in the ultraviolet and visible light spectrum ranges, so this feature can be used to enhance other linear and nonlinear properties, such as fluorescence and Raman scattering. In addition, the maximum absorption peak is related to the dielectric constant of the environment. From this aspect, one-dimensional noble metal nanomaterials can be used in the preparation of sensors, electron...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24C30B29/02C30B29/62
Inventor 杨萍张玉兰曹永强张爱玉马谦
Owner UNIV OF JINAN
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