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Magnetic nano material solid phase extracting agent as well as preparation method and application thereof

A solid-phase extraction agent, magnetic nanotechnology, applied in chemical instruments and methods, preparation of test samples, other chemical processes, etc., can solve the problems of time-consuming operation, large sample loading resistance, and difficulty in separating extractant and mother liquor. , to achieve the effect of large specific surface area and strong extraction ability

Active Publication Date: 2015-01-07
CHINESE RES ACAD OF ENVIRONMENTAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The superparamagnetism of the material makes it quickly settle to the bottom of the beaker under the action of an external magnetic field, which overcomes the shortcomings of the general nanomaterial solid phase extraction technology, such as large sample loading resistance, time-consuming operation, and difficulty in separating the extraction agent from the mother liquor.

Method used

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  • Magnetic nano material solid phase extracting agent as well as preparation method and application thereof
  • Magnetic nano material solid phase extracting agent as well as preparation method and application thereof
  • Magnetic nano material solid phase extracting agent as well as preparation method and application thereof

Examples

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Embodiment 1

[0042] Embodiment 1: a kind of magnetic nanomaterial solid-phase extraction agent, comprises the magnetic silicon dioxide particle as inner core, as the layered double metal hydroxide of shell layer; Described magnetic silicon dioxide particle is to be coated with silicon dioxide It is formed on the magnetic nano core; the layered double metal hydroxide shell is Mg-Al double metal hydroxide. In this embodiment, the magnetic nano core is Fe 3 o 4 .

Embodiment 2

[0043] Embodiment 2: a kind of magnetic nanomaterial solid-phase extraction agent, comprises the magnetic silicon dioxide particle as inner core, as the layered double metal hydroxide of shell layer; Described magnetic silicon dioxide particle is to be coated with silicon dioxide It is formed on the magnetic nano core; the layered double metal hydroxide shell is Mg-Al double metal hydroxide. In this embodiment, the magnetic nano core is Fe 3 o 4 , Co, FeCo, Ni, FeCo, FeO in one. In this example, the magnetic nano cores were prepared by a solvothermal method.

Embodiment 3

[0044] Embodiment 3: The difference between this embodiment and the foregoing embodiments is that in this embodiment, the diameter of the magnetic nano-core is between 150nm-250nm, and the diameter of the magnetic nano-core can be 150nm, 180nm, 200nm, 220nm, 250nm. In this embodiment, the silicon dioxide layer in the magnetic silicon dioxide particles is obtained by hydrolysis of TEOS.

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Abstract

The invention provides a magnetic nano material solid phase extracting agent used for absorbing phthalate organic pollutants in an environmental water sample and a preparation method of the extracting agent. The magnetic nano material solid phase extracting agent comprises magnetic silicon dioxide particles serving as the inner core and layered bi-metal hydroxide serving as the shell layer, wherein the magnetic silicon dioxide particles are formed by coating a magnetic nano core with silicon dioxide; and the layered bi-metal hydroxide shell layer adopts Mg-Al bi-metal hydroxide. The preparation method for the solid phase extraction absorbent is simple, the raw material cost is low, a designed extraction process is fast and convenient, a small quantity of organic solvent is required to be used in the whole process, and environment friendliness is achieved.

Description

technical field [0001] The invention belongs to the field of chemical analysis testing instruments and equipment, and relates to a novel mixed micellar Fe 3 o 4 SiO 2 Mg-Al LDH composite material solid phase extraction agent. Background technique [0002] Solid phase extraction is currently the most widely used newer environmental sample pretreatment method. Compared with traditional liquid-liquid extraction, solid-phase extraction has the advantages of short extraction time, high recovery rate, high enrichment factor and less consumption of organic reagents. In recent years, magnetic nanomaterials have attracted extensive attention in various fields due to the combination of the unique physical and chemical properties of nanomaterials and the magnetic properties of magnetic materials. Its excellent adsorption performance and high specific surface area make it have great application potential in pollutant enrichment and sample pretreatment. The superparamagnetism of the...

Claims

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Application Information

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IPC IPC(8): B01J20/10B01J20/28B01J20/30C02F1/28G01N1/34G01N1/40C02F101/30C02F101/34
CPCB01J20/10B01J20/28B01J20/30C02F1/28G01N1/34G01N1/40B01J20/103B01J20/02B01J20/0229B01J20/041B01J20/08B01J2220/42B01J2220/4806C02F1/281C02F2101/30C02F2101/34
Inventor 赵晓丽吴丰昌汤智刘双柳
Owner CHINESE RES ACAD OF ENVIRONMENTAL SCI
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