Method for preparing fluorescent silver nano-clusters

A silver nanocluster, fluorescence technology, applied in nanotechnology, chemical instruments and methods, luminescent materials, etc., can solve the problems of poisoning of reagents, complex preparation process, high production cost, and achieve environmental friendliness, simple reaction process, and low cost. Effect

Inactive Publication Date: 2014-06-25
HEILONGJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a method for preparing fluorescent silver nanoclusters in order to solve the problems of complex preparation process, high production cost and the need for reaction reagents that are easy to cause environmental toxicity in the existing methods for preparing fluorescent silver nanomaterials

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  • Method for preparing fluorescent silver nano-clusters
  • Method for preparing fluorescent silver nano-clusters

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specific Embodiment approach 1

[0018] Specific embodiment one: a method for preparing fluorescent silver nanoclusters in this embodiment is carried out according to the following steps:

[0019] 1. Disperse silver salt and sodium oleate in distilled water respectively to obtain silver salt solution and sodium oleate solution;

[0020] Two, the silver salt solution and the sodium oleate solution are mixed and stirred and then placed in a constant temperature magnetic stirrer for heat treatment to obtain a solution after the reaction;

[0021] Three: Filter the solution after the reaction to remove solid matter to obtain water-soluble fluorescent silver nanoclusters, which is complete.

[0022] This embodiment includes the following beneficial effects:

[0023] 1. The reducing agent and stabilizer sodium oleate used in this embodiment are the main components of soap, which is environmentally friendly and cheap.

[0024] 2. In this embodiment, the size of the silver nanomaterial can be adjusted by changing t...

specific Embodiment approach 2

[0028] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the mass ratio of silver salt and sodium oleate described in step one is 1: (1~20), the mass ratio of silver salt and distilled water: 1 :(600~3000). Others are the same as the first embodiment.

specific Embodiment approach 3

[0029] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: the silver salt described in step one is silver nitrate. Others are the same as those in Embodiment 1 or 2.

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Abstract

The invention relates to a method for preparing fluorescent silver nano-clusters. The method mainly solves the problems that in an existing method for preparing fluorescent silver nano materials, preparation processes are complex, production cost is high, and needed reagents are prone to producing toxic effects on the environment. The method comprises the following steps that firstly, a certain amount of silver salt and a certain amount of sodium oleate are respectively dispersed in solvent water; secondly, the two solutions are mixed and stirred for a certain period of time and then placed on a constant temperature magnetic stirrer to be heated for a certain period of time after becoming even; thirdly, the reacted solutions are filtered, solid matter is removed, and the fluorescent silver nano-clusters are obtained. The fluorescent silver nano-clusters prepared with the method have good dispersity; besides, the method is simple, low in cost and environmentally friendly, and is a scientific method for preparing the fluorescent silver nano materials at low cost. The method is applied to the chemical engineering field.

Description

technical field [0001] The invention relates to a method for preparing fluorescent silver nanoclusters. Background technique [0002] Noble metal nanoclusters (about 2nm in size) have important application value in chemical detection, biomedicine, biological imaging and many other fields due to their excellent optical, electronic, chemical and catalytic properties. [0003] As we all know, when the size of nanoparticles is less than 2nm and close to the Fermi wavelength of electrons, the continuous state density will be broken into discrete energy levels, which will cause them to exhibit different properties from large-sized particles. In order to distinguish these ultra-small particles When the size of nanoparticles is close to (or smaller than) 2nm, it is usually called nanoclusters. In this size range, metal nanoclusters become molecular-like species and exhibit strong size-dependent fluorescence emission properties upon photoexcitation in the UV-vis range. Among all no...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24C09K11/58B82Y40/00
Inventor 田春贵付宏刚吴爱平王蕾孙立
Owner HEILONGJIANG UNIV
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