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5-sulfosalicylic acid functionalized fe3o4 magnetic NANO particles, as well as synthesis method and application of NANO particles

A technology of magnetic nanoparticles and sulfosalicylic acid, applied in chemical instruments and methods, alkali metal compounds, inorganic chemistry, etc., to achieve good dispersion, good adsorption, and simple synthesis methods

Inactive Publication Date: 2014-12-17
GUANGXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no report on the modification of magnetic nanoparticles with 5-sulfosalicylic acid, and there is no report on the adsorption of selenium ions by magnetic nanoparticles modified with 5-sulfosalicylic acid.

Method used

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  • 5-sulfosalicylic acid functionalized fe3o4 magnetic NANO particles, as well as synthesis method and application of NANO particles
  • 5-sulfosalicylic acid functionalized fe3o4 magnetic NANO particles, as well as synthesis method and application of NANO particles
  • 5-sulfosalicylic acid functionalized fe3o4 magnetic NANO particles, as well as synthesis method and application of NANO particles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] 1) Fe 3 o 4 Preparation of Magnetic Nanoparticles (MNPs)

[0037] Accurately weigh 4.7300g FeCl 3 ·6H 2 O and 1.9881g FeCl 2 4H 2 O(Fe 3+ :Fe 2+ =1.75:1, n / n), dissolved in 200mL deoxygenated water (deoxygenated sub-boiling water), ultrasonicated for 10min, then transferred to a 500mL three-necked flask, stirred at 800rpm at 85°C for 30min under nitrogen protection, and quickly added 20mL Ammonia water with a concentration of 25% to 28%, the color of the solution turns black immediately (the pH of the solution is 9.5 at this time), and it is matured for 30 minutes. The reaction mixture was cooled to room temperature, separated by an external magnetic field, washed three times alternately with sub-boiling water and absolute ethanol, dried under vacuum at 70 °C, and cooled to obtain MNPs.

[0038] 2) Fe 3 o 4 / SiO 2 Preparation of Magnetic Nanoparticles (SMNPs)

[0039] Dissolve 2 g of the above-prepared MNPs in 200 mL of glycerol and sub-boiling water (1:1, v...

Embodiment 2

[0057] 1) Preparation of MNPs

[0058] Press Fe 3+ :Fe 2+ = 2:1 ratio of the amount of substance to accurately weigh FeCl 3 ·6H 2 O and FeCl 2 4H 2 O, add deoxygenated water (deoxygenated water is deoxygenated sub-boiling water, the amount of deoxygenated water is calculated by using 100mL deoxygenated water per 0.01mol iron salt (including ferrous iron salt and ferric iron salt), ultrasonic 5min, and then transferred to In a 500mL three-necked flask, under the protection of nitrogen, stir at 1000rpm at 70°C for 10min, quickly add ammonia water (concentration: 25%) to adjust the pH of the solution to 10, and mature for 60min. The reaction mixture was cooled to room temperature, separated by an external magnetic field, washed three times alternately with sub-boiling water and absolute ethanol, dried under vacuum at 60°C, and cooled to obtain MNPs;

[0059] 2) Preparation of SMNPs

[0060] Dissolve 2 g of the above-prepared MNPs in 200 mL of ethanol and sub-boiling water ...

Embodiment 3

[0066] 1) Preparation of MNPs

[0067] Press Fe 3+ :Fe 2+ = 1.3:1 The ratio of the amount of substance to accurately weigh FeCl 3 ·6H 2 O and FeCl 2 4H 2 O, add deoxygenated water (deoxygenated water is deoxygenated sub-boiling water, the amount of deoxygenated water is calculated by using 50mL deoxygenated water for every 0.01mol iron salt (including ferrous iron salt and ferric iron salt), ultrasonic 30min, and then transferred to In a 500mL three-necked flask, stirred at 1000rpm at 90°C for 20min under nitrogen protection, quickly added ammonia water (concentration: 28%) to adjust the pH of the solution to 9, and matured for 120min. The reaction mixture was cooled to room temperature, separated by an external magnetic field, washed three times alternately with sub-boiling water and absolute ethanol, dried under vacuum at 60°C, and cooled to obtain MNPs;

[0068] 2) Preparation of SMNPs

[0069] Dissolve 3 g of the above-prepared MNPs in 200 mL of ethanol and sub-boil...

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Abstract

The invention discloses 5-sulfosalicylic acid functionalized Fe3O4 magnetic nano particles, as well as a synthesis method and application of the nano particles. The 5-sulfosalicylic acid functionalized Fe3O4 magnetic nano particles are formed by wrapping Fe3O4 magnetic nano particles with tetraethyl orthosilicate, and generating reaction between the obtained Fe3O4 / SiO2 magnetic nano particles and 5-sulfosalicylic chloride. The synthesis method of the particles disclosed by the invention is simple; the synthesized particles are spherical, uniform in dimension and high in dispersion property, and have a good adsorption effect on Se speciation; a feasible basis is supplied to research of trace Se speciation in an environment water sample.

Description

technical field [0001] The invention relates to a 5-sulfosalicylic acid functionalized Fe 3 o 4 The magnetic nanoparticle and its synthesis method and application belong to the technical field of nanomaterials. Background technique [0002] Magnetic particles (MPs) are usually composed of magnetic elements such as iron, nickel, cobalt and their oxides. Superparamagnetic iron oxide nanoparticles (Fe 3 o 4 , γ-Fe 2 o 3 ), as a new solid-phase extraction adsorbent, has attracted widespread attention in the field of atomic spectroscopy. Magnetic nanoparticles have the following advantages: easy surface modification, selective adsorption of analytes, and biocompatibility. Bare Fe 3 o 4 It is easy to aggregate and has no selectivity for matrix adsorption in complex samples, using SiO 2 Coated Fe 3 o 4 Nanoparticles avoid the oxidation of the particle surface to change the magnetic properties, and at the same time provide the possibility for further chemical functionali...

Claims

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Application Information

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IPC IPC(8): B01J20/292B01J20/28B01J20/30
Inventor 邓必阳
Owner GUANGXI NORMAL UNIV
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