Preparation method and application of core-shell type Fe3O4/C magnetic nano solid extracting agent

A solid-phase extraction agent and magnetic nanotechnology, which is applied in the direction of inorganic material magnetism, other chemical processes, chemical instruments and methods, etc., can solve the problems of strong binding ability and difficult elution of target objects, achieve strong extraction ability and fast processing process , the effect of less dosage

Inactive Publication Date: 2010-03-10
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
View PDF0 Cites 39 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Carbon materials also have certain disadvantages as solid-phase extraction

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method and application of core-shell type Fe3O4/C magnetic nano solid extracting agent
  • Preparation method and application of core-shell type Fe3O4/C magnetic nano solid extracting agent
  • Preparation method and application of core-shell type Fe3O4/C magnetic nano solid extracting agent

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0023] Example 1: Preparation method of magnetic nano material extractant of the present invention

[0024] Core-shell Fe provided by the invention 3 O 4 / C The schematic diagram of the synthesis of magnetic nanomaterial extractant is as figure 1 As shown, the specific preparation method can be divided into the following two steps:

[0025] First, prepare nanometer iron oxide. First add 5.2g FeCl 3 ·6H 2 O and 2.0g FeCl 2 ·4H 2 O and 0.85mL concentrated hydrochloric acid are dissolved in 25mL pre-treated with N 2 In the deoxygenated aqueous solution; under vigorous mechanical stirring, add the above solution dropwise to 250mL 1.5mol / L NaOH aqueous solution, and continue to stir the reaction for 0.5 hours after the addition is complete; after the reaction is over, use an external magnetic field The nanoparticles are separated.

[0026] Secondly, prepare core-shell Fe 3 O 4 / C Magnetic nanomaterials. Take a quarter of the prepared Fe 3 O 4 The magnetic particles were washed three tim...

Example Embodiment

[0027] Example 2: Structural characterization of the magnetic nanomaterial extractant of the present invention

[0028] This example is to perform structural characterization of the magnetic nanomaterial extractant prepared in Example 1, and the details are as follows:

[0029] 1. Characterization of particle size and morphology

[0030] Observation of the prepared core-shell Fe with transmission electron microscope (TEM) 3 O 4 / C Magnetic nanomaterials, the TEM photos are as figure 2 Shown. From figure 2 It can be seen that the prepared Fe 3 O 4 / C Nano particles are basically spherical, and the darker inner part is Fe 3 O 4 The magnetic core has a particle size of about 10nm, the lighter part of the outer layer is coated with carbon material, and the coating layer is 2-5nm. The entire nanoparticle presents an obvious core-shell structure.

[0031] 2. Elemental analysis

[0032] Determination of Fe prepared by X-ray energy spectrometer 3 O 4 And Fe 3 O 4 / C The content of each eleme...

Example Embodiment

[0037] Example 3: Test of the adsorption performance of the magnetic nanomaterial extractant of the present invention

[0038] In this example, the alkylphenol pollutants bisphenol A (BPA), nonylphenol (4-OP) and octylphenol (4-NP), phthalate pollutants n-propyl phthalate (DPP), Butyl phthalate (DBP), cyclohexyl phthalate (DCP) and n-octyl phthalate (DOP), polycyclic aromatic hydrocarbon pollutants phenanthrene (PhA), fluoranthene (FluA), pyrene (Pyr), benzene And [a]anthracene (BaA), benzo[b]fluoranthene (BbF), benzo[a]pyrene (BaP), benzo[g,h,i]perylene (BghiP), etc. as common pollutants Representative, the adsorption performance of the magnetic nanomaterial extractant prepared in Example 1 was tested.

[0039] The operation steps of the test are as follows Image 6 As shown, the specific experimental process is as follows: add appropriate amount of standard solutions of various pollutants to the water sample, stir well, add the prepared magnetic nanomaterial solid phase extract...

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
Saturation magnetic strengthaaaaaaaaaa
Saturation magnetic strengthaaaaaaaaaa
Login to view more

Abstract

The invention relates to a Fe3O4/C magnetic nano solid extracting agent coated with a novel carbon material, belonging to the field of chemical analysis and test instruments and equipment. The extracting agent simultaneously has large special surface area of nano material, short disperse path, magnetic separation capacity of magnetic material and strong adsorption capacity of carbon material, thereby being very suitable for pretreating large-scale and large-size water samples in batch. In addition, the solid extracting agent is simple to prepare, low in raw material cost, rapid and convenientto extract and friendly to the environment and only needs using a small amount of organic solvent in the whole process.

Description

technical field [0001] The invention belongs to the field of chemical analysis testing instruments and equipment, and relates to a novel carbon material-coated Fe 3 o 4 The magnetic nano solid phase extraction agent is used as a sample pretreatment material to enrich organic pollutants in large-volume environmental water samples. Background technique [0002] The background and development status of this technical field are roughly as follows: Solid phase extraction is a relatively new environmental sample pretreatment method widely used at present. Solid phase extraction has the advantages of short extraction time, high recovery rate, high enrichment factor and less consumption of organic reagents. Nanomaterials have a high specific surface area and excellent adsorption performance, but due to the small particle size of the nanoparticles, it is difficult to carry out the above-mentioned solid-phase extraction loading and passing through the column. Fe 3 o 4 Magnetic na...

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): B01J20/20B01J20/06H01F1/11
Inventor 蔡亚岐张升晓
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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