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Method for preparing gold nanoparticles through fructus lycii extract liquid

A technology of nano-gold particles and leaching solution, which is applied in nanotechnology, metal processing equipment, transportation and packaging, etc., can solve problems such as nano-gold particles that have not yet been seen, and achieve the effect of avoiding residues

Active Publication Date: 2016-09-28
UNIV OF SHANGHAI FOR SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, it has been found that there are few types of plants that can be used, including grapefruit, geranium and vine tea, etc., and wolfberry has not been used to synthesize gold nanoparticles.

Method used

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  • Method for preparing gold nanoparticles through fructus lycii extract liquid
  • Method for preparing gold nanoparticles through fructus lycii extract liquid
  • Method for preparing gold nanoparticles through fructus lycii extract liquid

Examples

Experimental program
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Effect test

Embodiment 1

[0030] In this embodiment, the preparation reaction process of gold nanoparticles is as follows:

[0031] First, put 25mL of wolfberry extract into a flask, heat to boiling, and keep boiling for 5 minutes;

[0032] Then, get 100 μ L of chloroauric acid solution and add to the flask, measure the pH of the reaction system after the chloroauric acid solution is added, keep the reaction system boiling, and take a sample after reacting for a certain period of time;

[0033] Finally, part of the samples obtained from the above sampling were centrifuged at 8000 rpm for 10 minutes, and the precipitate obtained by centrifugation was dried at 40° C. to 50° C. to obtain gold nanoparticles corresponding to different reaction times.

[0034] Wherein, after adding the chloroauric acid solution, the pH of the reaction system is 5.16; the time points of sampling are respectively 2 minutes, 5 minutes, 10 minutes, 15 minutes, and 20 minutes, and the samples obtained by sampling are divided into...

Embodiment 2

[0042] In this embodiment, for the same methods, conditions and equipment as those in Embodiment 1, the same descriptions are omitted.

[0043] In this embodiment, the preparation reaction process of gold nanoparticles is as follows:

[0044] First, take 25ml wolfberry extract and put it into a flask, heat it to boiling, and keep boiling for 10 minutes;

[0045] Then, get 200 μ L of chloroauric acid solution and add to the flask, measure the pH of the reaction system after the chloroauric acid solution is added, keep the reaction system boiling, and take a sample after reacting for a certain period of time;

[0046] Finally, centrifuge and dry part of the samples obtained from the above sampling to obtain gold nanoparticles corresponding to different reaction times.

[0047] Wherein, after adding the chloroauric acid solution, the pH of the reaction system is 4.96.

[0048] Figure 4 It is the ultraviolet-visible absorption spectrum (UV-Vis) figure of the reaction solution ob...

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Abstract

The invention provides a method for preparing gold nanoparticles through fructus lycii extract liquid. The method comprises the following steps that firstly, fructus lycii is washed and then subjected to extraction through deionized water, and the fructus lycii extract liquid is obtained; secondly, the fructus lycii extract liquid obtained in the first step is heated to be boiled, and boiling is kept for a certain time, a chloroauric acid solution is added into the fructus lycii extract liquid to form a reaction system, the pH of the reaction system is adjusted to be 4.0-5.5 by regulating the addition amount of the chloroauric acid solution, the reaction system is kept in a boiling state, reaction is carried out for 2-60 minutes, and reaction liquid is obtained; thirdly, the reaction liquid obtained in the second step is subjected to centrifugal separation, precipitate is obtained and dried, and the gold nanoparticles are obtained. The particle sizes of the gold nanoparticles prepared through the method are smaller than 50 nm, and the gold nanoparticles do not contain chemical reagent residuals and are suitable for being applied to the field of biological medicines.

Description

technical field [0001] The invention relates to a method for preparing nanomaterials, in particular to a method for preparing nano-gold particles by using wolfberry extract. Background technique [0002] Nanoparticle materials refer to materials with a particle size below 100nm. Among them, nanoparticle materials composed of metal element gold, that is, nano-gold particle materials have unique optical, electrical and catalytic properties, and have broad application prospects in many fields. . [0003] In recent years, researchers have discovered that gold nanoparticle markers can be prepared after surface modification of gold nanoparticles, and the gold nanoparticle markers still have similar spectral properties to gold nanoparticles. Using this characteristic of gold nanoparticles, Nano-gold particles can be prepared as biological probes to detect the labeled substances. Therefore, gold nanoparticles have good application prospects in the field of biomedicine. [0004] A...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24B22F1/00B82Y40/00
CPCB82Y40/00B22F9/24B22F1/054
Inventor 孙丽尹跃超吕鹏程
Owner UNIV OF SHANGHAI FOR SCI & TECH
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