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Preparation method of fe3o4/go magnetic composite material

A technology of magnetic composite materials and magnetic microspheres, which can be used in the preparation of microspheres, chemical instruments and methods, microcapsule preparations, etc. Effect

Inactive Publication Date: 2016-02-24
GUANGXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when purely using GO as a solid-phase extraction adsorbent for the enrichment of trace organics in environmental water samples and biological samples, there are obvious shortcomings that are difficult to operate.

Method used

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  • Preparation method of fe3o4/go magnetic composite material
  • Preparation method of fe3o4/go magnetic composite material
  • Preparation method of fe3o4/go magnetic composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Preparation of Fe 3 o 4 / GO-A

[0045] 20mgFe 3 o 4 / SiO 2 / SH and 10 mg GO were added to 60 mL of an aqueous solution with a pH of 10.0, ultrasonically dispersed for 5 min, then mechanically stirred at 60 °C for 6 h, then the reaction was stopped and the Fe 3 o 4 / GO was separated from the supernatant, washed 3 times with water and dried in vacuum to obtain a Fe 3 o 4 / GO magnetic composite material Fe 3 o 4 / GO-A.

[0046] Wherein the external magnet is to place a magnet outside the bottom of the beaker; the magnetic microspheres modified by thiol (Fe 3 o 4 / SiO 2 / SH) particle size is about 200nm.

Embodiment 2

[0048] Preparation of Fe 3 o 4 / GO-B

[0049] 20mgFe 3 o 4 / SiO 2 / SH and 10 mg GO were added to 60 mL of an aqueous solution with a pH of 7.0, ultrasonically dispersed for 5 min, then mechanically stirred at 90 °C for 6 h, then the reaction was stopped and the Fe 3 o 4 / GO was separated from the supernatant, washed 3 times with water and dried in vacuum to obtain another Fe 3 o 4 / GO magnetic composite material Fe 3 o 4 / GO-B.

[0050] Wherein the external magnet is to place a magnet outside the bottom of the beaker; the magnetic microspheres modified by thiol (Fe 3 o 4 / SiO 2 / SH) particle size is about 200nm.

[0051] The synthetic reaction schematic diagram of above-mentioned embodiment 1 and embodiment 2 sees figure 1 .

[0052] To the Fe obtained in above-mentioned embodiment 1 and embodiment 2 3 o 4 / GO magnetic composites were analyzed and tested, and their characterizations are as follows.

[0053] SEM analysis

[0054] Fe 3 o 4 / GO-A and Fe 3 o ...

Embodiment 3

[0067] Magnetic solid phase extraction of aromatic amines

[0068] First, weigh 10 mg Fe 3 o 4 / GO was added to a 150mL water sample with a pH of 5.0, and the aromatic amine and Fe 3 o 4 / GO binding and capture to the solid surface. In order to capture the aromatic amine more completely, the mixture was first ultrasonicated for 2 min, and then placed in a water bath at 20°C for 15 min to equilibrate. Then a magnet is added to move the Fe 3 o 4 The / GO-arylamine complex was separated from the water sample, and the aromatic amine was desorbed with 2 mL of acetonitrile (1% NaOH).

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Abstract

The invention provides a preparation method for a ferroferric oxide / graphene oxide (Fe3O4 / GO) magnetic composite material. Go is bonded on the surface of a magnetic microsphere modified by sulfydryl through a click chemical synthesis method by using a lot of epoxy active groups contained on the surface of the GO. A preparation process comprises the following steps: adding the sulfydryl modified magnetic microsphere Fe3O4 / SiO2 / SH and the GO into a water solution with the pH (Potential of Hydrogen) of 6.5-10.0; carrying out ultrasonic dispersion, reacting at 60-100 DEG C and stirring; after reaction is completely stopped, applying a magnetic field to separate the Fe3O4 / GO from liquid; and finally, washing with the water, and drying in vacuum. The preparation method is simple and rapid and moderate in conditions; a lot of Fe3O4 / GO magnetic composite materials coated by the GO are successfully prepared. Particularly, the surface of Fe3O4 / GO-B of the Fe3O4 / GO magnetic composite material which is prepared when the pH of the water solution is 6.5-7.5 has a very thick graphene oxide coating and the enrichment capacity is better.

Description

technical field [0001] The present invention relates to graphene oxide (GrapheneOxide, GO), specifically graphene oxide magnetic composite material, more specifically Fe 3 o 4 / GO magnetic composite materials preparation method. Background technique [0002] Graphene oxide (Graphene Oxide, GO) is a product obtained by chemical oxidation and hydrolysis of reduced graphite powder. GO has the advantages of excellent electrical, mechanical and thermal conductivity, and there are a large number of hydroxyl, carboxyl, and epoxy active groups on its surface. [1,2] And other active groups, so it has good hydrophilicity, biocompatibility and easy chemical modification. GO can have strong π-π, hydrogen bonding and electrostatic interactions with trace analytes in environmental and biological samples, making it an ideal choice for solid-phase extraction materials [3-8] . However, when purely using GO as a solid-phase extraction adsorbent for the enrichment of trace organics in env...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/20B01J20/30B01J20/28B01J13/02
Inventor 卢昕刘晓菲陈丽红
Owner GUANGXI NORMAL UNIV
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