Quick and efficient synthesis method for silver nanowires

A technology of silver nanowires and synthesis methods, which is applied in the field of rapid and efficient synthesis of silver nanowires, can solve the problems of long reaction time, low reaction concentration, and low selectivity of nanowires, and achieve short reaction time, high reaction efficiency, and improved The effect of preparation efficiency

Inactive Publication Date: 2011-01-05
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the existing technical conditions still have a certain distance from the real large-scale industrial production of silver nanowires.
The main pro

Method used

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  • Quick and efficient synthesis method for silver nanowires
  • Quick and efficient synthesis method for silver nanowires
  • Quick and efficient synthesis method for silver nanowires

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 1) Pass inert gas into the reactor, add 10ml of ethylene glycol, stir, heat to about 180°C, condense and reflux, and preheat for 25min; quickly add 5ml of silver nitrate ethylene glycol solution with a molar concentration of 0.1M, At the same time, slowly drop 10ml of PVP with a molar concentration of 0.15M and MnCl of 16μM 2 The mixed ethylene glycol solution was added dropwise for 10 minutes, reacted for 90 minutes, and cooled to room temperature to obtain the reaction mother liquor of silver nanowires.

[0025] 2) Transfer the silver nanowire reaction mother liquid into a centrifuge tube, add acetone with 2 times the volume of the reaction mother liquid, centrifuge at a speed of 2700rpm, remove the supernatant, leave the precipitate, add 2 times the volume of the reaction mother liquid Deionized water or ethanol is centrifuged at 2700 rpm, the supernatant is removed, and the precipitate is left. Repeat this operation twice, and the precipitate is extracted and disper...

Embodiment 2

[0028] 1) Pass inert gas into the reactor, add 10ml of ethylene glycol, stir, heat to about 180°C, condense and reflux, and preheat for 10 minutes; quickly add 5ml of silver nitrate ethylene glycol solution with a molar concentration of 0.1M, At the same time, slowly drop 10ml of PVP with a molar concentration of 0.15M and MnCl of 16μM 2 The mixed ethylene glycol solution was added dropwise for 10 minutes, reacted for 25 minutes, and cooled to room temperature to obtain the reaction mother liquor of silver nanowires.

[0029] 2) Transfer the silver nanowire reaction mother liquid into a centrifuge tube, add acetone with 1 times the volume of the reaction mother liquid, centrifuge at a speed of 2500rpm, remove the supernatant, leave the precipitate, add 1 times the volume of the reaction mother liquid Deionized water or ethanol is centrifuged at 2500 rpm, the supernatant is removed, and the precipitate is left. This operation is repeated twice, and the precipitate is extracted ...

Embodiment 3

[0032] 1) Pass inert gas into the reactor, add 10ml of ethylene glycol, stir, heat to about 180°C, condense and reflux, and preheat for 25min; quickly add 5ml of silver nitrate ethylene glycol solution with a molar concentration of 0.1M, At the same time, slowly drop 10ml of PVP with a molar concentration of 0.15M and MnCl of 16μM 2 The mixed ethylene glycol solution was added dropwise for 10 minutes, reacted for 8 minutes, and cooled to room temperature to obtain the reaction mother liquor of silver nanowires.

[0033] 2) Move the silver nanowire reaction mother liquid into a centrifuge tube, add acetone with 2 times the volume of the reaction mother liquid, centrifuge at a speed of 2500rpm, remove the supernatant, leave the precipitate, add 2 times the volume of the reaction mother liquid Deionized water or ethanol is centrifuged at 2500 rpm, the supernatant is removed, and the precipitate is left. This operation is repeated three times, and the precipitate is extracted and ...

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Abstract

The invention discloses a quick and efficient synthesis method for silver nanowires. The method comprises the following steps of: 1) introducing inert gas into a reactor, adding 2 volume parts of glycol into the reactor, and stirring, heating, condensing and refluxing the glycol; quickly adding 1 volume part of glycol solution of silver nitrate at molar concentration of between 0.1 and 0.5m into the reactor; slowly dropwise adding 1 to 2 volume parts of PVP at molar concentration of between 0.15 and 0.75m and 4 to 32 mu m of glycol solution of MnCl2 at the same time; and reacting and cooling the mixture to the room temperature to obtain reaction mother liquor of the silver nanowires; and 2) transferring the reaction mother liquor of the silver nanowires into a centrifugal tube; adding acetone into the centrifugal tube and performing centrifugal separation to remove supernatant and retain precipitate; adding de-ionized water or ethanol into the centrifugal tube and performing centrifugal separation to remove the supernatant and retain precipitate, and repeating the operation for 1 to 3 times; and extracting and dispersing the precipitate with ethanol to obtain the silver nanowires. The method shortens the reaction time and also has high selectivity for the synthesis of the silver nanowires under conditions of high concentration.

Description

technical field [0001] The invention relates to the technical field of nanomaterial synthesis, in particular to a rapid and efficient synthesis method of silver nanowires. Background technique [0002] Silver nanowires not only have the high electrical and thermal conductivity of ordinary silver, but also have the characteristics of high specific surface area at nanometer size, excellent optical properties, and unique quantum effects. Therefore, the research on the synthesis of silver nanowires has also attracted widespread attention and attention, especially the research on its large-scale and efficient synthesis process, which has great significance and influence on the real large-scale commercial application of silver nanowires. [0003] In recent years, many researchers have carried out research on the synthesis of silver nanowires and achieved many results. At present, the most widely used synthesis method of silver nanowires is the method proposed by Xia et al. to red...

Claims

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Application Information

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IPC IPC(8): B22F9/24
Inventor 颜光清王立桂磊俞豪杰李晓晓
Owner ZHEJIANG UNIV
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