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A method for preparing iron oxide nanoparticles from tea leaves

A technology of iron oxide nanoparticles and particles, applied in the field of materials, can solve the problems of low biocompatibility, limited application, and difficult control of size properties of iron oxide nanoparticles

Active Publication Date: 2021-07-06
XINYANG NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

All in all, the iron oxide nanoparticles prepared by the existing preparation methods have defects such as low biocompatibility and difficult control of size properties, which limit their application in biomedicine

Method used

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  • A method for preparing iron oxide nanoparticles from tea leaves
  • A method for preparing iron oxide nanoparticles from tea leaves
  • A method for preparing iron oxide nanoparticles from tea leaves

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A method for preparing iron oxide nanoparticles by using tea leaves, comprising the following steps:

[0029] 1) 7.39g FeCl 3 •6H 2 O (4.44g FeCl 3 ) and 2.714g FeCl 2 • 4H 2 O (1.732g FeCl 2 ) was dissolved in 80 mL tea extract, in N 2 Under protection, at a temperature of 70°C and a stirring speed of 1000 rpm, after reflux for 30 minutes, add 20 mL of ammonia water, reflux for 30 minutes, then add 4 mL of 2 mg / mL citric acid, reflux for 60 minutes, cool to room temperature, and obtain a black mixture;

[0030] 2) Wash the black mixture in step 1) with ultrapure water, and separate with a permanent magnet to obtain iron oxide nanoparticles.

Embodiment 2

[0032] A method for preparing iron oxide nanoparticles by using tea leaves, comprising the following steps:

[0033] 1) 7.39g FeCl 3 •6H 2 O (4.44g FeCl 3 ) and 2.714g FeCl 2 • 4H 2 O (1.732g FeCl 2 ) was dissolved in 80 mL tea extract, in N 2 Under protection, at a temperature of 60°C and a stirring speed of 900 rpm, after reflux for 40 minutes, add 15 mL of ammonia water, reflux for 40 minutes, then add 4 mL of 2 mg / mL citric acid, reflux for 70 minutes, and cool to room temperature to obtain a black mixture;

[0034] 2) Wash the black mixture in step 1) with ultrapure water, and separate with a permanent magnet to obtain iron oxide nanoparticles.

Embodiment 3

[0036] A method for preparing iron oxide nanoparticles by using tea leaves, comprising the following steps:

[0037] 1) 7.39g FeCl 3 •6H 2 O (4.44g FeCl 3 ) and 2.714g FeCl 2 • 4H 2 O (1.732g FeCl 2 ) was dissolved in 80 mL tea extract, in N 2 Under protection, at a temperature of 70°C and a stirring speed of 1100 rpm, after reflux for 20 minutes, add 20 mL of ammonia water, reflux for 20 minutes, then add 5 mL of 2 mg / mL citric acid, reflux for 50 minutes, cool to room temperature, and obtain a black mixture;

[0038] 2) Wash the black mixture in step 1) with ultrapure water, and separate with a permanent magnet to obtain iron oxide nanoparticles.

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Abstract

The invention discloses a method for preparing iron oxide nanoparticles from tea leaves, which comprises the following steps: 1) dissolving iron hydrate in tea extract, 2 Under protection, the temperature is 60-100°C, the stirring speed is 900-1100rpm, after reflux for 20-40min, add a precipitant, reflux for 20-40min, then add a stabilizer, reflux for 50-70min, cool to room temperature, and obtain a black mixture ; Iron hydrate is FeCl 3 •6H 2 O and FeCl 2 • 4H 2 O mixture, the stabilizer is citric acid; 2) The black mixture in step 1) is washed and separated to obtain iron oxide nanoparticles. The present invention immobilizes citric acid on nanoparticles through a homogeneous reaction, overcomes the influence of structural factors of the immobilized carrier on the immobilization rate of nanoparticles in the heterogeneous reaction, the obtained nanoparticles have a high fixation rate, and the immobilization rate of citric acid is high. The reaction and the reduction reaction of the tea extract are carried out step by step. While the citric acid is immobilized, the formation of nanoparticles is also realized, which simplifies the preparation process; the prepared iron oxide nanoparticles have good monodispersity and cytocompatibility sex.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a method for preparing iron oxide nanoparticles from tea leaves. Background technique [0002] Tea leaves, which refer to the leaves and buds of tea trees, are currently the most used active medicine in the world, and have the advantages of high water solubility, low toxicity and biocompatibility. Tea Polyphenols (Tea Polyphenols) is a class of soluble components with the most content in tea, and it is also one of the main substances for tea to exert its health care effects, such as: caffeine, theanine, tea saponin, linalool, catechin, etc. , and catechins can also remove dangerous free radicals in the body and prevent the development of various diseases. [0003] At present, researchers at home and abroad have developed a variety of methods to prepare iron oxide nanoparticles, such as: high-temperature pyrolysis of organometallic precursors, synthesis of highly mo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G49/06B82Y40/00
Inventor 聂磊张明慧孙韶兰侯孟娟张莹莹董婧孙萌袁红雨韩艳婷陈世锋
Owner XINYANG NORMAL UNIVERSITY
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