Magnetic gold nanoparticle composite material, and preparation method and application thereof

A technology of gold nanoparticles and composite materials, which is applied in the field of preparation of magnetic Fe3O4-gold nanoparticle composite materials, can solve the problems of unfavorable storage, application, instability of composite materials, easy oxidation of thiol groups, etc., and achieve easy surface modification, Controllable process and mild method conditions

Inactive Publication Date: 2013-03-20
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, because the thiol group is easy to oxidize, it is not conducive to the later storage and application; while the effect of the amino group and gold nanoparticles is relatively weak, the prepared composite material is unstable, and it is easy to separate when ultrasonic

Method used

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  • Magnetic gold nanoparticle composite material, and preparation method and application thereof
  • Magnetic gold nanoparticle composite material, and preparation method and application thereof
  • Magnetic gold nanoparticle composite material, and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0036] Embodiment 1: Magnetic gold nanoparticle composite material and preparation method thereof

[0037] (1) Fe 3 o 4 Preparation of magnetic microspheres:

[0038] Weigh 1.35g of FeCl3 6H 2 Dissolve O in 40 mL of ethylene glycol, add 3.6 g of anhydrous sodium acetate and 1 g of polyethylene glycol-6000 in sequence, and stir magnetically for 0.5 h. The resulting solution was charged into a 50 mL stainless steel reaction kettle. Put it in an oven and react at 200°C for 12h. The obtained product was washed successively with deionized water and ethanol, and dried under vacuum at 60° C. for 6 h.

[0039] During the heating reaction, heat to 200-300°C for 8-24 hours; the product obtained is washed with deionized water and absolute ethanol for 3-6 times, and dried in vacuum at 40-80°C to obtain tetraoxide with a particle size of 100-500nm Tri-Fe Magnetic Microspheres

[0040] (2) Fe 3 o 4 / SiO 2 Preparation of microspheres

[0041] 1gFe 3 o 4 Redisperse the magnetic m...

Embodiment 2

[0051] Example 2: Magnetic gold nanoparticle composite material is used to adsorb benzopyrene in environmental water samples

[0052]A series of standard solutions with benzopyrene mass concentrations of 0.1, 0.5, 1, 5, 10, 50, and 100 μg / L were prepared with acetonitrile for liquid chromatography (the instrument model is Shimazu HPLC-20A, and the manufacturer is Shimadzu Corporation, Japan, The instrument is configured with RF-20A xs fluorescence detector, CTO-20AC column thermostat, and SIL-20AC autosampler; the chromatographic column is a Spursil C18 column, and the manufacturer is Beijing Dicoma Technology Co., Ltd.; the mobile phase is acetonitrile, and the flow rate is 1ml / min, the injection volume is 20μL; the excitation / emission wavelength of the fluorescence detector is set to 384 / 406nm) for determination, the mass concentration x of the standard solution is the abscissa, the peak area y is the ordinate, and the minimum The linear regression is carried out by the squa...

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Abstract

The invention discloses a magnetic gold nanoparticle composite material, and a preparation method and application thereof. The preparation method comprises the following steps: synthesizing ferroferric oxide magnetic microspheres, adding tetraethoxyl silicon to implement hydrolysis and polymerization on the magnetic microsphere surfaces, adding N-(2-aminoethyl)-3-aminopropyltrimethoxysilane to obtain surface-modified double-amino-group Fe3O4/SiO2 magnetic microspheres, and compounding the surface-modified double-amino-group magnetic microspheres with gold nanoparticles. The chelation action of the double amino groups is utilized to adsorb the gold nanoparticles more firmly; and the material combines the surface selectivity of the gold nanoparticles and the superparamagnetism of the magnetic nanoparticles, can extract benzopyrene in water, and can implement quick and efficient separation.

Description

technical field [0001] The invention belongs to the technical field of functional materials and analysis, and more specifically, relates to a magnetic iron surface-modified diamino 3 o 4 - Preparation method of gold nanoparticle composite material and its application in extraction of polycyclic aromatic hydrocarbons and hydrophobic compounds in water. Background technique [0002] Magnetic nanoparticles have the characteristics of nano-size effect, biocompatibility, etc., and are magnetically responsive, and can be easily guided or separated under the action of an external magnetic field, so they are widely used in magnetically targeted drug delivery, immunoassay, immobilization enzymes, cell or DNA separation, environmental detection and other fields. But the surface modification of magnetic nanoparticles is the key to their application. Gold nanoparticles have the advantages of small size, large surface area, and easy modification. Therefore, the combination of magnetic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/28B01J20/30C02F1/28C02F1/58
Inventor 邓小娟姚琲
Owner TIANJIN UNIV
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