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Wet-chemical preparation method for silver micro/nanowires

A nanowire and silver microtechnology, which is applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of the difference in NaOH solution addition, product morphology, complex reaction process, and inconvenient operation. , to achieve the effect of broad industrialization prospects, simple operation and improved safety

Active Publication Date: 2012-10-03
武汉一封材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

(Surfactantless Wet Chemical Synthesis of Silver Nanowires [J]., Caswell, K.K., Bender, C.M., Murphy, C.J.Seedless, NANOLETTERS, 2003, 3 (5): 667-669.) The method reported by Caswell etc., the reaction temperature is high ( At least 100°C), at the same time, the amount of NaOH solution added has a great difference to the shape of the product, the reaction is sensitive, and the operation is inconvenient
[0013] The existing method for preparing silver nanowires has complex reaction process, inconvenient operation, and high reaction temperature, which requires at least 100°C to proceed.

Method used

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  • Wet-chemical preparation method for silver micro/nanowires
  • Wet-chemical preparation method for silver micro/nanowires
  • Wet-chemical preparation method for silver micro/nanowires

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Dissolve 21 mg of silver nitrate and 50 mg of ferrous sulfate in 10 mL of deionized water respectively, and dissolve 19.2 mg of citric acid in 3 mL of deionized water to prepare a citric acid solution. After adding the citric acid solution to the silver nitrate solution, heat the mixed solution to keep it at 50°C, then add 8 mL of ferrous sulfate solution dropwise to the mixed solution, and after the addition is completed in 30 minutes (dropping rate 0.33 mL / min), centrifuged to separate the precipitate, washed several times with deionized water, washed 2-3 times with absolute ethanol, and finally dried in vacuum to obtain silver micro / nanowires. figure 1 It is the SEM figure enlarged 2000 times for the silver micro / nanowire obtained in Example 1; figure 2 It is a 3000 times enlarged SEM image of the silver micro / nano wire obtained in Example 1; image 3 It is the XRD figure of the silver micro / nanowire obtained in Example 1.

Embodiment 2

[0058] Dissolve 10.5 mg of silver nitrate and 50 mg of ferrous sulfate in 10 mL of deionized water, and dissolve 19.2 mg of citric acid in 3 mL of deionized water to prepare a citric acid solution. After adding the citric acid solution to the silver nitrate solution, heat the mixed solution to keep it at 50°C, then add 5mL ferrous sulfate solution dropwise to the mixed solution, after the dropwise addition is completed within 30 minutes, centrifuge to separate the precipitate, and use After washing with deionized water for several times, washing with absolute ethanol for 2-3 times, and finally vacuum drying to obtain silver micro-wires. Figure 4 It is the SEM picture enlarged 2000 times for the silver micro / nanowire obtained in Example 2.

Embodiment 3

[0060] Dissolve 30 mg of silver nitrate and 100 mg of ferrous sulfate in 10 mL of deionized water respectively, and dissolve 32 mg of citric acid and 10 mg of disodium citrate in 3 mL of deionized water to prepare a citric acid solution. After adding the citric acid solution to the silver nitrate solution, heat the mixed solution to keep it at 60°C, then add 5mL ferrous sulfate solution dropwise to the mixed solution, after the dropwise addition is completed within 30 minutes, centrifuge to separate the precipitate, and use After washing with deionized water for several times, washing with absolute ethanol for 2-3 times, and finally vacuum drying to obtain silver micro-wires. Figure 5 It is the SEM picture enlarged 2000 times for the silver micro / nanowire obtained in Example 3.

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Abstract

The invention relates to a preparation method for silver micro / nanowires, which comprises the following steps: adding a templating agent into the aqueous solution of silver salt under the condition of low temperature, adding a reducing agent dropwise, washing and drying to obtain the silver micro / nanowires. The preparation method for the silver micro / nanowires needs low operation temperature, no polymer protecting agent is added, and the materials react in an aqueous medium completely. The preparation method for the silver micro / nanowires is easy to operate and control and has environmental friendly reaction process and low cost.

Description

technical field [0001] The invention relates to a wet chemical preparation method of silver micro / nano wires, belonging to the field of inorganic nano wire materials. Background technique [0002] Compared with bulk materials, metal nanoparticles have high surface energy, special optical properties, thermodynamic properties, physical and chemical properties, especially the synthesis of anisotropic noble metals has become a research hotspot in recent years. Metal nanoparticles play a very important role in many different fields and become a research hotspot, such as providing a model system for experimentally detecting the influence of quantum confinement effects on electrical, magnetic and other related properties; they are also widely used in light imaging , catalysis, biomarkers, photonics, optoelectronics, information storage, and surface enhancement effects. The size, shape, composition, crystallinity, and structure of metal nanoparticles determine their properties. ...

Claims

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Application Information

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IPC IPC(8): B22F9/24B22F1/00B82Y40/00B82Y30/00
Inventor 蔡雄辉孙斌翟爱霞陆凤生冷利忠
Owner 武汉一封材料科技有限公司
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