Hydrothermal synthesis method of silver nanowire with high length-diameter ratio

A technology of silver nanowires and hydrothermal synthesis, which is applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of poor controllability, cumbersome methods of silver nanowires, long diameter and long diameter of silver nanowires The diameter can not be taken into account, etc., to achieve the effect of less impurities, simple and easy synthesis method, and high purity

Pending Publication Date: 2021-03-16
HARBIN INST OF TECH
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  • Abstract
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Problems solved by technology

[0004] The present invention aims to solve the problems in the prior art that the length and diameter of silver nanowires cannot be balanced, and the method for preparing silver nanowires is cumbersome and poorly controllable

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  • Hydrothermal synthesis method of silver nanowire with high length-diameter ratio
  • Hydrothermal synthesis method of silver nanowire with high length-diameter ratio
  • Hydrothermal synthesis method of silver nanowire with high length-diameter ratio

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preparation example Construction

[0034] Based on this, an embodiment of the present invention provides a method for hydrothermal synthesis of silver nanowires with high aspect ratio, comprising the following steps:

[0035] Mix the polyvinylpyrrolidone aqueous solution, the silver nitrate aqueous solution, the control agent aqueous solution, and the reducing agent aqueous solution uniformly to prepare a reaction solution, wherein the concentration of silver nitrate in the reaction solution is not higher than the concentration of the control agent;

[0036] Under airtight conditions, the reaction solution is subjected to hydrothermal reaction to prepare a mother liquid containing silver nanowires, and the mother liquid containing silver nanowires is subjected to subsequent treatment to obtain a dispersion liquid containing silver nanowires.

[0037] Embodiments of the present invention make most of the silver ions in the reaction solution combine with the anions in the control agent to form a hard-ionized subst...

Embodiment 1

[0058] This embodiment provides a method for hydrothermal synthesis of high aspect ratio silver nanowires, comprising the following steps:

[0059] 1.1 Take by weighing glucose and galactose according to the molar ratio of 1:1, as reducing agent, then take by weighing sodium chloride and sodium carbonate as the control agent according to the molar ratio of sodium chloride and sodium carbonate as 1:0.2; As a solvent, prepare respectively a silver nitrate aqueous solution with a concentration of 100mmol / L, an aqueous solution of polyvinylpyrrolidone with a concentration of 100mmol / L (wherein the average molecular weight of polyvinylpyrrolidone is 360,000), an aqueous solution of a reducing agent with a concentration of 300mmol / L and a concentration of 100mmol / L of the control agent aqueous solution;

[0060] 1.2 At room temperature, add 4.8mL distilled water, 0.05mL polyvinylpyrrolidone aqueous solution, 0.05mL silver nitrate aqueous solution, 0.05mL control agent aqueous solut...

Embodiment 2

[0064] This embodiment provides a method for hydrothermal synthesis of high aspect ratio silver nanowires, comprising the following steps:

[0065] 2.1 Take by weighing glucose and galactose according to the molar ratio of 1:1, as the reducing agent, then take by weighing sodium chloride and sodium carbonate as the control agent according to the molar ratio of sodium chloride and sodium carbonate as 1:0.2; As a solvent, prepare respectively a silver nitrate aqueous solution with a concentration of 100mmol / L, an aqueous solution of polyvinylpyrrolidone with a concentration of 100mmol / L (wherein the average molecular weight of polyvinylpyrrolidone is 360,000), an aqueous solution of a reducing agent with a concentration of 300mmol / L and a concentration of 100mmol / L of the control agent aqueous solution;

[0066] 2.2 At room temperature, add 4.775mL of distilled water, 0.05mL of polyvinylpyrrolidone aqueous solution, 0.05mL of silver nitrate aqueous solution, 0.075mL of control ...

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Abstract

The invention provides a hydrothermal synthesis method of a silver nanowire with a high length-diameter ratio. The method comprises the following steps of uniformly mixing a polyvinylpyrrolidone aqueous solution, a silver nitrate aqueous solution, a control agent aqueous solution and a reducing agent aqueous solution to prepare a reaction solution, wherein the concentration of silver nitrate in the reaction solution is not higher than the concentration of a control agent; and under a closed condition, carrying out hydrothermal reaction on the reaction solution to prepare a mother solution containing the silver nanowire, and carrying out subsequent treatment on the mother solution containing the silver nanowire to obtain dispersion liquid containing the silver nanowire. According to the synthesis method, the silver nanowire with the high length-diameter ratio can be prepared, and the diameter of the silver nanowire is small; and since tedious seed crystal preparation and complex condition control are not needed, the synthesis method is easy and convenient to implement and good in controllability.

Description

technical field [0001] The invention relates to the technical field of nanomaterial preparation, in particular to a hydrothermal synthesis method of silver nanowires with high aspect ratio. Background technique [0002] Silver nanowire is a highly conductive one-dimensional nanowire material. The conductive film made of silver nanowire network has good conductivity, light transmission and bendability. It is used in new flexible optoelectronics, energy and sensor devices. and other fields have been extensively studied. The silver nanowire itself has good conductivity. The resistance of the conductive film made of the silver nanowire network mainly comes from the contact resistance between the silver nanowires. The use of ultra-long silver nanowires can make electrons mainly transmit inside the silver nanowires, reducing the overlap. The number of contacts reduces the contact resistance between the silver nanowires and improves the conductivity of the conductive film. In add...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24B22F1/00B82Y40/00B82Y30/00
CPCB22F9/24B82Y40/00B82Y30/00B22F1/0547B22F1/147B22F1/145
Inventor 林铁松黄钊何鹏
Owner HARBIN INST OF TECH
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