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A superparamagnetic Fe 3 o 4 Preparation methods and applications of nanomaterials

A nanomaterial and superparamagnetic technology, applied in the field of nanomaterials, can solve the problems of low purity, poor crystallinity and magnetic properties, complicated preparation process, etc. of the hydrothermal reaction method, and achieve easy control of product composition, high adsorption performance and conditions. easy-to-control effects

Active Publication Date: 2019-09-24
HEFEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] However, the entire preparation process of the co-precipitation method needs to be carried out under the protection of an inert gas, resulting in a complicated preparation process.
At the same time, this method is generally carried out at low temperature, and the obtained Fe 3 o 4 Poor crystallinity and magnetic properties
The hydrothermal reaction method usually has limitations such as low purity, high cost and complicated operation, which limit its practical application

Method used

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  • A superparamagnetic Fe <sub>3</sub> o <sub>4</sub> Preparation methods and applications of nanomaterials
  • A superparamagnetic Fe <sub>3</sub> o <sub>4</sub> Preparation methods and applications of nanomaterials
  • A superparamagnetic Fe <sub>3</sub> o <sub>4</sub> Preparation methods and applications of nanomaterials

Examples

Experimental program
Comparison scheme
Effect test

preparation Embodiment 1

[0033] Preparation Example 1: Preparation of Superparamagnetic Fe 3 o 4 nanomaterials

[0034] (1) According to the molar ratio of 0.5:5, solid FeCl 3 ·6H 2 O was dissolved in distilled water, and magnetically stirred for 2 minutes at room temperature to fully dissolve it to obtain solution a.

[0035] (2) Slowly add triethanolamine (TEA) solution into solution a, the volume ratio of triethanolamine (TEA) to distilled water is 10:1, continue magnetic stirring for 2 minutes to obtain brownish red solution b.

[0036] (3) Adjust the pH of solution b to 10 with solid NaOH to obtain dark brown solution c.

[0037] (4) Put solution c in a reaction kettle, react at 180°C for 1.5 hours, take out the product by magnetic separation, and dry the obtained product in an oven at 60°C for 4 hours to obtain superparamagnetic Fe 3 o 4 nanomaterials.

[0038] figure 1 Be the XRD spectrogram of embodiment 1 gained product, with standard Fe 3 o 4 Spectrogram (JCPDS: 76-1849) compares a...

preparation Embodiment 2

[0043] Preparation Example 2: Preparation of Superparamagnetic Fe 3 o 4 nanomaterials

[0044] (1) According to the molar ratio of 0.1:5, solid FeCl 3 ·6H 2 O was dissolved in distilled water, and magnetically stirred at room temperature for 1 minute to fully dissolve it to obtain solution a.

[0045] (2) Slowly add triethanolamine (TEA) solution into solution a, the volume ratio of triethanolamine (TEA) to distilled water is 10:1, continue magnetic stirring for 3 minutes to obtain brownish red solution b.

[0046] (3) Adjust the pH of the solution b to 9 with ammonia water to obtain a dark brown solution c.

[0047] (4) Put solution c in a reaction kettle, react at 200°C for 2 hours, take out the product by magnetic separation, and dry the obtained product in an oven at 50°C for 6 hours to obtain superparamagnetic Fe 3 o 4 nanomaterials.

preparation Embodiment 3

[0048] Preparation Example 3: Preparation of Superparamagnetic Fe 3 o 4 nanomaterials

[0049] (1) According to the molar ratio of 0.5:15, solid FeCl 3 ·6H 2 O was dissolved in distilled water, and magnetically stirred for 3 minutes at room temperature to fully dissolve it to obtain solution a.

[0050] (2) Slowly add triethanolamine (TEA) solution into solution a, the volume ratio of triethanolamine (TEA) to distilled water is 10:1, continue magnetic stirring for 1 minute to obtain brownish red solution b.

[0051] (3) Adjust the pH of the solution b to 8 with ammonia water to obtain a dark brown solution c.

[0052] (4) Put solution c in a reaction kettle, react at 160°C for 6 hours, take out the product by magnetic separation, and dry the obtained product in an oven at 70°C for 2 hours to obtain superparamagnetic Fe 3 o 4 nanomaterials.

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Abstract

A superparamagnetic Fe 3 o 4 The preparation method and application of nanomaterials relate to the technical field of nanomaterials. solid FeCl 3 ·6H 2 Dissolve O in distilled water, stir at room temperature to fully dissolve to obtain solution a; slowly add triethanolamine (TEA) into solution a, and continue stirring to obtain brownish red solution b; adjust the pH of solution b with ammonia water or solid NaOH value, a dark brown solution c was obtained; the solution c was hydrothermally synthesized in an airtight state, and finally the product was taken out by magnetic separation. Superparamagnetic Fe prepared by the present invention 3 o 4 Nanomaterials have good water solubility, good biocompatibility, high adsorption, excellent catalytic and magnetic properties, and can be applied in magnetic resonance imaging, data storage, drug and gene targeting, cell separation and sewage treatment, etc. field, has broad application prospects.

Description

technical field [0001] The invention relates to the technical field of nanomaterials, in particular to a superparamagnetic Fe 3 o 4 Preparation methods and applications of nanomaterials. Background technique [0002] Superparamagnetic nanoparticles have important applications in magnetic resonance imaging, data storage, drug and gene targeting, cell separation, and hyperthermia. Fe 3 o 4 It has many advantages such as non-toxic and cheap, and can be used as magnetic fluid, magnetic resonance imaging, and lithium battery electrode materials. Most of these applications require Fe 3 o 4 The material has high stability, small size and high dispersion performance. At the same time, the study also showed that Fe 3 o 4 The surface of nanoparticles has bound Fe 2+ / Fe 3+ , with H in solution 2 o 2 It can constitute a Fenton-like reaction system, which is applied to the Fenton-like catalytic degradation of organic pollutants, and has potential application value in sewage...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/06B01J20/30C02F1/28C02F101/30C02F101/38
Inventor 韩成良张凌云朱德杰姚李徐泽忠
Owner HEFEI UNIV