CN110732680A

CN110732680A - Method for preparing silver nano particles by using aminated column [5] arene as stabilizer

Info

Publication number: CN110732680A
Application number: CN201911178620.3A
Authority: CN
Inventors: 孙燕; 崔玉荃; 吴若; 郭放; 郇文慧; 刁国旺
Original assignee: Yangzhou University
Current assignee: Yangzhou University
Priority date: 2019-11-27
Filing date: 2019-11-27
Publication date: 2020-01-31

Abstract

The invention discloses amination columns [5]]The method for preparing the silver nano particles by taking the aromatic hydrocarbon as the stabilizer comprises the following steps: column [5] aminated]Adding AgNO into aromatic solution₃The solution is quickly stirred, and NaBH is quickly injected into the solution₄Stirring the solution for 5-10 minutes to obtain an amination column [5]]Arene-protected silver nanoparticles. The method solves the defects that impurities are easy to generate and the structure of the silver nanoparticles is easy to damage in the traditional preparation method, and enough binding sites can include small organic molecules.

Description

Method for preparing silver nano particles by using aminated column [5] arene as stabilizer

Technical Field

The invention belongs to the technical field of nano materials, and relates to a preparation method of silver nano particles.

Background

Because of its many unique properties, such as surface and interface effect, small size effect, tunneling effect, quantum size effect, is attracting the attention of scientists, and because of these unique properties, silver nano-materials have -wide application in electric, acoustic, optical, catalytic and other fields.

Although researchers have conducted various researches and obtained definite results, silver-based antibacterial agents are difficult to realize industrial production due to experimental conditions and cost limitations, and the existing preparation methods often ignore the influences of toxicity of raw materials and solvents on organisms and environment.

Disclosure of Invention

The invention aims to provide methods for preparing silver nanoparticles by using amination column [5] arene as a stabilizer.

The technical proposal for realizing the aim of the invention is that methods for preparing silver nano particles by taking amination column [5] arene as a stabilizer comprise the following steps:

1) preparing an amination column [5] arene solution with the pH = 0.5-2.0;

2) AgNO with the preparation concentration of 9.7mM₃A solution;

3) column [5] aminated]Adding AgNO into aromatic solution₃The solution is stirred rapidly at the stirring speed of 350-500 r/min for 5-10 minutes, and NaBH with the concentration of 0.01-0.20M is injected into the solution rapidly₄Stirring the solution for 5-10 min to change the color of the solution and turn the solution into bright yellow to obtain the aminated column [5]]Arene-protected silver nanoparticles.

Preferably, an amination column [5]]Aromatic hydrocarbons and AgNO₃In a molar ratio of 1: 20-1: 50.

preferably, NaBH₄With AgNO₃In a molar ratio of 1: 10-1: 1: 100.

compared with the prior art, the invention has the advantages that:

1) the amination column [5] arene is used as a stabilizer to prepare the silver nanoparticles, and the reagent has the advantages of good dispersibility, strong stability, simple and convenient operation and time saving in the preparation of the silver nanoparticles.

2) The amido column [5] arene is non-toxic and harmless, is modified around the silver nanoparticles, and provides a wider space for the application of the silver nanoparticles.

Drawings

FIG. 1 shows that NaBH is added when Ag nanoparticles are prepared according to the invention₄The TEM photograph thereafter.

FIG. 2 is a distribution diagram of the particle size of Ag nanoparticles prepared by the present invention.

FIG. 3 shows that NaBH with different concentrations is added during the preparation of Ag nanoparticles₄Ultraviolet ray after irradiation.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in detail below with reference to examples.

The method for preparing the silver nanoparticles by using the aminated column [5] arene as the stabilizer obtains good use results, combines the column arene and the nano silver, is equivalent to the combination of supermolecule and nano materials, can well play the advantages and the performances of the column arene and the nano silver, and has great space for the further research of step .

The molecular structural formula of the amination-modified column [5] arene is as follows:

。

example 1

(1) preparation of amination column [5] arene solution at pH = 1.0: 2.6 mg of aminated column [5] arene was weighed into dilute nitric acid pH =1.0 and stirred for 5 min.

(2) Amination column [5]Preparing silver nanoparticles by using arene as a stabilizer: to the above 8mL amination column [5]]Adding 9.7 mmoL of AgNO into aromatic hydrocarbon solution₃Rapidly stirring for 5 minutes at the rotating speed of 350-plus-material 500 r/min, and then respectively and rapidly injecting the freshly prepared NaBH₄(0.01 M) The solution was stirred for 5 minutes at 0.8mL, and the color of the solution was observed to change to bright yellow.

Example 2

(1) preparation of amination column [5] arene solution at pH = 1.0: 5.2 mg of aminated column [5] arene was weighed into an aqueous solution adjusted to pH =1.0 with concentrated nitric acid and stirred for 5 min.

(2) Amination column [5]Preparing silver nanoparticles by using arene as a stabilizer: to a prepared 8mL amination column [5]]Adding 9.7 mmoL of AgNO into aromatic hydrocarbon solution₃Quickly stirring for 5min, and respectively and quickly injecting newly prepared NaBH₄(0.20M) 1 mL of the solution was stirred for 10 minutes to observe the change in color of the solution.

As shown in FIG. 1, the silver nanoparticles prepared by the invention have good dispersibility and are in a nano-sphere shape.

FIG. 2 is a statistical graph of the particle size distribution of the silver nanoparticles prepared according to the present invention, wherein the particle size distribution of the nanoparticles prepared according to the present invention is in the range of 1-11 nm. Most of them are around 5.7 nm.

FIG. 3 is an ultraviolet absorption spectrum of silver nanoparticles prepared by the present invention, the maximum absorption peak is about 420 nm, which is the ultraviolet characteristic peak of the silver nanoparticles.

Claims

1, amination columns [5]]The method for preparing the silver nano particles by taking the aromatic hydrocarbon as the stabilizer is characterized by comprising the following steps: column [5] aminated]Adding AgNO into aromatic solution₃The solution is quickly stirred, and NaBH is quickly injected into the solution₄And stirring the solution for 5-10 minutes.

2. The method of claim 1, wherein the pH of the aminated column [5] arene solution is = 0.5-2.0.

3. The method of claim 1, wherein the concentration of the amination column [5] arene solution is 0.6 to 0.75 mg/mL.

4. The method of claim 1, wherein AgNO₃The concentration of the solution was 9.7 mM.

5. The method as claimed in claim 1, wherein the stirring speed of the rapid stirring is 350-500 r/min for 5-10 min.

6. The method of claim 1, wherein the NaBH is₄The concentration of the solution is 0.01-0.20M.

7. The method of claim 1, wherein the column [5] is aminated]Aromatic hydrocarbons and AgNO₃In a molar ratio of 1: 20-1: 50.

8. the method of claim 1, wherein the NaBH is₄With AgNO₃In a molar ratio of 1: 10-1: 100.