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Preparation method of monodisperse-metal oxide magnetic composite microsphere resisting acid and magnetic composite microsphere

A magnetic composite microsphere, acid-resistant technology, applied in the direction of microsphere preparation, chemical/physical/physicochemical process of energy application, microcapsule preparation, etc., can solve the problems that carbon-oxide magnetic composite materials have not been reported, and achieve The effect of being convenient for large-scale production, mild reaction conditions, and simple preparation process

Inactive Publication Date: 2009-12-09
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Ultrasonic atomization pyrolysis, as a simple, continuous production, easy to scale method has been used to synthesize oxide ceramic powder (Chinese patent: CN1040932, CN1298963), sulfide (J.Am.Chem.Soc .2005, 127, 9990.), but there is no report on carbon-oxide magnetic composites

Method used

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  • Preparation method of monodisperse-metal oxide magnetic composite microsphere resisting acid and magnetic composite microsphere
  • Preparation method of monodisperse-metal oxide magnetic composite microsphere resisting acid and magnetic composite microsphere
  • Preparation method of monodisperse-metal oxide magnetic composite microsphere resisting acid and magnetic composite microsphere

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) Disperse succinic acid in a certain amount of deionized water, magnetically stir evenly, and its initial concentration is 0.2g / mL;

[0036] (2) Dispersing ferric nitrate in the solution obtained in step (1), stirring evenly with a magnetic field, with an initial concentration of 0.2 g / mL, to obtain an aqueous solution of the precursor;

[0037] (3) Transfer the aqueous solution of the precursor obtained in step (2) to a microwave humidifier. Under the action of ultrasonic waves, the aqueous solution of the precursor obtained in step (2) is atomized into small droplets, and transported to the tube-type humidifier by nitrogen gas. in a quartz tube in a furnace. The nitrogen flow rate is 15 standard liters per minute (SLPM), and the temperature of the tube furnace is set at 1000°C;

[0038] (4) Collect the target product (collection time is about 1 hour) from step (3) quartz tube with the water tank that is housed, collect the product that obtains in the water tank wi...

Embodiment 2

[0041] (1) Disperse malic acid in a certain amount of deionized water, stir it evenly with a magnetic field, and its initial concentration is 0.2g / mL;

[0042] (2) Disperse cobalt chloride in the solution obtained in step (1), stir magnetically evenly, and its initial concentration is 0.2g / mL to obtain an aqueous precursor solution;

[0043] (3) Transfer the aqueous solution of the precursor obtained in step (2) to a microwave humidifier. Under the action of ultrasonic waves, the aqueous solution of the precursor obtained in step (2) is atomized into small droplets, and transported to the tube-type humidifier by nitrogen gas. in a quartz tube in a furnace. The nitrogen flow rate is 15 standard liters per minute (SLPM), and the temperature of the tube furnace is set at 1000°C;

[0044] (4) Collect the target product (collection time is about 1 hour) from step (3) quartz tube with the water tank that is housed, collect the product that obtains in the water tank with the magnet,...

Embodiment 3

[0046] (1) Disperse citric acid in a certain amount of deionized water, stir evenly with a magnetic field, and its initial concentration is 0.2g / mL;

[0047] (2) Disperse ferrous chloride and cobalt chloride in the solution obtained in step (1), stir evenly with a magnetic field, and the initial concentrations are 0.12g / mL and 0.08g / mL respectively, to obtain an aqueous precursor solution;

[0048] (3) Transfer the aqueous solution of the precursor obtained in step (2) to a microwave humidifier. Under the action of ultrasonic waves, the aqueous solution of the precursor obtained in step (2) is atomized into small droplets, and transported to the tube-type humidifier by nitrogen gas. in a quartz tube in a furnace. The nitrogen flow rate is 15 standard liters per minute (SLPM), and the temperature of the tube furnace is set at 1000°C;

[0049] (4) Collect the target product (collection time is about 1 hour) from step (3) quartz tube with the water tank that is housed, collect t...

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Abstract

The invention relates to a preparation method of a monodisperse-metal oxide magnetic composite microsphere resisting acid and the composite microsphere. The method comprises the following steps: a water soluble carbon source and water soluble inorganic metal salt are dispersed in deionized water and are mixed evenly in an electromagnetic way to obtain a precursor water solution; the precursor water solution is transferred to an ultrasonic atomizer apparatus to be atomized, and atomized drips are transported to a silica tube placed in a tubular furnace by taking inert gases as the carrier gas; the flow rate of the inert gases is 0.1-15 standard liter / min, and the temperature of the tubular furnace is set to be 400-1000 DEG C; and production is collected and dried to obtain the monodisperse-metal oxide magnetic composite microsphere resisting acid. By adjusting the carbon source, a hollow microsphere or a solid core / shell microsphere can be prepared selectively. The magnetic composite microsphere has good acid resistance and can be widely applied to fields such as data storage, nuclear magnetic resonance, magnetic separation biomolecule, drug loading, water environment restoration, and the like.

Description

technical field [0001] The invention relates to a method for preparing acid-resistant monodisperse carbon-metal oxide magnetic composite microspheres, and the acid-resistant monodisperse carbon-metal oxide magnetic composite microspheres prepared by the method, especially acid-resistant monodisperse Carbon-metal oxide magnetic composite microspheres of carbon-iron oxide, carbon-cobalt oxide, carbon-cobalt ferrite, etc. Background technique [0002] Metal oxides, especially magnetic metal oxides such as iron oxide, cobalt oxide, and cobalt ferrite, have important applications in the fields of data storage, magnetic resonance imaging, magnetic separation, biomolecules, drug loading, and environmental restoration. However, in the application of the above-mentioned oxide magnetic nanomaterials, they often lose their magnetism due to spontaneous aggregation and dissolution in various extreme environments, such as under acidic conditions. In order to solve the above problems, res...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/04B01J19/10
Inventor 唐芳琼郑荣波孟宪伟
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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