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Surface-modified magnetic material of benzenesulfonic acid and its preparation method and application

A magnetic material and surface modification technology, applied in the direction of magnetism of inorganic materials, peptides, etc., can solve the problems of limited adsorption capacity and few reports on magnetic materials, and achieve the effect of strong selectivity, rapid separation and enrichment, and not easy to oxidize

Inactive Publication Date: 2016-01-06
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the adsorption capacity of pure magnetic materials is limited, so it is necessary to carry out appropriate modification on its surface to improve the selectivity and adsorption performance.
Commonly used modification groups include C18, phenyl, amino, polymer, etc. Among them, magnetic materials modified by hydrophobic groups are the most widely used, while magnetic materials modified by ionic groups are rarely reported.

Method used

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  • Surface-modified magnetic material of benzenesulfonic acid and its preparation method and application
  • Surface-modified magnetic material of benzenesulfonic acid and its preparation method and application
  • Surface-modified magnetic material of benzenesulfonic acid and its preparation method and application

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Embodiment 1: the preparation of the magnetic material of surface modification benzene sulfonic acid

[0036] Preparation of magnetic microspheres

[0037] Weigh 1.3g of FeCl 3 ·6H 2 O and 0.7 g FeSO 4 ·6H 2 Dissolve O in 50 mL of deionized water, add 20 mL of sodium hydroxide aqueous solution (1.5 mol / L) under rapid stirring (that is, weigh 1.2 g of sodium hydroxide and dissolve in 20 mL of deionized water), and then stir at room temperature for 3 hours to form Magnetic Fe 3 o 4 Nanoparticles: Magnetic nanoparticles were collected with the assistance of an external magnetic field, washed 6 times with deionized water and ethanol, and dried in vacuum at 6O°C for 24h to obtain dry magnetic Fe 3 o 4 For nanoparticles, specific reference may be made to Y.P.He, S.Q.Wang, C.R.Li, Y.M.Miao, Z.Y.Wu, and B.S.Zou, J.Phy.D: Appl.Phys.2005, 38, 1342-1350.

[0038] Fe 3 o 4 / SiO 2 Preparation of microspheres

[0039] Magnetic Fe 3 o 4 1.0g of nanoparticles was redisper...

Embodiment 2

[0044] Example 2: The magnetic material with surface-modified benzenesulfonic acid is used to extract vancomycin and norvancomycin in environmental water samples

[0045] A series of mixed standard solutions with mass concentrations of 10, 20, 50, 100, 150, 200, and 300 μg / L of vancomycin and norvancomycin were prepared with deionized water for liquid chromatography determination, and the instrument model was ShimazuHPLC-20A , the manufacturer is Shimadzu Corporation of Japan, the instrument is equipped with SPD-M20A diode array (DAD) detector, CTO-20AC column thermostat, SIL-20AC autosampler; the chromatographic column is SpursilC18 column, and the manufacturer is Beijing Dike Ma Technology Co., Ltd.; mobile phase is acetonitrile: 5mmol potassium dihydrogen phosphate buffer solution (adjust the pH value to 3.2 with phosphoric acid) (volume ratio is 90:10), the flow rate is 1ml / min, the injection volume is 20μL, and the detection wavelength is 230nm, take the mass concentratio...

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Abstract

The invention discloses a preparation method and application of a magnetic material for surface finish benzene sulfonic acid. The preparation method comprises the steps of adopting FeCl3 as a raw material, enabling ethylene glycol to serve as a disperse system, enabling anhydrous sodium acetate to serve as a reducing agent, and utilizing a hydrothermal method to prepare ferroferric oxide magnetic microspheres; then dispersing the ferroferric oxide magnetic microspheres into ethanol / water mixed solution, adding ammonia water and tetraethoxy-silicane, enabling tetraethoxy-silicane to undergo hydrolytic polymerization on the surfaces of the magnetic microspheres, and obtaining an core-shell magnetic material; dispersing the core-shell magnetic material to mixed solution of toluene and N,N-dimethylformamide after drying, adding 2-(4-chloride sulfonyl phenyl)-ethyl trimethoxy silane, and obtaining the magnetic material for surface finish benzene sulfonic acid by a silanization reaction. The magnetic material has rich active groups, can be dispersed stably in solution, is renewable and can be recycled. The magnetic material serves as an adsorbent, is large in surface area and strong in selectivity, weakly alkaline compounds can be adsorbed from a matrix by strong electrostatic interaction of sulfo groups and hydrophobic interaction of a benzene ring, and rapid separation and enrichment can be achieved by simple magnetic field effect.

Description

technical field [0001] The invention belongs to the technical field of functional materials and analysis, and more specifically relates to a surface-modified benzenesulfonic acid Fe 3 o 4 Preparation methods and applications of magnetic materials. Background technique [0002] Vancomycin and norvancomycin are two commonly used glycopeptide antibiotics, which are clinically used to prevent and treat infections caused by Gram-positive bacteria. At present, glycopeptide antibiotics are also widely used in feed additives and veterinary drugs for poultry, cattle, pigs, etc., to promote animal growth and treat livestock and poultry diseases. However, these antibiotics also have certain nephrotoxicity and ototoxicity. With the widespread use of glycopeptide antibiotics, these antibiotics remain in water or food and may enter the human body through the food chain, endangering human health. Therefore, it is necessary to carry out a limited inspection of glycopeptide antibiotics. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/36C07K9/00C07K1/14
Inventor 邓小娟姚琲林奎陈小平郭前进
Owner TIANJIN UNIV
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