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Method for preparing single dispersion triangular nano silver slice

A nano-silver flake, monodisperse technology, applied in the field of preparation of monodisperse triangular nano-silver flakes, can solve problems such as unfavorable large-scale production, high equipment requirements, and increase the difficulty of production operations, and achieve low cost, simple process, and equipment less demanding effect

Inactive Publication Date: 2007-03-28
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This has high requirements on equipment, and increases the difficulty of production operations, which is not conducive to industrialized mass production

Method used

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  • Method for preparing single dispersion triangular nano silver slice
  • Method for preparing single dispersion triangular nano silver slice

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Embodiment 1: the preparation method of the triangular nano-silver sheet whose average side length is 92 ± 9nm (Fig. 1e), its steps are:

[0015] (1) 480 milliliters of ternary solution systems containing water (6wt%) / PVP (K30, 5wt%) / n-amyl alcohol (89wt%) are prepared in a covered reaction vessel;

[0016] (2) 24 ml AgNO 3 (0.6wt% of the ternary solution system) the ethanol solution was added to the system under stirring, and after continuing to stir for 5 minutes, put it into a constant temperature box for heat treatment at 95° C. for 48 hours;

[0017] (3) centrifuging the heat-treated reaction solution to obtain high-purity triangular silver nanosheets of required size.

Embodiment 2

[0018] Embodiment 2: the preparation method of the triangular nano-silver sheet whose average side length is 120 ± 11nm (Fig. 1f), its steps are:

[0019] (1) 480 milliliters of ternary solution systems containing (6wt%) / PVP (K30, 7wt%) / n-amyl alcohol (87wt%) are prepared in a covered reaction vessel;

[0020] (2) 24 ml AgNO 3 (0.6wt%) ethanol solution was added to the system under stirring, and after continuing to stir for 5 minutes, put it into an incubator for heat treatment at 95° C. for 48 hours;

[0021] (3) centrifuging the heat-treated reaction solution to obtain high-purity triangular silver nanosheets of required size.

Embodiment 3

[0022] Embodiment 3: the preparation method of triangular nano-silver sheet, its steps are:

[0023] (1) 480 milliliters of ternary solution systems containing water (1wt%) / PVP (K30, 29wt%) / n-amyl alcohol (70wt%) are prepared in a covered reaction vessel;

[0024] (2) 24 ml AgNO 3 (0.1wt%) ethanol solution was added into the system under stirring, and after continuing to stir for 15 minutes, put it into an incubator for heat treatment at 60° C. for 30 hours;

[0025] (3) centrifuging the heat-treated reaction solution to obtain high-purity triangular silver nanosheets of required size.

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Abstract

The present invention discloses a preparation method of monodisperse trigonal nano silver sheet. Said method includes the following steps: (1), preparing three-component solution system formed from water, PVP and n-pentanol; (2), adding 0.1-0.6% of alcohol solution of AgNO3 into the above-mentioned system under the condition of continuous stirring, then placing the above-mentioned material into a constant temperature oven to make heat treatment at 60-100deg.C; and (3), centrifugalizing the above-mentioned reaction solution so as to obtain the invented high-purity trigonal nano silver sheet whose average side length can be regulated in the range of 24-120nm.

Description

1. Technical field [0001] The invention relates to a method for preparing metal nanomaterials, in particular to a method for preparing monodisperse triangular nano silver flakes. 2. Background technology [0002] Triangular silver nanosheets have a wide range of applications in photonics, optical sensors, optical lens technology, and biological labels due to their unique plasmon resonance optical properties [see literature: 1-17]. So far, there are light-induced transformation [see literature: 3-8], thermodynamic transformation [see literature: 9-12], micellar solution method [see literature: 13-16], solvent-induced morphology evolution [ See literature: 17] and other four types of methods are used to prepare triangular nano-silver flakes. Among the reported preparation methods, only the light-induced conversion method [see literature: 4] can realize the production of high-purity monodisperse triangular silver nanosheets with good shape and continuously adjustable size. How...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24
Inventor 章建辉刘淮涌王振林闵乃本
Owner NANJING UNIV
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