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Surface-functionalized Fe3O4 nanoparticles as well as preparation method and application thereof

A surface functionalization, nanoparticle technology, applied in dyeing organosilicon compound treatment, dyed low molecular organic compound treatment, measurement device, etc. Reactive functional groups, unfavorable nanomaterial surface modifications and applications

Active Publication Date: 2014-08-06
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing surface modification methods include physical adsorption, surface deposition, electrostatic interaction and van der Waals force, etc. Most of these methods cannot make the surface of ferroferric oxide nanomaterials have different reactive functional groups, or although they have surface reactive functional groups, but The interaction with the surface of nanomaterials is weak, which is not conducive to the further surface modification and application of nanomaterials

Method used

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  • Surface-functionalized Fe3O4 nanoparticles as well as preparation method and application thereof
  • Surface-functionalized Fe3O4 nanoparticles as well as preparation method and application thereof
  • Surface-functionalized Fe3O4 nanoparticles as well as preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment 1: this surface functionalized Fe 3 o 4 The preparation method of nanoparticles comprises the following steps:

[0029] 1. Preparation of magnetic Fe3O4 nanoparticles

[0030] Take 2.0244 g FeCl 2 4H 2 O and 5.3904 g FeCl 3 ·6H 2 O was dissolved in 150 ml of distilled water, and under the condition of nitrogen protection, 55 ml of ammonia water was added dropwise with a constant pressure funnel at a rate of 5 ml / min, heated in a water bath at 65°C and stirred for 2 h, stopped heating, cooled naturally for 30 min, and distilled water , absolute ethanol, and toluene for 3 times, and vacuum-dried for 12 h to obtain magnetic Fe with uniform particle size distribution 3 o 4 Nanoparticles.

[0031] 2. Synthesis of 8-chloroacetylaminoquinoline derivatives

[0032] Take 0.95 g of 8-aminoquinoline in a round bottom flask, add 1 ml of triethylamine, then add 50 ml of dichloromethane solution, keep at 0°C for 30 min; Under light conditions, magnetic stirring...

Embodiment 2

[0041] Embodiment 2: this surface functionalized Fe 3 o 4 The preparation method of nanoparticles comprises the following steps:

[0042] 1. Preparation of magnetic Fe3O4 nanoparticles

[0043] Take 0.2 g FeCl 2 4H 2 O and 0.54 g FeCl 3 ·6H 2 O was dissolved in 50 ml of distilled water, and under the condition of nitrogen protection, 5.5 ml of ammonia water was added dropwise with a constant pressure funnel at a rate of 1 ml / min, heated in a water bath at 40°C and stirred for 6 h, then stopped heating, cooled naturally for 20 min, and then used distilled water, After washing with absolute ethanol and toluene for 3 times, and vacuum drying for 1 h, magnetic Fe with uniform particle size distribution was obtained. 3 o 4 Nanoparticles.

[0044] 2. Synthesis of 8-chloroacetylaminoquinoline derivatives

[0045] Take 0.095 g of 8-amino-2-ethylquinoline in a round bottom flask, add 0.1 ml of triethylamine, then add 5 ml of dichloromethane solution, keep at 0°C for 10 min; ...

Embodiment 3

[0053] Embodiment 3: this surface functionalized Fe 3 o 4 The preparation method of nanoparticles comprises the following steps:

[0054] 1. Preparation of magnetic Fe3O4 nanoparticles

[0055] Take 20g FeCl 2 4H 2 O and 54 g FeCl 3 ·6H 2 O was dissolved in 300 ml of distilled water, and under the condition of nitrogen protection, 100 ml of ammonia water was added dropwise with a constant pressure funnel at a rate of 10 ml / min, heated in a water bath at 90°C and stirred for 1 h, then stopped heating, cooled naturally for 60 min, and distilled water , absolute ethanol, and toluene for 3 times, and vacuum-dried for 24 h to obtain magnetic Fe with uniform particle size distribution. 3 o 4 Nanoparticles.

[0056] 2. Synthesis of 8-chloroacetylaminoquinoline derivatives

[0057] Take 9.5 g of 8-amino-2-methylquinoline in a round bottom flask, add 10 ml of triethylamine, then add 500 ml of dichloromethane solution, keep at 0°C for 60 min; then add 6 ml of chloroacetyl chl...

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Abstract

The invention discloses a surface functionalized Fe3O4 nanoparticle and a preparation method thereof, as well as a method for enriching and detecting Cu2+. The method uses chemically synthesized 8-chloroacetamidoquinoline derivatives and chemical covalent coupling. The surface of Fe3O4 nanoparticles was modified, and surface functionalized magnetic Fe3O4 nanoparticles were used to treat Cu2+ aqueous solutions of different concentrations, and then atomic absorption was used to detect the enrichment and adsorption effect. The results showed that the surface functionalized Fe3O4 nanoparticles had Trace amounts of Cu2+ have a strong enrichment effect, and the enrichment capacity is 10-15 times that of Fe3O4 nanoparticles without surface functionalization. The surface functionalized Fe3O4 nanoparticles prepared by this method have the characteristics of good enrichment of Cu2+, high adsorption efficiency, simple operation and easy analysis, and this method can be used to effectively enrich and detect trace amounts of Cu2+ present in the solution.

Description

technical field [0001] The invention relates to a surface functionalized Fe 3 o 4 Nanoparticles and their preparation methods and applications, especially a method for surface modification and particle size control of iron ferric oxide nanoparticles with a synthetic 8-chloroacetamidoquinoline derivative, and applied to Cu 2+ enrichment and detection. Background technique [0002] Ferroferric oxide nanoparticles are widely used as magnetic recording materials, immobilized enzymes, immunodiagnosis, targeted drugs, catalyst carriers, magnetic microspheres and biological probes due to their magnetic properties, readily available raw materials, and low prices. In recent years, the synthesis and modification of magnetic Fe3O4 particles have attracted widespread attention. For example, in the Chinese patent whose publication number is CN 101554574A, an aminosilane coupling agent is used to modify the surface of glucose-coated superparamagnetic iron ferric oxide nanoparticles. S...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09C1/24C09C3/12C09C3/08C02F1/28G01N33/00
Inventor 周阳孔祥峰马文会谢克强魏奎先伍继君戴永年
Owner KUNMING UNIV OF SCI & TECH
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