Preparation method for magnetic nanoparticles coated with highly ordered mesoporous carbon

A magnetic nanoparticle, highly ordered technology, applied in the fields of nanotechnology, nanotechnology, nanotechnology, etc. for materials and surface science, can solve the problems of pore occupancy, magnetic nanoparticle exposure, etc., and achieve efficient separation and preparation steps Simple, exposure-avoiding effects

Active Publication Date: 2014-11-05
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a method for preparing highly ordered mesoporous carbon-coated magnetic nanoparticles to solve the problem

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  • Preparation method for magnetic nanoparticles coated with highly ordered mesoporous carbon
  • Preparation method for magnetic nanoparticles coated with highly ordered mesoporous carbon
  • Preparation method for magnetic nanoparticles coated with highly ordered mesoporous carbon

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[0033] Example 1

[0034] (1) Preparation of ferroferric oxide nanoparticles modified with polyacrylic acid: ferric chloride, sodium acetate, and sodium acrylate with a molar ratio of 1:10:10 are dissolved in a mixed solvent of ethylene glycol and diethylene glycol , After stirring, transfer to a hydrothermal reaction kettle, hydrothermally react for 12 hours to obtain ferroferric oxide magnetic nanoparticles;

[0035] (2) Disperse ferroferric oxide magnetic nanoparticles in deionized water, add cetyltrimethylammonium bromide (CTAB), the mass ratio of ferroferric oxide magnetic nanoparticles to CTAB is 3:7, stir After a certain period of time, add polyether F127 (PEO 106 PPO 70 PEO 106 ), the mass ratio of F127 to ferroferric oxide magnetic nanoparticles is 5, and a solution of ferroferric oxide magnetic nanoparticles coated with CTAB surface active organic template is obtained by stirring;

[0036] (3) Preparation of carbon source prepolymer: phenol and formaldehyde as raw material...

Example Embodiment

[0039] Example 2

[0040] (1) Preparation of ferroferric oxide nanoparticles modified with oleic acid on the surface: mix ferric triacetylacetonate, ethylene glycol, oleic acid, and oleylamine in a certain proportion, dissolve and transfer to a hydrothermal reactor, and heat up to 200 ℃, hydrothermal reaction for 3 hours to prepare magnetic nanoparticles of ferroferric oxide;

[0041] (2) Disperse the above ferroferric oxide nanoparticles in chloroform, add F127 aqueous solution, stir for a certain period of time, heat up and volatilize to remove the chloroform, to obtain a surfactant-coated ferroferric oxide nanoparticle solution;

[0042] (3) Preparation of carbon source precursor: phenol, formaldehyde as raw materials, and NaOH as catalyst. The molar ratio of phenol and formaldehyde is 1:3. The reaction is carried out at 70°C for 30 minutes to obtain a carbon source precursor solution.

[0043] (4) Mix the ferroferric oxide nanoparticle solution coated with surfactant and the carb...

Example Embodiment

[0045] Example 3

[0046] (1) Preparation of ferroferric oxide nanoparticles modified with octylamine on the surface: add ferric triacetylacetonate to a mixed solvent of octylamine and alcohol, transfer to a hydrothermal reactor, heat up to 240°C, and hydrothermally react for 2h to prepare Obtain ferroferric oxide magnetic nanoparticles;

[0047] (2) Disperse the above ferroferric oxide nanoparticles in chloroform, add F127 aqueous solution, stir for a certain period of time, heat up and volatilize to remove the chloroform, to obtain a surfactant-coated ferroferric oxide nanoparticle solution;

[0048] (3) Preparation of carbon source precursor: Resorcinol, formaldehyde as raw materials, and ammonia water as catalyst. The molar ratio of resorcinol to formaldehyde is 1:2. The reaction is conducted at 35°C for 30 minutes to obtain a carbon source precursor solution.

[0049] (4) Mix the ferroferric oxide nanoparticle solution coated with surfactant and the carbon source precursor solut...

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Abstract

The invention relates to a preparation method for magnetic nanoparticles coated with highly ordered mesoporous carbon. The method comprises the following steps of: making the magnetic nanoparticles as an inner core; fully coating the outer layer of the magnetic inner core with an organic template agent by static or hydrophobic interaction; and carbonizing at a high temperature to form the magnetic nanoparticles coated with the channel height ordered mesoporous carbon through self-assembly coating of an organic polymer precursor which can be used for forming mesoporous carbon and the organic template agent on the surface of the magnetic inner core. The magnetic nanoparticles coated with highly ordered mesoporous carbon, which is prepared according to the method, can be applicable for the fields such as bioseparation, medicine transfer, magnetic resonance imaging radiography and catalysis.

Description

technical field [0001] The invention belongs to the field of mesoporous composite materials, and in particular relates to a preparation method of highly ordered mesoporous carbon-coated magnetic nanoparticles. Background technique [0002] Mesoporous carbon materials have attracted extensive attention due to their highly ordered and regular mesoporous channel structure, continuously adjustable pore size, high specific surface area and pore volume, excellent stability and biocompatibility. Magnetic nanoparticles have excellent magnetic orientation, which can quickly realize positioning, guidance and separation. Mesoporous carbon-coated magnetic materials have the characteristics of good mesoporous carbon material properties and easy external magnetic field control, and have superior applications in the fields of magnetically targeted drug delivery, magnetic hyperthermia, rapid biological separation, nuclear magnetic resonance imaging, and catalysis. prospect. [0003] At pr...

Claims

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Application Information

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IPC IPC(8): H01F1/01B82Y30/00
Inventor 吴仁安徐桂菊刘荣张宇
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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