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A kind of monodisperse, superparamagnetic ferroferric oxide nano flower and preparation method thereof

A superparamagnetic and nanoflower technology, applied in the direction of iron oxide/iron hydroxide, nanotechnology, ferrous oxide, etc., can solve the problems of poor repeatability, unstable product, complicated operation, etc., and achieve stable The effect of good performance, easy adjustment of process parameters, and low equipment requirements

Active Publication Date: 2022-01-28
SHAANXI UNIV OF SCI & TECH
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Problems solved by technology

The introduction of surfactants and polymers can either directly form a stable protective layer on the surface of the microspheres, or form a stable shell on the surface of the microspheres through electrostatic adsorption, chemical modification, etc. after the microspheres are successfully prepared. In the experimental process of post-modification, there are problems such as complex operation, unstable product, and poor repeatability.

Method used

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  • A kind of monodisperse, superparamagnetic ferroferric oxide nano flower and preparation method thereof
  • A kind of monodisperse, superparamagnetic ferroferric oxide nano flower and preparation method thereof
  • A kind of monodisperse, superparamagnetic ferroferric oxide nano flower and preparation method thereof

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preparation example Construction

[0031] A kind of preparation method of monodisperse, superparamagnetic ferroferric oxide nano flower, comprises the steps:

[0032] (1) Preparation of precursor

[0033] Dissolve soluble iron salt and alkali source in 1,2-propanediol, stir and ultrasonically homogenize, then heat the mixture to 90-110°C, and the obtained uniform turmeric mixture is Fe 3 o 4 precursor solution. Wherein the molar ratio of the soluble iron salt to the alkali source is 0.1-0.15.

[0034] (2) Fe 3 o 4 Preparation of nanoflowers

[0035] Fe synthesized in step (1) 3 o 4 The precursor solution is transferred into a polytetrafluoroethylene reactor, and reacted at 150-220° C. for 8-24 hours. After the reaction, the black solid precipitate on the bottom of the polytetrafluoroethylene inner substrate was alternately washed several times with ethanol and deionized water, and then the powder was collected after freeze-drying to obtain superparamagnetic Fe 3 o 4 nanoflowers.

[0036] The soluble ...

Embodiment 1

[0040] (1) Add anhydrous ferric chloride and anhydrous sodium acetate into 1,2-propanediol solution, stir and sonicate for 30 minutes to dissolve completely, and obtain a uniform bright yellow solution. In the above solution, the molar amounts of anhydrous ferric chloride and anhydrous sodium acetate are 0.005 and 0.05 moles respectively, and 1,2-propanediol is 40ml. Then continue to heat the mixture to 90°C to obtain a turmeric solution, which is Fe 3 o 4 precursor solution.

[0041] (2) Fe prepared in step (1) 3 o 4 The precursor solution was subjected to hydrothermal reaction at a reaction condition of 150° C. for 8 hours. After the reaction, magnetically separate, wash the black solid precipitate with absolute ethanol and deionized water alternately several times, and freeze-dry to obtain superparamagnetic Fe 3 o 4 nanoflowers.

Embodiment 2

[0043] (1) Add anhydrous ferric chloride and urea into the 1,2-propanediol solution, stir and sonicate for 30 minutes to dissolve completely, and obtain a uniform bright yellow solution. In the above solution, the concentrations of anhydrous ferric chloride and urea were 0.005 and 0.015 moles, respectively, and 1,2-propanediol was 40 ml. Then continue to heat the mixture to 95°C to obtain a turmeric solution, which is Fe 3 o 4 precursor solution.

[0044] (2) Fe prepared in step (1) 3 o 4 The precursor solution was subjected to hydrothermal reaction under the reaction condition of 180° C. for 12 hours. After the reaction, magnetically separate, wash the black solid precipitate with absolute ethanol and deionized water alternately several times, and freeze-dry to obtain superparamagnetic Fe 3 o 4 nanoflowers.

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Abstract

The invention provides a monodisperse, superparamagnetic ferriferric oxide nanoflower and a preparation method thereof, comprising the steps of: (1) adding a soluble iron salt and an alkali source into 1,2-propylene glycol, and mixing uniformly to obtain a bright yellow mixture liquid, heated to 90-110°C, and after the bright yellow mixture turns into ginger yellow, Fe 3 o 4 Precursor solution; (2) Fe 3 o 4 The precursor solution is subjected to solvothermal reaction. After the reaction, the precipitate is separated, washed and dried to obtain monodisperse, superparamagnetic Fe 3 o 4 nanoflowers. In the present invention, particles with good dispersion and stability can be obtained without adding any dispersant, such as surfactant or polymer, during the preparation process. The technological process of the present invention is simple and convenient, and experiment repeatability is good, and the obtained product Fe 3 o 4 It has monodisperse and superparamagnetic properties, and has good development prospects in the field of biomedicine.

Description

technical field [0001] The invention relates to the technical field of synthesis of nanomaterials, in particular to a monodisperse, superparamagnetic Fe 3 o 4 Nanoflower and preparation method thereof. Background technique [0002] In recent years, magnetic nanoparticles Fe 3 o 4 Because of its unique magnetic properties and biocompatibility, it is widely used in the field of biomedicine. In terms of in vivo applications, it is mainly for the diagnosis and treatment of diseases. For example, it is used as a contrast agent in magnetic resonance imaging to assist imaging; Magnetic Fe 3 o 4 Diagnosis and treatment of tumors can be realized; at the same time, Fe 3 o 4 As a drug-loading system, precise drug delivery and release can be achieved with the help of an external magnetic field. In vitro, superparamagnetic Fe 3 o 4 It has great potential advantages in biological separation and detection. For example, in cell separation, the surface of the material is coupled w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G49/08B82Y40/00
CPCC01G49/08B82Y40/00C01P2004/30C01P2004/04C01P2002/72C01P2006/42
Inventor 杨冬王丽霞高可奕雷蕾贾彤彤
Owner SHAANXI UNIV OF SCI & TECH
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