Method for preparing lobate ferroferric oxide aerogel particle

A technology of ferric oxide and airgel particles, which is applied in chemical instruments and methods, iron oxide/ferric hydroxide, oxides of ferrous iron, etc., can solve problems such as lack of 3D structure, and simplify the preparation process Effect

Active Publication Date: 2010-10-06
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no 3D structure of the flower-shaped magnetic Fe in the existing literature 3 o 4 A report on the preparation method of airgel materials, thus, the flower-shaped magnetic Fe 3 o 4 The preparation of airgel materials has a profound impact on optimizing the performance of the material and strengthening the application of the material

Method used

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  • Method for preparing lobate ferroferric oxide aerogel particle

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Embodiment 1

[0021] Prepare FeCl according to the total iron concentration of 0.3mol / L 2 4H 2 O and FeCl 3 ·6H 2 Mixed aqueous solution of O, where Fe 2+ with Fe 3+ The molar ratio is 10:1, stir to dissolve it, then add 0.5mol / L NaOH aqueous solution, stir rapidly, wash the mixed colloid twice with absolute ethanol, and ultrasonically break, the ultrasonic frequency is 30KHz, and the time is 10min, so that Fe 3 o 4 The precursor is uniformly dispersed in ethanol, where Fe(OH) 2 with Fe(OH) 3 The molar ratio is 10:1. Add 2 mL of 0.5 mol / L NaOH ethanol solution to 50 mL of absolute ethanol dissolved with 2 mol / L tartaric acid, adjust the pH value to 6.5, stir rapidly for 10 min, and centrifuge to generate ammonium tartrate ethanol solution, wash ammonium tartrate 3 with absolute ethanol The second time, ultrasonic crushing, the ultrasonic frequency is 30KHz, and the time is 10min. Fe(OH) 2 with Fe(OH) 3 The mixed colloid was quickly added to the ammonium tartrate ethanol solution,...

Embodiment 2

[0023] Prepare FeSO with a total iron concentration of 3mol / L 4 and Fe(SO 4 ) 3 A mixed ethanol solution, where Fe 2+ with Fe 3+ The molar ratio is 2:1, stir to make it dissolve, then add 1mol / L ammonia water ethanol solution, stir rapidly, wash the mixed colloid with absolute ethanol 3 times, ultrasonically break, ultrasonic frequency is 50KHz, time is 5min, make Fe 3 o 4 The precursor is uniformly dispersed in ethanol, where Fe(OH) 2 with Fe(OH) 3 The molar ratio is 2:1. In 100 mL of absolute ethanol with 4 mol / L tartaric acid dissolved, add 1 mol / L ammonia water ethanol solution, adjust the pH value to 7.2, stir rapidly for 5 minutes to generate ammonium tartrate ethanol solution, wash ammonium tartrate 3 times with absolute ethanol, and ultrasonically crush , the ultrasonic frequency is 95KHz, and the time is 5min. Fe(OH) 2 with Fe(OH) 3 The mixed colloid was quickly added to the ammonium tartrate ethanol solution, stirred continuously for 15 minutes, and 0.5mol / ...

Embodiment 3

[0026] Prepare Fe(NO 3 ) 2 and Fe(NO 3 ) 3 A mixed ethanol solution, where Fe 2+ with Fe 3+ The molar ratio is 1:8, stir to dissolve, then add 0.8mol / L KOH ethanol solution, stir rapidly, wash the mixed colloid with absolute ethanol 5 times, ultrasonically break, the ultrasonic frequency is 60KHz, and the time is 20min, so that Fe 3 o 4 The precursor is uniformly dispersed in ethanol, where Fe(OH) 2 with Fe(OH) 3 The molar ratio is 1:8. In 50 mL of absolute ethanol dissolved with 1.5 mol / L tartaric acid, add 0.2 mol / L KOH ethanol solution, adjust the pH value to 7.8, stir rapidly for 15 min, and generate ammonium tartrate ethanol solution, wash ammonium tartrate 5 times with absolute ethanol, and ultrasonically For crushing, the ultrasonic frequency is 60KHz and the time is 20min. Fe(OH) 2 with Fe(OH) 3 The mixed colloid was quickly added to the ammonium tartrate ethanol solution, stirred continuously for 10 minutes, and 0.9mol / L KOH ethanol solution was added to ad...

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Abstract

The invention relates to a method for preparing a lobate ferroferric oxide aerogel particle, which comprises the following concrete steps of: dispersing precursor Fe(OH)2 and Fe(OH)3 of a Fe3O4 crystal into a solution; dispersing the mixing solution into an ammonium tartrate ethanol solution for ageing for more than 1h at 20-90 DEG C; and preparing the lobate porous ferroferric oxide aerogel particle assembled by Fe3O4 nano pieces by adopting a supercritical drying method. The invention prepares the lobate ferroferric oxide aerogel particle by adopting a soft template method and utilizing a supercritical drying technology, has easy operation of the preparation process, and does not need the steps of impurity removal, and the like, and the prepared particle has the advantages of large specific surface area, crystal appearance, integral structure, high impurity, stable magnetic property, and the like; and the system has favorable application prospect in the fields of microwave absorption, high-energy batteries, targeted medicine materials, sensitive devices, catalysts, and the like.

Description

technical field [0001] The invention belongs to the technical field of preparation of inorganic particles with special appearance, and relates to a method for preparing flower-shaped iron ferric oxide airgel particles, especially a method for preparing flower-shaped iron ferric oxide airgel particles by a supercritical method. Background technique [0002] Airgel material is a new type of porous material, which has many unique properties such as large specific surface area, high porosity, low density, low refractive index, strong adsorption, and typical fractal structure. It has been obtained in many research fields. Wide range of applications. [0003] Fe 3 o 4 Due to its excellent properties such as good magnetic effect, chemical stability and good biocompatibility in photoelectricity, catalysis, and biology, it is widely used in pigments, magnetic fluids, magnetic microspheres, magnetic recording, catalysis, electronic communications, coatings, inks, targeting Drugs, i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/08B01J13/00
Inventor 沈晓冬伊希斌崔升
Owner NANJING UNIV OF TECH
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