Method for preparing magnetic ferric oxide nano particles

A magnetic iron oxide and nanoparticle technology, applied in the fields of chemistry, physics and inorganic non-metallic nanomaterials, can solve the problems of ecological pollution, harsh reaction conditions, complicated processes, etc., and achieve the effect of strong adsorption, low price and high purity

Inactive Publication Date: 2008-03-19
WUHAN UNIV
View PDF3 Cites 20 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods have disadvantages such as complex process, harsh reaction conditions, and the particle size of the product cannot be controlled.
The current industrial method for preparing iron oxide nanoparticles is to first prepare the iron hydroxide precursor and then roast it at high temperature, but this method is difficult to prepare small-sized nanomaterials with good properties
In the invention of Chinese patent application number 200410086479.1, the inventor propos

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Place 50 g of cleaned cellulose fibers in 1 liter of iron salt solution with a concentration of 0.1 mol / L and soak for 5 minutes, then take out the cellulose fibers and place them in 1 liter of NaOH solution with a concentration of 0.2 mol / L and soak them fully to obtain The cellulose composite fiber with a certain color is washed with water and dried to obtain the iron oxide / magnetic cellulose composite fiber. The iron oxide / magnetic cellulose composite fiber was fired at 350° C. for 5 hours in an air atmosphere to obtain magnetic iron oxide nanoparticles. The particle size of this particle was about 9 nm, and the yield was 0.45%.

Embodiment 2

[0018] After 500 g of cleaned cellulose fiber was placed in 1 liter of iron salt with a concentration of 0.2 mol / L and soaked for 4 hours, the cellulose fiber was taken out and fully soaked in 1 liter of NaOH solution with a concentration of 1 mol / L to obtain a The cellulose composite fiber of a certain color is washed with water and dried to obtain the iron oxide / magnetic cellulose composite fiber. The iron oxide / magnetic cellulose composite fiber was burned in an air atmosphere at a temperature of 600° C. for 3 hours to obtain magnetic iron oxide nanoparticles. The particle size of this particle is about 23nm. The yield was 1.71%.

Embodiment 3

[0020] After soaking 1000 g of cleaned cellulose fibers in 1 liter of iron salt with a concentration of 0.5 mol / L for 8 hours, take out the cellulose fibers and place them in 1 liter of NaOH solution with a concentration of 2 mol / L to obtain The cellulose composite fiber with a certain color is washed with water and dried to obtain the iron oxide / magnetic cellulose composite fiber. The iron oxide / magnetic cellulose composite fiber was fired at 1000° C. in air for 20 minutes to obtain magnetic iron oxide nanoparticles. The particle size of this particle is about 48nm. The yield was 11.53%.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Particle sizeaaaaaaaaaa
Particle sizeaaaaaaaaaa
Particle sizeaaaaaaaaaa
Login to view more

Abstract

The invention discloses a preparation method for a magnetic iron oxide nanometer particle. The cleaned cellulose fibers are immersed in the 0.1-0.5mol/l ferric salt or ferrous salt solution; after the ferric ions in the ferric salt or ferrous salt solution are fully absorbed in the micro-pores of the cellulose fibers or on the surface of the cellulose fibers, the cellulose fibers are immersed in the 0.2-4mol/l NaOH solution; the ferric ions and the ferrous ions in the solution generate the ferric hydroxide precipitation or the ferrous hydroxide precipitation in the micro-pores of the cellulose fibers to constitute the cellulose composite fibers; the ferric oxide/cellulose composite fibers are obtained after the dehydration of the cellulose composite fibers; finally, the ferric oxide/cellulose composite fibers are ignited in the air atmosphere or the oxygen atmosphere at the temperature of 350-1000 Celsius system for 20-300 minutes, so that the magnetic iron oxide nanometer particles with high purity are obtained. The method has a simple operation and the low cost raw materials, the prepared iron oxide nanometer particles have the even diameter distribution with a certain magnetism.

Description

technical field [0001] The invention relates to a method for preparing magnetic iron oxide nanoparticles, which belongs to the field of inorganic non-metallic nanometer materials, and also belongs to the fields of physics and chemistry. technical background [0002] Because iron oxide nanoparticles are widely used in practice, there are many preparation methods for iron oxide nanoparticles, such as hydrothermal method, forced hydrolysis method, sol-gel method, solid phase method, microwave method, physical pulverization method, Mechanical ball milling method and so on. However, these methods have disadvantages such as complex process, harsh reaction conditions, and the particle size of the product cannot be controlled. The current industrial method for preparing iron oxide nanoparticles is to first prepare iron hydroxide precursor and then roast it at high temperature, but this method is difficult to prepare small-sized nanomaterials with good properties. In the invention ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C01G49/06
Inventor 张俐娜刘石林周金平
Owner WUHAN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap